bluuebunny/crossref_metadata_2025 huggingface dataset:
Role of VGF-Derived Carboxy-Terminal Peptides in Energy Balance and Reproduction: Analysis of “Humanized” Knockin Mice Expressing Full-Length or Truncated VGF
Authors: Sadahiro Masato , Erickson Connor , Lin Wei-Jye , Shin Andrew C. , Razzoli Maria , Jiang Cheng , Fargali Samira , Gurney Allison , Kelley Kevin A. , Buettner Christoph , Bartolomucci Alessandro , Salton Stephen R.
Published: February 2015

Targeted deletion of VGF, a secreted neuronal and endocrine peptide precursor, produces lean, hypermetabolic, and infertile mice that are resistant to diet-, lesion-, and genetically-induced obesity and diabetes. Previous studies suggest that VGF controls energy expenditure (EE), fat storage, and lipolysis, whereas VGF C-terminal peptides also regulate reproductive behavior and glucose homeostasis. To assess the functional equivalence of human VGF1–615 (hVGF) and mouse VGF1–617 (mVGF), and to elucidate the function of the VGF C-terminal region in the regulation of energy balance and susceptibility to obesity, we generated humanized VGF knockin mouse models expressing full-length hVGF or a C-terminally deleted human VGF1–524 (hSNP), encoded by a single nucleotide polymorphism (rs35400704). We show that homozygous male and female hVGF and hSNP mice are fertile. hVGF female mice had significantly increased body weight compared with wild-type mice, whereas hSNP mice have reduced adiposity, increased activity- and nonactivity-related EE, and improved glucose tolerance, indicating that VGF C-terminal peptides are not required for reproductive function, but 1 or more specific VGF C-terminal peptides are likely to be critical regulators of EE. Taken together, our results suggest that human and mouse VGF proteins are largely functionally conserved but that species-specific differences in VGF peptide function, perhaps a result of known differences in receptor binding affinity, likely alter the metabolic phenotype of hVGF compared with mVGF mice, and in hSNP mice in which several C-terminal VGF peptides are ablated, result in significantly increased activity- and nonactivity-related EE.
Successful Treatment of Type B Insulin Resistance With Rituximab
Authors: Manikas Emmanouil-Dimitrios , Isaac Iona , Semple Robert K. , Malek Rana , Führer Dagmar , Moeller Lars C. , Führer-Sakel Dagmar
Published: February 2015

Context:

Type B insulin resistance is a very rare disease caused by autoantibodies against the insulin receptor. The mortality of type B insulin resistance is high (>50%), and management of this disease is not yet standardized. We report the successful treatment of a patient with type B insulin resistance with rituximab, cyclophosphamide, and prednisone.

Case Description:

A 45-year-old woman presented with unintended weight loss of 20 kg, unusually widespread acanthosis nigricans, and glucose levels > 500 mg/dL, which could not be controlled with up to 600 IU/d of insulin. Because of the severity of the insulin resistance combined with features of insulin deficiency, type B insulin resistance was suspected. Detection of high levels of insulin receptor autoantibodies confirmed the diagnosis. Neither immunosuppressive therapy with Ig iv nor plasmapheresis had an effect on glucose levels or insulin dose. Because the patient's condition was deteriorating, we started rituximab (750 mg/m2 in two doses 2 wk apart) together with cyclophosphamide (100 mg/d orally) and dexamethasone 40 mg/d for 4 days. Two months after initiation of rituximab therapy, fasting glucose levels ranged from 80 to 110 mg/dL and could be controlled with very low insulin doses. Glycated hemoglobin decreased from 11.8 to 6.5%. Two months later, insulin therapy was stopped, and the patient showed normal blood glucose readings.

Conclusion:

In this patient with type B insulin resistance, Ig treatment and plasmapheresis failed to improve the condition. Finally, treatment with rituximab, cyclophosphamide, and steroids was successful in inducing a complete remission.
INSTITUTIONAL THEORY OF MONEY: THE ESSENCE AND LEGAL STATUS OF MONEY AND SECURITIES
Authors: Грибов Андрей , Gribov Andrey
Published: February 2015

The aim of this study is to deduct and demonstrate current definitions (which are essential for the normal functioning of a country’s financial system) of a security, money, currency and, most importantly, of the rules of circulation for different forms of money and securities.
Modeling the Impacts of Tides and the Virtual Arrival Policy in Berth Allocation
Authors: Du Yuquan , Chen Qiushuang , Lam Jasmine Siu Lee , Xu Ya , Cao Jin Xin
Published: February 2015

To quantify the impacts of tides on seaside operations in container ports, this study reformulates the berth allocation problem by modeling their impacts on the entrance/exit of vessels into/from ports. Furthermore, to mitigate the tidal impacts, we borrow the so-called virtual arrival policy, whose potential for reducing bunker fuel consumption and vessel emissions is widely recognized by the shipping industry, and accordingly retrofit the berth allocation model. In the latter model, the state-of-the-art technique of second-order cone programming is adopted to handle the nonlinear intractability involved. We conduct extensive numerical experiments to evaluate the impacts of tides on the seaside operations in a tidal container port, and also to verify the competence of the virtual arrival policy in delivering win–win economic and environmental benefits for both the port and shipping lines. It is also intriguing to observe that the virtual arrival policy would be an applicable substitute for the costly approach of deepening the navigation channel in a tidal port.
Haemoglobin-based oxygen carriers: indications and future applications
Authors: Njoku Mary , Peter Deidre St , Mackenzie Colin F
Published: February 2015

This article describes current oxygen-carrying solutions, four new products and new indications to increase the benefit/risk ratio of haemoglobin-based oxygen carriers compared to blood. Indications include when blood is not available, if blood is contaminated, is refused or contraindicated, and for organ preservation.
Glial and Perivascular Structures in the Subfornical Organ
Authors: Pócsai Károly , Kálmán Mihály
Published: February 2015

The subfornical organ (SFO) is a circumventricular organ with a chemosensitive function, and its vessels have no blood-brain barrier. Our study investigated the glial and vascular components in the SFO to determine whether their distributions indicate subdivisions, how to characterize the vessels and how to demarcate the SFO. To this end, we investigated glial markers (GFAP, glutamine synthetase, S100) and other markers, including vimentin and nestin (immature glia), laminin (basal lamina), β-dystroglycan (glio-vascular connections), and aquaporin 4 (glial water channels). We determined that the ‘shell’ of the SFO was marked by immunoreactivity for S100, GFAP and aquaporin 4. Nestin immunoreactivity was characteristic of the ‘core’. Vimentin was almost evenly distributed. Glutamine synthetase immunoreactivity occurred in the shell but its expression was sparse. Vessels in the core were decorated with laminin but showed a discontinuous expression of aquaporin 4. Vimentin and GFAP staining was usually in separate glial elements, which may be related to their functional differences. Similar to other vessels in the brain, β-dystroglycan was detected along the shell vessels but laminin was not. The gradual disappearance of the laminin immunopositivity was attributed to the gradual disappearance of the perivascular space. Thus, our findings suggest that the shell and core glio-vascular structures are adapted to different sensory functions: osmoperception and the perception of circulating peptides, respectively.
La dimensión práctica del saber erótico de Sócrates
Authors: Soares Lucas
Published: February 2015

¿Qué es lo que puntualmente sabe Sócrates acerca del amor? ¿Qué dimensiones compromete tal tipo de saber erótico? ¿Cómo se presenta a sí mismo en relación con el amor alguien que al término de su discurso afirma que se ejercita especialmente en los asuntos amorosos e incita a otros a hacerlo (Smp. 212b5-7)? Tales son las preguntas que me propongo desarrollar en el presente trabajo, partiendo de una serie de pasajes tomados de diálogos platónicos tempranos y de transición, y de la Memorabilia y el Banquete de Jenofonte, pasajes a través de los cuales procuro examinar, por un lado, la dimensión práctica (áskesis) comprometida en el saber erótico de Sócrates y, por otro, su vinculación con la dimensión teorética de tal saber cuando éste apunta hacia la Idea de belleza del Banquete.
Análisis del brand placement en las revistas femeninas. Hibridación de discursos: informativo, publicitario y de la moda
Authors: Cristófol Rodríguez Carmen , Méndiz Noguero Alfonso
Published: February 2015

Esta investigación parte de la hipótesis de que el discurso de la moda en las revistas femeninas de alta gama es una hibridación entre el género informativo y el publicitario. Este artículo pretende validar una propuesta de metodología de análisis del brand placement en dicho medio. Basándonos en el concepto de hibridación y product placement como origen del brand placement, realizaremos un análisis de contenido de la muestra seleccionada. Se plantearan cuatro categorías discursivas: publicidad e información como discursos puros; brand placement manifiesto o integrado, en el caso de que exista hibridación. Del resultado de dicho análisis de contenido y teniendo en cuenta las particularidades del discurso de la moda, resultará el debate propuesto y extraeremos las conclusiones finales. En ellas queda refutada parcialmente nuestra hipótesis inicial, confirmando que la moda provoca un contenido discursivo híbrido y que existen dos formas de hibridación o brand placement: manifiesto cuando se observan cambios ortotipográficos o integrado, cuando no existen, pasando de esta manera a ser una fórmula más sutil, si cabe.
Africa’s missed agricultural revolution: a quantitative study of the policy options
Authors: O’Gorman Melanie
Published: February 2015

Despite the widespread diffusion of productivity-enhancing agricultural technologies the world over, agriculture in Sub-Saharan Africa has typically stagnated. This paper develops a quantitative model in order to shed light on the sources of low labor productivity in African agriculture. The model provides a vehicle for understanding the mechanisms leading to low agricultural labor productivity, in particular, how the interactions between factor endowments, government investment and technology adoption may have culminated in agricultural stagnation. I calibrate the model to data for four Sub-Saharan African economies, and use this calibrated model to provide insight into policy aimed at increasing agricultural productivity in these four countries. Policies aimed at improving rural infrastructure or productivity in the non-agricultural sectors, or allowing for land transferability, would be most effective for increasing agricultural labor productivity, and would further bring increases in household welfare for each of the countries I calibrate to.
Performance criteria and quality indicators for the pre-analytical phase
Authors: Plebani Mario , Sciacovelli Laura , Aita Ada , Pelloso Michela , Chiozza Maria Laura
Published: February 2015

The definition, implementation and monitoring of valuable analytical quality specifications have played a fundamental role in improving the quality of laboratory services and reducing the rates of analytical errors. However, a body of evidence has been accumulated on the relevance of the extra-analytical phases, namely the pre-analytical steps, their vulnerability and impact on the overall quality of the laboratory information. The identification and establishment of valueable quality indicators (QIs) represents a promising strategy for collecting data on quality in the total testing process (TTP) and, particularly, for detecting any mistakes made in the individual steps of the pre-analytical phase, thus providing useful information for quality improvement projects. The consensus achieved on the developed list of harmonized QIs is a premise for the further step: the identification of achievable and realistic performance targets based on the knowledge of the state-of-the-art. Data collected by several clinical laboratories worldwide allow the classification of performances for available QIs into three levels: optimum, desirable and minimum, in agreement with the widely accepted proposal for analytical quality specifications.
Practices and perceptions of adolescent girls regarding the impact of dysmenorrhea on their routine life: a comparative study in the urban, rural, and slum areas of Chandigarh
Authors: Rani Alka , Sharma Manoj Kumar , Singh Amarjeet
Published: February 2015

To estimate the prevalence, to compare the impact of dysmenorrhea on routine life among adolescent girls, to compare the practices and perceptions regarding Dysmenorrhea and to ascertain the reason for difference if any, a cross-sectional study was conducted in urban, rural and slum areas of Chandigarh, India. 300 girls in age group of 11–18 years, who had attained menarche were included in the study. A questionnaire including the Demographic and Family profile, menstrual history, Symptoms of Dysmenorrhea, Effect of pain on daily activities, Faces scale, Practices regarding Dysmenorrhea, Beliefs about menstruation was used. Analysis was done by percentage and chi square prevalance of dysmenorrhea was 61.33%. Sickness absenteeism due to dysmenorrhea was reported in 24.45% girls. Most common symptom experienced by the girls was stomach ache which was experienced by 139 girls; others symptoms experienced during menstruation were backache (107), and general body pain (80). Only 11.63% of the girls ever visited physician due to pain during menstruation. During menstruation only 10 girls use hot water bottle, 71 skip meal. Due to poor knowledge the practices were not optimal for pain management, which affected their school attendance. Formal as well as informal channels of communication, such as mothers and peers, need to be emphasized for the delivery of such information particularly linking instructions on menstrual hygiene to an expanded programme of health education in schools.
Control of hypertension and diabetes among adults aged over 40 years with or without physical disabilities
Authors: Lee Jung-A , Park Jong Heon
Published: February 2015

Disabled individuals have poorer health compared to non-disabled individuals and they exhibit a higher prevalence of chronic diseases, such as hypertension (HTN) and diabetes mellitus (DM). We explored how effectively blood pressure (BP) and fasting plasma glucose (FPG) level, factors influencing development of HTN and DM, were controlled in disabled and non-disabled individuals over the age of 40 years. We hypothesized that control of BP and FPG levels in disabled individuals would be lower than that in non-disabled participants.

Records of the National Health Insurance Scheme (NHIS) were analyzed and the health screening program database was examined between the years 2007 and 2009. We identified patients who had used healthcare services to treat HTN or DM. Health-related information that might influence effective control of both BP and FPG levels in those with or without physical disabilities were examined.

The extent of effective BP and DM control did not differ between people with and without disabilities, but plasma glucose levels were slightly better controlled in individuals with disabilities than those without disabilities. HTN and DM control was more closely associated with female gender, age, grade of disability, non-smoking and non-drinker status, engagement in physical activity, presentation for health examinations, and frequent tertiary hospital visits for HTN management.

Our paper is significant because of our focus on differences between disabled and non-disabled individuals. Our results and future data from NHIS health screening programs can be used to regularly monitor population health status and to evaluate information relevant to the management of HTN and DM control.
Standardization of Curing and Microwave Drying of Turmeric (Curcuma longa) Rhizomes
Authors: Gagare Santosh , Mudgal V.D. , Champawat P.S. , Pisal Amit
Published: February 2015

Curing and drying are important unit operations in turmeric processing for production of good quality products. Optimization of the process parameters for curing and microwave drying of turmeric is the need of hour for quality production of dried turmeric. These parameters were optimized by conducting trials for curing (boiling in 0.1% sodium carbonate solution for 15, 30 and 45 min) and microwave drying (power levels of 1, 1.5 and 2 kW). The cured as well as dried rhizomes were evaluated for quality parameters. The optimum boiling time for curing and power level for microwave drying of turmeric rhizomes was found to be 30 min and 1.5 kW for quality production.
Degradation of Vitamin E in Nanoemulsions during Storage as Affected by Temperature, Light and Darkness
Authors: Hategekimana Joseph , Zhong Fang
Published: February 2015

Vitamin E (VE) nanoemulsions confront physical instabilities and chemical degradation during processing and/or storage. Therefore, thermal stability and degradation kinetics of VE in nanoemulsions fabricated using low-energy emulsification method as a function of temperature under light and in the dark were studied. Nanoemulsions had small droplet diameter (≈110 nm). The thermal degradation of VE followed the first-order kinetics with samples heated at 75°C and above presenting the highest degradation rate and short half-life (5.22 min). The degradation of VE in long-term storage fitted the Weibull model with highest degradation in nanoemulsions stored under light at 40°C. However, VE retained in nanoemulsions after certain period of time might be boosted up when nanoemulsions are stored in the dark. Results showed that the physical stability tests alone are not enough to judge the stability of VE delivery systems, as the encapsulated VE might be lost during processing and storage.
Komplexe des Typs [MCl4(SEt2)2] mit M = Mo und W. Kristallstrukturen, NMR-Spektren und magnetisches Verhalten/[MCl4(SEt2)2] Complexes with M = Mo and W. Crystal Structures, NMR Spectra, and Magnetic Behaviour
Authors: Dierkes Peter , Frenzen Gerlinde , Wocadlo Sigrid , Massa Werner , Berger Stefan , Pebler Jürgen , Dehnicke Kurt
Published: February 2015

The crystal structures of the thioether complexes [MCl4(SEt2)2] with M = Mo and W have been solved by X-ray methods. Both compounds crystallize isotypically in the triclinic space group P1̄ with two formula units per cell unit. The metal atoms are octahedrally coordinated by four chlorine atoms and by the two sulfur atoms of the thioether molecules in transposition (symmetry Ci) with bond lengths (average): Mo-Cl 233.1, Mo-S 253.4, W-Cl 233.1, and W-S 251.7 pm. Both complexes were also characterized by 1H and 13C NMR spectroscopy as well as by measurement of the magnetic susceptibilities in the temperature range from 1.8 to 350 K.
Neue Phospha- und Arsa-Heterocyclen aus Cyclophosphanen bzw. -arsanen (ECF3)n (E = P, As; n = 4, 5) und 1,3-Dienen / Novel Phospha- and Arsa-Heterocycles from Cyclophosphanes or -arsanes (ECF3)n (E = P, As; n = 4, 5) and 1,3-Dienes
Authors: Karst Andreas , Broschk Burkhardt , Grobe Joseph , Le Van Duc
Published: February 2015

Reaction of the cyclotetraphosphane (PCF3)4 or of a mixture of (PCF3)4 and (PCF3)5 with 2,3-dimethyl-1,3-butadiene or isoprene at 25 °C leads to the [4 + 2]-cycloadducts of bis(trifluoromethyl) diphosphene and the phospholene derivatives 2a and 2b, respectively, in the molar ratio diphosphinine/phospholene = 1/2. The analogous reactions of the cycloarsanes (AsCF3)4,5 give the Diels/Alder compounds 4 and 5 of bis(trifluoromethyl)diarsene in 90% yield without arsolene formation. Cyclopentadiene, 1,3-cyclohexadiene and cis or trans piperylene do not react with (AsCF3)4,5, up to temperatures of 60 °C. However, the corresponding [4 + 2]-cycloadducts 6 - 8 are produced by irradiation of the reaction mixture with UV light. The novel phospholenes 2a and 2b as well as the diarsinines 4 - 8 have been characterized by spectroscopic data (MS, NMR, IR). 2a was coordinated as a phosphane ligand to the pentacarbonylchromium fragment by reaction with the photochemically generated complex Cr(CO)5 · THF to afford the new compound

(3).
Triferrocenylborane – Molecular Structure in Solution and in the Solid State
Authors: Wrackmeyer Bernd , Dörfler Udo , Milius Wolfgang , Herberhold Max
Published: February 2015

According to a single crystal X-ray structure determination all three ferrocenyl substituents of triferrocenylborane (1) adopt the same orientation with respect to the BC3-plane [P21/c monoclinic; Z = 4; a = 1353.5(3), b = 1695.6(3), c = 1056.4(2) pm, β = 109.27(3)°]. The simulated X-ray powder pattern of the single crystal is identical with the powder diagram of a macroscopic sample, indicating the presence of a single diastereomer (1a) in the solid state. However, at low temperature (< - 95 °C) in solution, the 13C NMR spectra suggest the presence of the second diastereomer (1b) in which one ferrocenyl group is oriented opposite to the other two with respect to the central BC3-plane.
Synthese und Kristallstruktur von Tribrommethyltriphenylphosphonium-bromid und Bis(tribrommethyltriphenylphosphonium)-tribroniid-bromid / Synthesis and Crystal Structure of Tribromomethyltriphenylphosphonium Bromide and Bis(tribromomethyltriphenylphosphonium) Tribromide Bromide
Authors: Vogt H. , Frauendorf C. , Fischer A. , Jones P. G.
Published: February 2015

Tribromotriphenylphosphonium bromide 1 has been prepared by the reaction of triphenylphosphine with tetrabromomethane in dichloromethane. Colourless crystals were obtained by recrystallization from the same solvent. The light-sensitive crystals change colour to yellow. The crystals are triclinic, space group P1̄ , Z = 4, a = 1008.6(5), b = 1357.8(6), c = 1560.7(7) pm, α = 106.61(4), β = 91.80(4), γ = 93.88(4)°. In the solid state there are discrete monomeric (C6H5)3PCBr3
+ cations and Br- anions. The cation has a slightly irregular tetrahedral geometry around the P atom. The crystals contain one molecule CH2C12 per four molecules (C6H5)3PCBr4.

Bis(tribromomethyltriphenylphosphonium) tribromide bromide 2 can be obtained as a byproduct of the reaction of (C6H5)3P with CBr4 by variation of the reaction conditions. Red light-stable crystals are obtained by recrystallization from CH2C12. The crystals are monoclinic, space group C2/c, Z = 8, a = 2231.5(7), b = 1532.7(7), c = 1556.9(6) pm, β = 129.69(2)°. In the solid state bis(tribromomethyltriphenylphosphonium) tribromide bromide exists as discrete monomeric (C6H5)3PCBr3
+ cations and Br- and Br3
- anions. The Br anion and the central Br of Br3
- anion lie on crystallographic twofold axes. The cation has also a slightly irregular tetrahedral geometry around the P atom, with a long P-CBr3 bond.
P–H-funktionelle Zirkonocen-Phosphido-Komplexe – Synthese von Cpʹ2Zr{PH(2,4,6-Pri
3C6H2)}(X) (Cpʹ = C5H4Me, X = Cl, 2,4,6-Pri
3C6H2) und Molekülstruktur von Cpʹ2ZrCl{PH(2,4,6-Pri
3C6H2)} / P–H -Functionalized Zirconocene Phosphido Complexes - Synthesis of Cpʹ2Zr{PH(2,4,6-Pri
3C6H2)}(X) (Cpʹ = C5H4Me, X = Cl, 2,4,6-Pri
3C6H2) and Molecular Structure of Cpʹ2ZrCl{PH(2,4,6-Pri
3C6H2)}
Authors: Hey-Hawkins Evamarie , Kurz Stefan , Baum Gerhard
Published: February 2015

The reaction of Cpʹ2ZrCl2 (Cpʹ = C5H4Me) with solvent-free LiPH(2,4,6-Pri
3C6H2) yields the terminal zirconocene phosphido complexes Cpʹ2ZrCl{PH(2,4,6-Pri
3C6H2)} (1) (1:1 reaction) or Cpʹ2Zr{PH(2,4,6-Pri
3C6H2)}2 (2) (1:2 reaction). 1 and 2 were characterized spectroscopically (NMR, IR, MS). An X-ray structure determination was carried out on 1 (Zr - P 2.6381(8) Å, Zr - Cl 2.4547(6) Å , Cl - Zr - P 93.55(2)°).
Synthese und Kristallstruktur von (Cu,Zn)3,75Mo3O12 / Synthesis and Crystal Structure of (Cu,Zn)3,75Mo3O12
Authors: Szillat H. , Müller-Buschbaum Hk.
Published: February 2015

Single crystals of (Cu,Zn)3,75Mo3O12 have been prepared by crystallization from melts and investigated by X-ray diffractometer techniques. (Cu,Zn)3,75Mo3O12 crystallizes orthorhombically, space group D2
4-P212121, Z = 4, a = 17.947(9), b = 5.092(3), c = 10.685(5) Å. It is isotypic to Cu3,85Mo3O12. All molybdenum atoms are tetrahedrally coordinated by oxygen atoms. There are layers of CuO6 and ZnO6 octahedra, while other metal sites are occupied by copper in a deformed prismatic coordination with one oxygen atom at a remarkably greater distance from copper than the other five. Some of the zinc atoms occupy positions in chains of face-sharing octahedra with an occupancy factor of 0.75. The crystal structure is discussed with respect to the isotypic compound Cu3,85Mo3O12 and compounds of the type CuLnMo2O8.
Zur Kristallchemie eines neuen Oxomolybdats: Cu2YbMo3O12/On the Crystal Chemistry of a New Molybdenum Oxide: Cu2YbMo3O12
Authors: Szillat H. , Müller-Buschbaum Hk.
Published: February 2015

Single crystals of Cu2YbMo3O12 have been prepared by crystallization from melts and investigated by X-ray diffractometer techniques. Cu2YbMo3O12 crystallizes with monoclinic symmetry (space group C2h
2 - P121/m 1, a = 5.162(2), b = 10.885(4), c = 8.699(4) Å. β = 95.73(7)°, Z = 2), forming a new structure type. Typical features are layers of CuO6 octahedra, connected via corners and edges. These layers are linked by molybdenum and ytterbium ions along [001]. The crystal structure as well as the coordination of copper, ytterbium and molybdenum and the oxidation states of copper and molybdenum are discussed with respect to the related but not isotypic compound (Cu,Zn)3,75Mo3O12.
Metallkomplexe mit biologisch wichtigen Liganden, LXXV. Synthese metallorganischer Cobalt(III)-, Iridium(III)- und Ruthenium(II)-Komplexe mit α-Iminocarboxylat-Liganden Metal Complexes of Biologically Important Ligands, LXXV. Synthesis of Organometallic Cobalt(III), Iridium(III) and Ruthenium(II) Complexes with α-Iminocarboxylate Ligands
Authors: Severin Kay , Bergs Ralph , Maurus Michael , Mihan Sharam , Beck Wolfgang
Published: February 2015

The α-iminocarboxylato chelate complexes RuH(CO)[OOC-C(R1)=N-R2](PPh3)2 (1), η6-p-cymene)RuCl[OOC-C(R)=N-CH2CO2Me] (3) and Cp*CoI[OOC-C(R1)= N-R2] (4) have been obtained from RuHCl(CO)(PPh3)3, [(η6-p-cymene)RuCl2] and Cp*Co(CO)I2, respectively and 2-oxocarboxylate/amine. The structure of (η6-p-cymene)RuCl[OOC-C(CH3)= N-CH2CO2Me] (3a) has been determined by X-ray diffraction. By use of diamines the corresponding dinuclear cobalt and iridium complexes (5, 6) are formed from 2-oxocarboxylate and Cp*Co(CO)I2 or [Cp*IrCl2]2.
Synthesis of Novel Oxazolo(4,5-a)carbazoles
Authors: Sekar M. , Rajendra Prasad K. J.
Published: February 2015

1-Hydroxyimino-1,2,3,4-tetrahydrocarbazoles, 1a - e on treatment with acetyl chloride at room temperature afforded the corresponding novel oxazolo(4,5-a)carbazole derivatives 2a - e respectively.
Asymmetrische Synthesen durch Substitution: Diastereomere Arsinite aus homochiral substituierten Arsoniten / Asymmetrie Synthesis via Substitution: Diastereomeric Arsinites from Homochirally Substituted Arsonites
Authors: Richter Wolf Jürgen
Published: February 2015

Conceptually novel access to chiral arsinites is provided by reacting phenyl-O,O-dimenthylarsonite (1) with bulky nucleophiles e. g. tert-butyl-lithium or iso-propyl-lithium to yield the arsinites 3 and 4. The asymmetric induction determined by GC and NMR is 50% and 30% d.e. A small nucleophile effects double substitution.
Carbon-Carbon Bond Formation by Reductive Coupling with Titanium(II) Chloride Bis(tetrahydrofuran)
Authors: Eisch John J. , Shi Xian , Lasota Jacek
Published: February 2015

Titanium(II) bis(tetrahydrofuran) 1, generated by the treatm ent of TiCl4 in THF with two equivalents of n-butyllithium at -78 °C, has been found to form carbon-carbon bonds with a variety of organic substrates by reductive coupling. Diphenylacetylene is dimerized to exclusively (E,E)-1,2,3,4-tetraphenyl-1,3-butadiene; benzyl bromide and 9-bromofluorene give their coupled products, bibenzyl and 9,9'-bifluorenyl, as do benzal chloride and benzotrichloride yield the 1,2-dichloro-1,2-diphenylethanes and 1,1,2,2-tetrachloro-1,2-diphenylethane, respectively. Styrene oxide and and cis-stilbene oxide undergo deoxygenation to styrene and fra/«-stilbene, while benzyl alcohol and benzopinacol are coupled to bibenzyl and to a mixture of tetraphenylethylene and 1,1,2,2-tetraphenylethane. Both aliphatic and aromatic ketones are smoothly reductively coupled to a mixture of pinacols and/or olefins in varying proportions. By a choice of experimental conditions either the pinacol or the olefin could be made the predom inant product in certain cases. The reaction has been carried out with heptanal, cyclohexanone, benzonitrile, benzaldehyde, furfural, acetophenone, benzophenone and 9-fluorenone. In a remarkable, multiple reductive coupling, benzoyl chloride is converted into 2,3,4,5-tetraphenylfuran in almost 50% yield. The stereochemical course of two such couplings, that of diphenylacetylene to yield exclusively (E,E)-1,2,3,4-tetraphenyl-l,3-butadiene and that of acetophenone to produce only racemic-2,3-diphenyl-2,3-butanediol, is interpreted to conclude that the couplings proceed via two electron transfer pathways (TET) involving titanium (IV) cyclic intermediates of the titanirene and the oxatitanacyclopropane type, respectively.
Trithioorthoesters and Tetrathioorthocarbonates as RC3+ and C4+ Synthons. Nickel-Catalyzed Alkylative Olefination of Trithioorthoesters and Tetrathioorthocarbonates
Authors: Tzeng Yih-Ling , Cheng Wen-Lung , Luh Tien-Yau
Published: February 2015

NiCl2(PPh3)2-catalyzed alkylative olefinations of trithioorthoesters and tetrathioorthocarbonates give the corresponding substituted alkenes. Aliphatic C - S bonds in these substrates can be activated in the nickel-catalyzed cross coupling reaction leading to carbon - carbon bond formation. This reaction can be considered as using trithioorthoesters and tetrathioorthocarbonate as R3C3+ and C4+ synthons.
Ethen/1-Hexen- und 1-Octadecen-Copolymerisation mit dem stereorigiden Zirkon-Katalysatorsystem iPr(CpFlu)ZrCl2/MAO: Einfluß der Temperatur / Copolym erization of Ethene/1-Hexene and 1-Oetadecen with the Stereorigid Zirconium Catalyst System iPr(CpFlu)ZrCl2/MAO : Influence of the Temperature
Authors: Mühlenbrock Peter H. , Fink Gerhard
Published: February 2015

Ethene was copolymerized with 1-hexene and 1-octadecene at different temperatures to study the influence of the temperature. The stereorigid catalyst [2,4-cyclopentadien-1-yliden- (iso-propyliden)fluoren-9-yliden]zirconium dichloride iPr(CpFlu )ZrCl2 1 in combination with methylalumoxane MAO was used. The polymerization rate of ethene depends in a wide range on the temperature and the com onom er content in solution. In each case a large rate enhancem ent at low ratios [com onom er]/[ethene] was observed. A t 25 °C the polymerization rate of ethene increases continuously with increasing [1-hexene]/[ethene]-ratio. At 40 °C the consumption of ethene is nearly independent of the 1-hexene content in solution. Finally, at 60 °C, similar to the ethene/1-octadecene-copolymerisation at different temperatures, the polymerization rate of ethene decreases with increasing [1-hexene]/[ethene]-ratio. It is suggested that this behavior is caused by the mobility of the side chains in the copolym er near the active center, probably for sterical reasons. W ith increasing temperatures, the side chain becomes more and more flexible and thus the sterical hindrance is increased. This effect is even stronger with long chain α-olefins.

The microstructure of the copolymer was investigated with respect to Marcovian statistic 1. and 2. order. The experimental triad distribution is described satisfactorily only with the second order statistic. Independent of the temperature the r22 parameter is considerably greater than the r12 parameter, the insertion of an α-olefin thus being more favored for he sequence {R -(α-olefine)-(α-olefine)-Kat.} than for {R -(ethene)-(α-olefine)-Kat.}. It therefore appears that both last inserted monomers influence the insertion of the subsequent monomer, especially at high comonomer contents. Furthermore, the parameters for the α-olefin insertions r22 and r12 are nearly independent of the temperature of polymerization, whereas the r11 and r21 parameters increase with increasing temperature.
Oxidative Abbaureaktionen des homonuklearen Cobalthydridclusters [(η5-Cp*)Co]3H4 / Oxidative Degradation Reactions of the Homonuclear Cobalt Hydride Cluster [(η5-Cp*)Co]3H4
Authors: Schneider Jörg J. , Goddard Richard , Krüger Carl
Published: February 2015

The homonuclear cobalt cluster [(η5-Cp*)Co]3H4 2 reacts with various organic and inorganic substrates with complete degradation of the cluster core to afford mainly mononuclear organometallic cobalt compounds. Thus, whereas reaction of the cluster with CO, NO or alkynes results in the retention of the Co3 ring, the cluster reacts with Br2, I2, I2/CO , I2/ P(C 2H5)3, CCl4, HCI3, (CH2)2Br2, Hacac, CH2Br2, (C6H5CO)OOC(CH3)3, HBF4, and BrCN to give mononuclear complexes or bridged dinuclear complexes without a metal-metal bond. In all cases formal oxidation of the metal center is observed. The crystal structures of six organocobalt complexes have been determined by X-ray crystallography.
The Stability and Structure of Complex Species Formed in Equilibrium Reactions of Diethyltin(IV) with N-D-Gluconylamino Acids in Aqueous Solution
Authors: Gyurcsik B. , Buzás N. , Gajda T. , Nagy L. , Kuzmann E. , Vértes A. , Burger K.
Published: February 2015

Complex formation equilibria of diethyltin(IV) with five N-D-gluconylamino acids in aqueous solution (I = 0.1 M, NaClO4) were studied and the stabilities of the species were determined by potentiometric titrations. Diethyltin(IV) complexes of α-amino acid derivatives are water-soluble in the physiological pH range, while in the presence of N-D-gluconyl-β-alanine a precipitate is formed, which dissolves with increasing pH. 13C NMR measurements showed that in the N-D-gluconyl-α-amino acid complexes the ligand is coordinated through its deprotonated carboxylate oxygen, amide nitrogen and C(2)-hydroxy group, while for the soluble N-D-gluconyl-β-alanine complex the ligand is coordinated via the deprotonated carboxylate and C(3)-, C(4)-, C(5)-hydroxy groups. Mössbauer measurements reflected the geometry of the complexes formed.
A Novel Triterpene Saponin from Gypsophila capillaris
Authors: Elgamal M. Hani A. , Soliman Hesham S. M. , Duddeck Helmut , Mikhova Bozhana , Gartmann Martin
Published: February 2015

A novel C-28 tetraglycoside of quillaic acid (1) has been isolated from Gypsophila capillaris. The structure was elucidated by 1 D NMR (NOE difference, DEPT, selective 13C{1H} INEPT), 2D NMR ( 1H,1H and 1H,13C COSY, 1H,1H,1H RELAY, ROESY and TOCSY) and other spectroscopic and chromatographic evidences. Conformational dynamics within the tetrasaccharide part were estimated from NOE responses and ROESY peaks.
Über das gemischte Alkali-Erdalkalimetall-Oxoruthenat NaSr3RuO6 / The Mixed Alkaline Alkaline Earth Oxoruthenate NaSr3RuO6
Authors: Frenzen S. , Müller-Buschbaum Hk.
Published: February 2015

Single crystals of NaSr3RuO6 have been prepared in closed silver tubes and investigated by X-ray techniques. This compound crystallizes with trigonal (rhombohedral) symmetry, space group D6
3d - R3̅c , a = 9.6069(8), c = 11.513(2) Å, Z = 6, and is isotypic to compounds of the Sr4PtO6 type. The crystal structure is discussed with respect to related compounds with partial replacement of alkaline earth elem ents by sodium and copper.
A Synthetic Pathway to Arylsilyl(silyl)arenes; Selective Si-C Cleavage in Bis(arylsilyl)arenes with Triflic Acid
Authors: Schröck Robert , Angermaier Klaus , Schmidbaur Hubert
Published: February 2015

Bis(arylsilyl)arenes such as bis(p-tolylsilyl)benzene and bis(p-anisylsilyl)naphthalene are available from in situ Grignard reactions of the corresponding haloarenes, arylchlorosilanes and magnesium in tetrahydrofuran. Treatment of these products with one equivalent of trifluoromethanesulfonic (triflic) acid at low temperatures leads to arylsilyl(trifluoromethylsulfonatosilyl) arenes, which can be converted into arylsilyl(silyl)arenes using LiAlH4. The regioselectivity of the Si - C cleavage is surprisingly high. Any of the first dearylation steps is faster then the consecutive steps. Ortho, meta and para substituted p-tolylsilyl(silyl)benzenes, 1,4-dibromo-2-(p-tolylsilyl)-5-(silyl)benzene, and 1-(p-anisylsilyl)-8-(silyl)naphthalene have thus been obtained in good to moderate yields. These compounds can serve as starting materials for monofunctional arylsilanes with a tailored structure. The crystal structure of 1-(p-anisylsiIyI)-8-(siIyl)naphthalene has been determined by single crystal X-ray diffraction.
CaMg2N2 – ein gemischtes Erdalkalimetallnitrid mit anti-La2O3-Struktur / CaMg2N2 – a Mixed Alkaline-Earth Metal Nitride with anti-La2O3 Structure
Authors: Schultz-Coulon Verena , Schnick Wolfgang
Published: February 2015

CaMg2N2 (trigonal, P3̄ m 1 (Nr. 164); a = 354.046(1), c = 609.079(2) pm; Z = 1) is isotypic to the anti-La2O3 structure with octahedral and tetrahedral coordination for Ca2+ and Mg2+ ions, respectively. The compound has been prepared by the reaction o f the binary nitrides Ca3N2 and Mg3N2 (molar ratio 1:2) in a tungsten crucible under a pure nitrogen atmosphere at 1050 °C. The formation of the solid CaMg2N2 may be interpreted in analogy to reactions o f related oxides as an acid-base reaction between the binary nitrides with different coordination tendencies of Ca2+ and Mg2+ ions. An analysis of the binary aristotype anti-La2O3 indicates that this structure is predisposed for building ternary phases.
CuTm2[B2O5]2: Das erste „Metaborat“ mit einem 2
∞[B2O5]4- -Anion / CuTm2[B2O5]2: The First “ Metaborate” with a 2
∞[B2O5]4- -Anion
Authors: Schaefer Jan , Bluhm Karsten
Published: February 2015

Single crystals of the compound CuTm2[B2O3]2 were obtained by a B2O3 flux technique. The compound contains a hitherto unknown metaborate anion with the formula 2
∞[B2O5]4-. It crystallizes in the monoclinic space group C5
2h - P21/c with a = 452.18(7); b = 720.0(2); c = 929.2(5) pm; β = 90.16(5)°; Z = 2. The metaborate layers consists of four and eight membered rings of edge-sharing BO4-tetrahedra resembling the complex anion in the isotypic gadolinite structure of FeY2[BeSiO3]2. The layers are connected via copper-centered elongated oxygen octahedra and slightly distorted thulium-centered tetragonal oxygen antiprisms.
Photoreaktionen von Dekacarbonyldirhenium mit Allen und unverzweigten Allenderivaten / Photoreactions of Decacarbonyldirhenium with Allene and Unbranched Derivatives of Allene
Authors: Kreiter Cornelius G. , Michels Wolfgang , Heeb Gerhard
Published: February 2015

Decacarbonyldirhenium (1) reacts upon UV irradiation with allene (2), 1,2-butadiene (3) and 2,3-pentadiene (4) preferentially by CO substitution and oxidative rearrangement to the corresponding enneacarbonyl-μ-η1:3-endiyl-dirhenium complexes 5, 9, and 15 and to the octacarbonyl-μ-η2:2-allene-dirhenium complexes 6, the stereoisomers 10, 11, and 16. At elevated temperature 5, 9, and 15 loose CO and yield by a reductive rearrangement also the complexes 6, 10, 11, and 16. In addition to these main products, depending upon the allene derivative used, various by-products are obtained.

By-products of the reaction o f 1 with 2 are octacarbonyl-μ-η3:3-(2,3-dimethylene-buta-1,4- diyl)dirhenium (7) and μ-η2:2-allene-hexacarbonyl-μ-η1:3-1-propene-1,3-diyl-dirheniurn (8). The photo reaction of 1 with 3 yields, in addition to 9-11, tetracarbonyl-η3-(E-5-ethylidene- 4-methyl-2-cyclopenten-1-yl)rhenium (12) and tetracarbonyl-η3-(Z-5-ethyliden-4- methyl-2-cyclopenten-1-yl)rhenium (13) as a mixture of isomers. 1 and 4 form the by-products tetracarbonyl-η3-(EZ-3-penten-2-yl)rhenium (17), tetracarbonyl-η3-(EE-3-penten-2-yl)rhenium (18) and heptacarbonyl-μ-η1:2:1:2-(4,5-dimethyl-2,6-octadiene-3,6-diyl)dirhenium (19) with an unusually bridging and chelating ligand. The constitutions of the reaction products have been concluded from the IR and 1H NMR spectra. For 19 the crystal and molecular structure has been determined by X-ray diffraction analysis.
Notizen: The Crystal Structure of [Et4N]2
2+[TeI6]2-, a Tetraalkyl Ammonium Salt Containing a Discrete Octahedral [TeI6]2- Anion
Authors: Srivastava P. C. , Schmidt H.-G. , Roesky H. W.
Published: February 2015

The structure of [Et4N]2
2+[TeI6]2-, the first tetraalkyl ammonium salt to contain the almost regular octahedron of a discrete [TeI6]2- anion, has been determined by single crystal X-ray diffraction studies. It crystallizes in the monoclinic space group C2/c with a = 18.757(3), b = 11.578(2), c = 15.447(2) Å, β = 109.380(10)°. The [TeI6]2- anion has Te - I bond distances in the range of 2.845 to 2.948 Å and I - Te - I bond angles in the range of 89(1) to 90.1(1)°.
Notizen: Solid State Structure of N,N-Dibenzylhydroxylamine
Authors: Mitzel Norbert W. , Riede Jürgen , Angermaier Klaus , Schmidbaur Hubert
Published: February 2015

The solid-state structure of N,N-dibenzylhydroxylamine (1) has been determined by single crystal X-ray diffraction. The compound crystallizes in the monoclinic space group P 21/n with four formula units in the unit cell. N,N-dibenzylhydroxylamine dimerizes to give N2O2H2 sixmembered rings as a result of the formation of two hydrogen bonds O - H ··· N in the solid state.
Darstellung und Kristallstruktur von [Cs4(Dibenzo-18-Krone-6)3](S6)2·2CH3CN / Synthesis and Crystal Structure of [Cs4(Dibenzo-18-Krone-6)3](S6)2·2CH3CN
Authors: Böttcher P. , Schnock M.
Published: February 2015

[Cs4(dibenzo-18-crown-6)3](S6)2·2CH3CN has been prepared from dibenzo-18-crown-6, Cs2CO3 and suifur in acetonitrile saturated with H2S. The title compound crystallizes in space group P 1̄ (lattice dimensions: a = 10,507(7) Å, b = 11,504(6) Å, c = 17,792(9) Å, α = 97,86(4)°, β = 105,86(4)°, γ = 101,48(5)°) with one formula unit. The crystallographic units are built of stacks of three crown ether molecules and two hexasulfide chains with the cations located between them. The conformation of the hexasulfide chains is all-cis.
Tetramesityldibismutan, Bis(dimesitylbismut)- und Bis(dimethylbismut)chalkogenide / Tetramesityldibismuthane, Bis(dimesitylbismuth)- and Bis(dimethylbismuth)chalcogenides
Authors: Breunig Hans Joachim , Ebert Klaus Heinz , Schulz Reinhold Ernst , Wieber Markus , Sauer Ingbert
Published: February 2015

Reduction of Mes2BiBr with Na in liquid NH3 or with Cp2Co in THF or C6D6 gives Mes4Bi2 (1) as a red solid that reversibly becomes pink on cooling with liquid nitrogen. Oxidation of 1 in air, or reaction of Mes2BiBr with NaOH, gives (Mes2Bi)2O (2). (Mes2Bi)2S (3) and (Mes2Bi)2Se (4) are formed by reaction of Mes2BiBr with Na2S in water or with Na2Se in liquid NH3, respectively. (Mes2Bi)2Te (5) is obtained by reaction of 1 with Te or by reaction of Mes2BiBr with Na2Te. Reactions of Me4Bi2 with Se or Te produce (Me2Bi)2Se (6) and (Me2Bi)2Te (7). With equimolar amounts of p-benzoquinone tetramethyldibismuthane yields 1,4-C6H4(OBiMe2)2 (8). 1H NMR data and mass spectra of 1-8, UV-VIS data of 1-4, and the crystal structures of 2·0,5C2H5OH, 3 and 4 are reported.
Synthesis and Vibrational and Mass Spectra of (n-Bu)2Sn(O2PMe2)2, (n-Bu)2Sn(O2PMePh)2 and (n-Bu)2Sn(O2PPh2)2
Authors: Shihada Abdel-Fattah
Published: February 2015

Di-n-butyltin dimethylphosphinate has been synthesized by the reaction of (n-Bu)2Sn(OCOCH3)2 with HO2PMe2 in benzene. The ractions of (n-Bu)2Sn(OCOCH3)2 with MePhPOCl and Ph2POCl in toluene have been used to prepare (n-Bu)2Sn(O2PMePh)2 and (n-Bu)2Sn(O2PPh2)2 respectively. On the basis of vibrational spectra and physical properties it is conclu ded that the title compounds are polymerized and the ligands function as O-P-O bridges between the tin atoms. The n-butyl groups are in trans position in the resulting octahedral environment around tin. Loss of n-butyl radicals and of the diorganophosphinate group from tin represent the main fragmentation processes in the El mass spectra of (n-Bu)2Sn(O2PRR′)2(RR′=Me2, MePh, Ph2). The mass spectra show Sn(O2PRR′)+ as the base peak.
Darstellung, 11B-NMR- und Schwingungsspektren mehrfach alkylierter closo-Hexaborate und Kristallstruktur von cis- und trans-[P(C6H5)4][B6H5(CH3)2] sowie mer-[P(C6H5)4][B6H4(CH3)3] / Preparation, 11B NMR and Vibrational Spectra of Multialkylated Hexaborates and Crystal Structures of cis- and trans-[P(C6H5)4][B6H5(CH3)2] and mer-[P(C6H5)4][B6H4(CH3)3]
Authors: Baurmeister J. , Franken A. , Preetz W.
Published: February 2015

By treatment of protonated monoalkyl-closo-hexaborates [B6H6R]-. R = CH3, C2H5, n-C3H7, i-C3H7 in aqueous alkaline solution with [As(C6H5)4]Cl the yellow orange deprotonated tetraphenylarsonium salts are precipitated, which react with methyl iodide or ethyl iodide to give dialkylated and protonated B6-compounds. The cisltrans isomers formed in a 1:1 ratio have been separated by ion exchange chromatography on diethylam inoethyl cellulose. Repeated deprotonation and reaction with methyl iodide affords mer-[B6H4 (CH3)3]-. The crystal structures of cis-[P(C6H5)4][B6H5(CH3)2] (I), trans-[P(C6H5)4][B6H5(CH3)2] (II) and mer-[P(C6H5)4][B6H4(CH3)3](III) have been determined by single crystal X-ray diffraction analyses; I and II are monoclinic, space group P2/n, I with a = 11.8690(5), b = 7.2575(7), c = 15.8689(3) Å , β = 111.454(17)°; II with a = 13.2853(7), b = 7.4608(8), c = 13.3549(11), β = 93.5(11); III is tetragonal, space group P4/n with a = 13.363(2), c = 7.5051(13). The three methyl substituents are statistically distributed over four equatorial positions of the B6 cage. The 11B NMR spectra of the di- and trialkylated com pounds exhibit shifts of ipso-B atoms to lower, of antipodal-B atoms to higher field compared with [B6H7]-. The IR and Raman spectra of the di- and trimethyl derivatives are similar to those of monom ethylhexaborate.
Darstellung, 11B-NMR- und Schwingungsspektren von μ-Distickstoff-bis(pentahydro-closo-hexaborat)(2-), [B6H5(NN)B6H5]2-sowie Kristallstruktur von [As(C6H5)4]2[B6H5(NN)B6H5] / Preparation, 11B NMR and Vibrational Spectra of μ-Dinitrogen-bis(pentahydro-closo-hexaborate)(2-), [B6H5(NN)B6H5]2 and the Crystal Structure of [As(C6H5)4]2[B6H5(NN)B6H5]
Authors: Franken A. , Preetz W.
Published: February 2015

By reduction of [B6H5(NO2)]2- with aluminium powder in aqueous alkaline solution the orange μ-dinitrogen-bis(pentahydro-closo-hexaborate)(2-), [B6H5(NN)B6H5]2-, is formed, which can be precipitated with tetraphenylarsonium ions. The crystal structure of [As(C6H5)4]2[B6H5(NN)B6H5] has been determined by single crystal X-ray diffraction analy­sis; tetragonal, space group P4/n with a = 12.6610(12), c = 14.6790(11) Å. The B6 cages are slightly compressed (2%) in the direction of the connecting linear N2 bridge with bond lengths N-N of 1.129 and B-N of 1.421 Å. The 11B NMR spectrum exhibits signals at -27.0 (ipso-B), +1.26 (equatorial-B), +3.54 ppm (antipodal-B atoms). The NN stretching vibration is observed in the Raman spectra as a very strong line at 2065 cm-1.
Beiträge zur Chemie des Phosphors, 234 [1,2] Lithium-tetrahydrogencyclopentaphosphid: Synthese, Struktur und Reaktionen / Contributions to the Chemistry of Phosphorus, 234 [1,2] Lithium Tetrahydrogen Cyclopentaphosphide: Synthesis, Structure and Reactions
Authors: Baudler Marianne , Heumüller Rudolf , Faber Wolfgang
Published: February 2015

Lithium tetrahydrogen cyclopentaphosphide. LiH4P5 (I). has been obtained by metalation of P2H4 at -78 °C with either n-BuLi or LiPH2 in polar solvents. Upon suitable performance of the reaction, compound I can be isolated at low temperature as a lemon-yellow solvent adduct. The structure as the monolithium salt of (PH)5 was confirmed by a complete analysis of the 31P{1H}-NMR spectrum. On warming above -35 °C, disproportionation occurs yield­ing Li2HP7. P2H4. and PH3. The reaction with n-BuLi produces the open-chain phosphides LiH4P3. LiH3P2, and LiPH2. The NMR parameters of LiH3P2 and LiH4P3 are reported. Reac­tion of 1 with P2H4 gives rise to the bicyclic and polycyclic phosphides LiH4P7, LiH5P8 and Li2H2P14, respectively.