bluuebunny/crossref_metadata_2025_split huggingface dataset:
Syntheses and Crystal Structures of Lanthanide Chloride Complexes with Diglyme
Authors: Petriček Saša 
Published: December 2007

AbstractReactions of [LnCl3(DME)2] (Ln = Nd, Sm, Ho, Lu; DME = dimethoxyethane) and diglyme (diglyme = diethylen glycol dimethyl ether) in THF resulted in polymeric [LnCl3(diglyme)]n (Ln = Nd (1), Sm (2)) or mononuclear complexes [LnCl3(diglyme)(THF)] (Ln = Ho (3), Lu (4)). Neodymium and samarium atoms in 1 and 2 are eight‐coordinated by three oxygen atoms from diglyme, one terminal and four bridging chloride ions. Holmium and lutetium atoms in 3 and 4 are seven‐coordinated by three oxygen atoms from diglyme, three chloride ions and one oxygen atom from THF. [ErCl3(diglyme)(H2O)] (5) resulted from the reaction of ErCl3·6H2O, (CH3)3SiCl and diglyme in THF. The molecular structures of 3, 4 and 5 are similar, with either a molecule of THF coordinated to the lanthanide atom in 3 and 4 or with a molecule of water coordinated in 5.
Synthesis and Magnetic Properties of Novel Azamacrocyclic LnIII, CuII, FeIII, and SrII Complexes and Conformational Analysis of the Ligands
Authors: Judele Roxana , Dix Michael J. , Laschat Sabine , Baro Angelika , Nimtz Manfred , Menzel Dirk , Schoenes Joachim , Doll Klaus , Zwicknagl Gertrud , Niemeyer Mark 
Published: December 2007

AbstractHexaalkoxy‐substituted azamacrocyclic metal complexes 1 · MXn [MXn = FeCl3, CuCl2, SrCl2, Ln(NO3)3; Ln = La, Pr, Eu, Ho, Er] with various chain lengths were prepared by a convergent approach using 1,2‐bisalkoxy‐4,5‐diamines 3 and 4‐alkoxy‐pyridine‐2,6‐dicarbaldehydes 4 as key building blocks for template‐assisted cyclocondensation. Metal complexes 1 · MXn were considered as potential metallomesogens. However, differential scanning calorimetry and optical polarizing microscopy of 1 · MXn did not reveal any mesomorphism. The magnetic susceptibility shows deviation from Curie‐like behavior. Due to ligand field effects the effective magnetic moments are a function of the temperature. In order to obtain structural informations on the free ligand 1, which is synthetically not accessible, theoretical calculations were carried out. For the free azamacrocycle 2a and the free hexamethoxy‐substituted azamacrocycle 1a the IR spectra were computed at the level of density functional theory. A planar and a saddle‐shaped conformation was considered. The IR spectra and especially the dependence of the C=N vibration on the structural parameters and the charge distribution are discussed.
A Novel Two‐Dimensional Cadmium Polymeric Aminonaphthalene Sulfonate and its Application in the Synthesis of CdS Materials
Authors: Mi Li‐Wei , Han Min‐Le , Li Da‐Peng , Chen Wei‐Hua , Zheng Zhi 
Published: December 2007

AbstractA new mixed‐ligand complex, [CdL(bipy)(CH3OH)(NO3)]n (1), (HL = 4‐amino‐1‐naphthalene sulfonic acid and bipy = 4,4′‐bipyridine) could be achieved by combining d10 Cd2+ to HL and bridging ligand 4,4′‐bipy. The structure is characterized by X‐ray single‐crystal diffraction. 4‐amino‐1‐naphthalene sulfonate and 4,4′‐bipyridine act as bridging ligands, linking two adjacent CdII atom to form a two‐dimensional coordination polymer, respectively. N‐H···O hydrogen‐bonding interaction between these networks to form the face‐to‐face three‐dimensional architecture. By carrying out the reaction of polymeric cadmium naphthalene sulfonate with Na2S in the presence of sodium hydroxide, scalelike CdS materials have been obtained. The structure has been characterized by scanning electron microscopy and powder X‐ray diffraction.
Zu den Kristallstrukturen der Übergangsmetall(II)‐Dodekahydro‐closo‐Dodekaborat‐Hydrate Cu(H2O)5,5[B12H12]·2,5 H2O und Zn(H2O)6[B12H12]·6 H2O
Authors: Tiritiris Ioannis , Schleid Thomas 
Published: December 2007

AbstractOn the Crystal Structures of the Transition‐Metal(II) Dodecahydro‐closo‐Dodecaborate Hydrates Cu(H2O)5.5[B12H12]·2.5 H2O and Zn(H2O)6[B12H12]·6 H2OBy neutralization of an aqueous solution of the free acid (H3O)2[B12H12] with basic copper(II) carbonate or zinc carbonate, blue lath‐shaped single crystals of the octahydrate Cu[B12H12]·8 H2O (≡ Cu(H2O)5.5[B12H12]·2.5 H2O) and colourless face‐rich single crystals of the dodecahydrate Zn[B12H12]·12 H2O (≡ Zn(H2O)6[B12H12]·6 H2O) could be isolated after isothermic evaporation. Copper(II) dodecahydro‐closo‐dodecaborate octahydrate crystallizes at room temperature in the monoclinic system with the non‐centrosymmetric space group Pm (Cu(H2O)5.5[B12H12]·2.5 H2O: a = 768.23(5), b = 1434.48(9), c = 777.31(5) pm, β = 90.894(6)°; Z = 2), whereas zinc dodecahydro‐closo‐dodecaborate dodecahydrate crystallizes cubic in the likewise non‐centrosymmetric space group F23 (Zn(H2O)6[B12H12]·6 H2O: a = 1637.43(9) pm; Z = 8). The crystal structure of Cu(H2O)5.5[B12H12]·2.5 H2O can be described as a monoclinic distortion variant of the CsCl‐type arrangement. As characteristic feature the formation of isolated [Cu2(H2O)11]4+ units as a condensate of two corner‐linked Jahn‐Teller distorted [Cu(H2O)6]2+ octahedra via an oxygen atom of crystal water can be considered. Since “zeolitic” water of hydratation is also present, obviously both classical H–Oδ−···+δH–O and non‐classical B–Hδ−···+δH–O hydrogen bonds play a significant role for the stabilization of the structure. A direct coordinative influence of the quasi‐icosahedral [B12H12]2− anions on the Cu2+ cations has not been determined. The zinc compound Zn(H2O)6[B12H12]·6 H2O crystallizes in a NaTl‐type related structure. Two crystallographically different [Zn(H2O)6]2+ octahedra are present, which only differ in their relative orientation within the packing of the [B12H12]2− anions. The stabilization of the crystal structure takes place mainly via H–Oδ−···+δH–O hydrogen bonds, since again the hydrogen atoms of the [B12H12]2− anions have no direct coordinative influence on the Zn2+ cations.
The Reaction of the Betain‐like Compound O2C2(PPh3)2 with [(cod)PtI2] – Crystal Structure of the Salt (HC{PPh3}2)[(η3‐C8H11)PtI2]
Authors: Petz Wolfgang , Öxler Florian , Neumüller Bernhard 
Published: December 2007

AbstractThe reaction of the betain‐like compound O2C2(PPh3)2 (1) with [(cod)PtX2] in THF solution gives the salt‐like compounds (HC{PPh3}2)[(η3‐C8H11)PtX2] (3, X = I; 4, X = Cl) in about quantitative yields. The new η3‐bonded C8H11 ligand is the result of a proton transfer from the coordinated cod ligand to 1 with subsequent release of CO2. The X‐ray analysis of 3 shows the presence of two isomers in a 60:40 ratio, which differ in the bonding of the C8H11 ligand. 3 crystallizes in the triclinic space group $\rm P{\bar 1}$ with the unit cell dimensions a = 1091.7(1), b = 1141.5(1), c = 1649.4(2) pm; α = 80.34(1)°, β = 83.62(1)°, γ = 89.03(1)°, V = 2013.7(4)·106 pm3, Z = 2.
Synthesis, Characterization and Crystal Structures of 1,2,4‐Triazole based Schiff‐Bases and their Copper(I) Complexes
Authors: Ghassemzadeh Mitra , Heravi Majid M. , Fallahnedjad Leyla , Neumüller Bernhard 
Published: December 2007

AbstractThe reaction of of 4‐amino‐5‐ethyl‐2H‐1,2,4‐triazole‐3(4H)‐thione (AETT, L) with furfural in methanol led to the corresponding Schiff‐Base (L1). The reaction of L1 with [Cu(PPh3)2]Cl in methanol gave to the neutral compound [(L1)Cu(PPh3)2Cl] (1). By recrystallization of 1 from CH3CN the complex [(L1)Cu(PPh3)2Cl]·CH3CN (1a) was obtained. All compounds were characterized by infrared spectroscopy, elemental analyses as well as by X‐ray diffraction studies. Crystal data for L1 at −80 °C: space group $\rm P{\bar 1}$ with a = 788.4(1), b = 830.3(2), c = 928.8(2) pm, α = 84.53(1)°, β = 65.93(1)°, γ = 72.02(1)°, Z = 2, R1 = 0.0323; for 1 at −100 °C: space group $\rm P{\bar 1}$ with a = 1166.3(1), b = 1423.8(2), c = 1489.1(2) pm, α = 62.15(1)°, β = 72.04(1)°, γ = 88.82(1)°, Z = 2, R1 = 0.0338 and for 1a at −100 °C: space group P21/c with a = 1294.1(1), b = 1019.8(2), c = 3316.9(4) pm, β = 94.73(1)°, Z = 4, R1 = 0.0435.
C‐O Bond Cleavage of Diethyl Ether and Tetrahydrofurane by [(dpp‐BIAN)AlI(Et2O)] [dpp‐BIAN = 1,2‐bis[(2,6‐di‐iso‐propylphenyl)‐imino]acenaphthene]
Authors: Fedushkin Igor L. , Lukoyanov Anton N. , Hummert Markus , Schumann Herbert 
Published: December 2007

AbstractAt elevated temperatures, the aluminum complex [(dpp‐BIAN)AlI(Et2O)] (1) splits the C‐O bonds of diethyl ether and tetrahydrofurane yielding the dimeric alkoxides [(dpp‐BIAN)AlOEt]2 (2) and [(dpp‐BIAN)AlO(CH2)4I]2 (3), respectively. Already at ambient temperatures, a cleavage of the C‐O bond of THF is to observe in the reaction of 1 with CpNa in THF as confirmed by the formation of [(dpp‐BIAN)AlO(CH2)4C5H5]2 (4a) and [(dpp‐BIAN)Al{O(CH2)4C5H5}(THF)] (4b) in a molar ratio of 1:2. The reaction of 1 with t‐BuOK affords the monomeric alkoxide [(dpp‐BIAN)AlO‐t‐Bu(Et2O)] (5). Compounds 2, 3, and 4a/b were characterized by elemental analyses and IR spectra. Additionally, the structures of 2 and 3 were determined by single crystal X‐ray diffraction.
A Novel Phase‐Transfer Catalyst: Monomeric Copper(II) Coordination Compound
Authors: Hang Tian , Ye Qiong , Xiong Ren‐Gen 
Published: December 2007

AbstractThe Copper(II) complex benzylcinchonidinium trichlorocuprate(II) (1) was obtained by the thermal treatments of CuCl2 with benzylcinchonidinium chloride (L1) in Pyrex tubes. The enantioselective efficiency of 1 studied by alkylation reaction of N‐(diphenylmethylene)glycine tert‐butyl ester (L2) is similar to that of normal benzylcinchonidinium chloride (L1).
The Crystal Structure of Dimethylamino Titanium Trichloride
Authors: Günther Bernd , Nöth Heinrich 
Published: December 2007

AbstractGreen crystals of Me2NTiCl3 associate to a chain polymer via four Ti‐Cl‐Ti bonds and generation of hexacoordinated Ti atoms. Like Et2NTiCl3 its amino group is not involved into forming Ti‐N‐Ti bridges. This is due to a short Ti‐N bond to the planar coordinated N atom of the Me2N group.
Synthesis and Characterization of MoFe3S4 and Mo2Fe2S4 Single Cubanes
Authors: Koutmos Markos , Georgakaki Irene P. , Tsiolis Panagiotis , Coucouvanis Dimitri 
Published: December 2007

AbstractThe synthesis of multimetallic M/S clusters by the reductive coupling of dimeric building blocks appears to be of general utility. In this paper we describe the synthesis and characterization of new single cubanes with cores such as [Mo2Fe2S4]2+ and [MoFe3S4]3+,2+.
Synthesis and Structural Characterization of Some Potassium Complexes of Some Bis(phenolate) Ligands and Some Novel Heterobimetallic Binuclear Arrays Formed with Trivalent Lanthanoid Ions
Authors: Binda Pascal I. , Delbridge Ewan E. , Dugah Divine T. , Skelton Brian W. , White Allan H. 
Published: December 2007

AbstractThe structural characterizations of the potassium complexes of a pair of dianionic bis(phenolate) ligands, {LR = [−OC6H2(2,4‐But)(6‐CH2)]2NCH2CH2R} R = NMe2, OMe, crystallized from 1,2,‐dimethoxyethane (DME) are recorded, showing them to take the binuclear form [K2LR(DME)3]. A pair of neutral binuclear heterobimetallic isotypic complexes are defined with ytterbium(III), with phenol, as sodium salts, of the form [Yb(LR)(OPh)2Na(DME)(HOPh)], and a further array with samarium(III), of the (partially protonated) form [Sm(LOMe)2Na(OH2)]. A further complex, [Na(DME)3][Yb(*Lpy)2], results from an unusual ligand reduction by an ytterbium(II) species to give a new dianionic Schiff base ligand which is coordinated to ytterbium(III) {*Lpy = −OC6H2(2,4‐But)(6‐CH=N‐CH‐2‐C6H4N)}.
Károly Schaffer and his school: The birth of biological psychiatry in Hungary, 1890–1940
Authors: Baran Brigitta , Bitter István , Fink Max , Gazdag Gábor , Shorter Edward 
Published: December 2007

AbstractIn the first third of the twentieth century, neuropathology seemed to offer the key to unlock the causes of psychiatric illness. Among the top centers devoted to the microscopic anatomy of the brain was that of Károly Schaffer in Budapest. Schaffer, a pioneer in the histopathology of Tay–Sachs–Schaffer disease, was also a charismatic teacher, bringing forth a school of investigators in psychopathology. Among them was László Meduna, who originated convulsive therapy. Despite the importance of the Schaffer school, it is almost unknown outside of Hungary, largely the result of the introduction of neurophysiological, neurochemical and molecular genetic methods that distracted attention away from histopathological contributions in psychiatry after the Second World War. The microscopic study of the brain and its diseases seemed increasingly less important.The present biographical account of Károly Schaffer and his school seeks to bring this important story in the early history of biological psychiatry to a wider audience and explain why it has since been forgotten.
Product variety in Australian snacks and drinks: how can the consumer make a healthy choice?
Authors: Walker Karen Z , Woods Julie L , Rickard Cassie A , Wong Carrie K 
Published: December 2007

AbstractObjectiveTo estimate the proportion of ‘healthy’ snack food and beverage choices available to an Australian consumer.DesignA survey of product Nutrition Information Panels (NIP) and product labels on snack foods and beverages offered for sale. Data on nutrient content were compared with criteria from different nutrient profile systems to estimate the proportion of items conforming to a ‘healthy’ choice.SettingA large supermarket in metropolitan Melbourne, Australia.ResultsA consumer could choose from 1070 different snack foods and 863 different drinks. Flavour variety was more common in snacks (maximum thirteen per product) while variation in container size was more common for drinks (up to ten per product). Recommended serving size for snacks varied greatly (18–100 g) while the serving size for drinks frequently did not correspond to the size of the container. Depending on the nutrient profile system selected, only 9–22 % of snack foods presented for sale could be deemed ‘nutritious’ by multiple criteria. Similarly, only 14–27 % of beverages met ‘healthy’ criteria.ConclusionsAs one factor to help reduce the obesogenic environment, the supply balance needs to be shifted in favour of ‘healthier’ snack foods and beverages, e.g. by reformulation of many products by the food industry and their presentation in smaller, standardised portion-size packaging.
Maize meal fortification is associated with improved vitamin A and iron status in adolescents and reduced childhood anaemia in a food aid-dependent refugee population
Authors: Seal Andrew , Kafwembe Emmanuel , Kassim Ismail AR , Hong Mei , Wesley Annie , Wood John , Abdalla Fathia , van den Briel Tina 
Published: December 2007

AbstractObjectiveTo assess changes in the Fe and vitamin A status of the population of Nangweshi refugee camp associated with the introduction of maize meal fortification.DesignPre- and post-intervention study using a longitudinal cohort.SettingNangweshi refugee camp, Zambia.SubjectsTwo hundred and twelve adolescents (10–19 years), 157 children (6–59 months) and 118 women (20–49 years) were selected at random by household survey in July 2003 and followed up after 12 months.ResultsMaize grain was milled and fortified in two custom-designed mills installed at a central location in the camp and a daily ration of 400 g per person was distributed twice monthly to households as part of the routine food aid ration. During the intervention period mean Hb increased in children (0·87 g/dl;P< 0·001) and adolescents (0·24 g/dl;P= 0·043) but did not increase in women. Anaemia decreased in children by 23·4 % (P< 0·001) but there was no significant change in adolescents or women. Serum transferrin receptor (log10-transformed) decreased by −0·082 μg/ml (P= 0·036) indicating an improvement in the Fe status of adolescents but there was no significant decrease in the prevalence of deficiency (−8·5 %;P= 0·079). In adolescents, serum retinol increased by 0·16 μmol/l (P< 0·001) and vitamin A deficiency decreased by 26·1 % (P< 0·001).ConclusionsThe introduction of fortified maize meal led to a decrease in anaemia in children and a decrease in vitamin A deficiency in adolescents. Centralised, camp-level milling and fortification of maize meal is a feasible and pertinent intervention in food aid operations.
C‐reactive protein and the mode of onset of labor in term pregnancies
Authors: WISER AMIR , SIVAN EYAL , DULITZKI MOTI , CHAYEN BENJEMIN , SCHIFF EYAL , BAR‐CHAIM ADINA , SIMCHEN MICHAL J. 
Published: December 2007

AbstractObjective. To evaluate whether C‐reactive protein (CRP) levels in maternal serum at post‐date follow‐up can predict the mode of onset of spontaneous delivery in term pregnancies and the interval to delivery. Study design. Women at 40 completed weeks of gestation were recruited. The interval from CRP sampling to delivery and mode of onset of delivery were noted. Results. Sixty women were divided into 3 groups according to the mode of onset of labor. Group A presented with spontaneous onset of contractions, Group B presented with pre‐labor ruptured membranes (PROM), and Group C completed 42 weeks without spontaneous initiation of labor. There was no association between CRP values and latency from time of sampling to delivery. Mean serum CRP in Group B (12.7 mg/l) was significantly higher than in either Group A (7.2 mg/l) or Group C (10.2 mg/l) (p = 0.01). In addition, CRP values in the upper quartile (>12.2 mg/l) had a 37.5% positive predictive value for PROM, with a negative predictive value of 93%. Conclusion. Women whose labor will start with PROM have higher CRP values at post‐date follow‐up than women whose labor starts otherwise.
Which factors play a role in clinical decision‐making in external cephalic version?
Authors: KOK MARJOLEIN , VAN DER STEEG JAN WILLEM , MOL BEN W.J. , OPMEER BRENT , VAN DER POST JORIS A. 
Published: December 2007

AbstractObjective. To assess the clinical factors that influence the estimates of clinicians of the success of an external cephalic version (ECV), and the subsequent management decisions made by clinicians. Design. We constructed 16 fictional vignettes of women with a term fetus in breech position eligible for ECV. Setting. Secondary and tertiary clinics in The Netherlands. Population. Thirty‐seven gynaecologists, residents and midwifes. Methods. Sixteen case summaries concerning a hypothetical patient eligible for ECV. Potential prognostic factors that varied between the cases were parity, maternal body mass index, engagement of the fetus, amniotic fluid, fetal growth, fetal presentation and placental localisation. For each case presentation, the clinicians were asked for their inclination to perform an ECV, and whether or not they would use tocolysis. Results. The estimated probabilities of success varied between 20 and 60%. The number of clinicians that would attempt an ECV varied per case between 32 and 97%. Amniotic fluid and engagement contributed 80% of the variation in the decision to perform ECV. In the case of oligohydramnios or an engaged breech, the clinicians tended not to perform an ECV. Conclusion. Amniotic fluid and engagement seem to be the main factors in the clinical decision‐making of clinicians in ECV. This decision‐making is probably experience based. Systematic knowledge of clinical prognosticators and subsequent assessment of their prognostic capacity is needed.
Seasonal influence on the admittance of pre‐eclampsia patients in Tygerberg Hospital
Authors: IMMINK ANNELIES , SCHERJON SICCO , WOLTERBEEK RON , STEYN D. WILHELM 
Published: December 2007

AbstractBackground. Previous studies suggest that the occurrence of pre‐eclampsia is seasonally distributed. This retrospective study aims to determine whether there is a seasonal variation in the number of admissions and the prevalence of women with pre‐eclampsia in Tygerberg Hospital, South Africa. Methods. The number of women admitted with a diagnosis of pre‐eclampsia, eclampsia or haemolysis elevated liver enzymes low platelets (HELLP) syndrome (together called pre‐eclampsia) was obtained from hospital records from 2002 to 2003 for each season and month. Associations were analysed with Odds Ratios (OR). Furthermore, these data was compared with the Cape Town temperatures recorded on each day over the period, as well as the total rainfall for each month. Bivariate logistic regression of the probability of pre‐eclampsia on temperature and rainfall was performed. Results. Pre‐eclampsia occurred in 11.5% of all admissions (1,329/11,585). The prevalence was highest in winter (13.6% pre‐eclampsia patients from all admissions). Women admitted in winter had a higher risk of developing pre‐eclampsia compared to those admitted in summer (OR =1.69, 95% CI: 1.07–1.53). The risk of developing pre‐eclampsia in June was higher than in February (summer in South Africa, reference month) (OR =2.81, 95% CI: 2.06–3.83). There was a significant correlation between the number of admissions with pre‐eclampsia and the minimum daily temperature (r = −0.620, p = 0.032). Conclusions. Pre‐eclampsia occurs more frequently in winter at Tygerberg Hospital, South Africa. The findings have implications for future research related to the aetiology of pre‐eclampsia as well as for clinical care.
New attempt using labio‐vestibular flap technique to manage circumcised women with Rokitansky syndrome
Authors: THABET SAEED MOHAMED AHMED , ALI ATHMAR HUSSEIN 
Published: December 2007

AbstractObjective. To assess the efficacy of the labio‐vestibular flap technique in managing circumcised women with Rokitansky syndrome and in correcting the sexuality defects caused by the anomaly present and by female circumcision. Design. A prospective, comparative, clinical study. Setting. Kasr El Aini School of Medicine, Cairo University, Egypt. Patients. Thirty‐four circumcised patients with Rokitansky syndrome were divided into 2 groups; Group 1 consisted of 22 cases treated with the labio‐vestibular flap technique, and Group 2 consisted of 12 cases treated with McIndoe's technique. Main outcome measures. Pre and postoperative clinical assessment of the newly formed vagina and sexuality. The new flap is formed of the remaining parts of the labia minora and the adjoining parts of the vestibule, and is used to cover the posterior and lateral walls. Meanwhile, the anterior wall is covered by the epithelium of the original blind vaginal pouch. The modified Kasr El Aini sexual assessment sheet assesses sexuality. Results. Rokitansky syndrome could be classified into 4 clinical types according to the degree of development of the uterus. The labio‐vestibular technique was simple and not associated with any graft rejection, hair growth or contraction of the reformed tract. Dyspareunia and marital failure were less significantly recorded in the labio‐vestibular technique than in McIndoe's technique. But, the most significant results were the improvement in sexuality, in addition to restoration of genital continuation, menstruation and fertility in some cases. Conclusion. The labio‐vestibular flab technique is the most simple and most suitable line of treatment for circumcised cases with Rokitansky syndrome. In these cases, the technique achieved good results in correcting sexual defects after circumcision.