bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Utility of Online Choice Options: Do Purely Online Schools Increase the Value to Students?
Authors: Rauh William Jonathan 
Published: March 2015

Online education has grown in popularity as a choice option over the past decade. A variety of studies exist on methodologies for content delivery and on the impacts of online education for specific communities. However, few works have considered the utility of online educational choices in comparison to physical schools. Using an expected utility model this paper examines the value conferred to a student in an online charter school versus traditional physical schools in the same state. Value in this case is defined as the likelihood of performing better on a standardized test.
Las condiciones ambientales en las aulas de Primaria en Iberoamérica y su relación con el desempeño académico
Authors: Murillo F. Javier , Martinez-Garrido Cynthia 
Published: March 2015

El clima escolar y de aula es uno de los factores que mejor explican el desempeño académico de los estudiantes; sin embargo, hay unos elementos del clima poco estudiados pero que juegan un importante papel en el aprendizaje: las condiciones ambientales del aula. En esta investigación se estudia la relación de la iluminación del aula, su ventilación, su aislamiento, y la adecuación de su tamaño, así como del orden y la limpieza de la misma, con el logro escolar. Para ello se observan 248 aulas de 9 países de Iberoamérica, y se contrastan los resultados con lo que los niños y niñas han aprendido en un curso escolar en Lengua y Matemáticas mediante Modelos Multinivel de 4 niveles de análisis. Para recoger la información se utilizaron los siguientes instrumentos: Guía de observación del aula para el investigador, Pruebas de Rendimiento en Matemáticas y en Lengua, y Cuestionario para los docentes del aula, para los estudiantes y para las familias. Los resultados muestran que los factores ambientales de proceso tales como el orden y la limpieza del aula, inciden en el desempeño de los estudiantes; sin embargo, no se han encontrado relaciones estadísticamente significativas con factores más estables como la iluminación, la ventilación, el ruido o el tamaño del aula, probablemente porque, como se demuestra, la gran mayoría de las aulas se encuentran en unas condiciones aceptables en estas variables.
El “efecto escuela” en países de América Latina: Reanalizando los datos del SERCE
Authors: Cervini Rubén Alberto 
Published: March 2015

El Laboratorio Latinoamericano de Evaluación de la Calidad de la Educación (LLECE) de la Oficina Regional de Educación para América Latina y el Caribe de la UNESCO, ha dado a conocer recientemente los resultados del análisis de los datos del Segundo Estudio Regional Comparativo y Explicativo (SERCE) realizado en América Latina y el Caribe, respecto de las relaciones entre los aprendizajes en matemática y lectura de sexto grado de la educación primaria, y los factores escolares y extraescolares. Para el análisis de los datos, el LLECE utilizó modelos jerárquicos lineales con dos niveles: alumno y escuela. En la construcción de los índices de nivel socioeconómico y cultural de la familia del alumno, se aplicó la técnica "modelo de crédito parcial" (Rasch). Las pruebas de Matemática y Lectura se analizaron separadamente. El estudio presenta las estimaciones de los efectos-escuela bruto, ajustado y neto, resultantes de la aplicación de esa metodología. En este artículo los datos del SERCE son reanalizados usando modelos multinivel bivariados con tres niveles (país, escuela y alumnos) y aplicando un procedimiento diferente para la construcción de índices de nivel socioeconómico y nivel cultural de la familia del alumno. Los resultados obtenidos divergen notablemente de los informados por el LLECE. Se extraen conclusiones y se discuten las implicaciones políticas.
Academic Program Approval and Review Practices
Authors: Creamer Don G. , Janosik Steven M. 
Published: March 2015

This report outlines general and specific processes for both program approval and program review practices found in 50 states and eight foreign countries and regions. Models that depict these procedures are defined and the strengths and weakness of each are discussed. Alternatives to current practice by state agencies in the U.S. are described that might provide for greater decentralization of these practices while maintaining institutional accountability.
Conversion of sulfur-free black liquor into fuel gas by supercritical water gasification
Authors: Huet Marion , Roubaud Anne , Lachenal Dominique 
Published: March 2015

Abstract
Supercritical water gasification of weak sulfur-free black liquor (BL) was performed in a batch autoclave at temperatures between 430°C and 470°C, pressure between 24 and 27 MPa and residence time between 2 and 63 min. Results show that the gas produced was a mixture of mainly hydrogen, methane, and carbon dioxide. Maximum conversion was achieved at 470°C and 60 min. Energy recovery (ER, ratio between the energy in the gas and in the initial BL) was 46%. Thirty-four percent of the carbon and 53% of the hydrogen initially present in BL were converted into gases. Nearly 15% of initial organic carbon remains in the liquid phase and consists mainly of phenolic compounds, which are stable under those conditions. A higher temperature is needed to convert all the organic carbon. Thermodynamic equilibrium should be reached at 700°C leading to a complete conversion and a better efficiency. Sodium recovery is close to typical kraft recovery value and compatible with causticizing.
A new cis-p-coumaroyl flavonol glycoside from the inner barks of Sophora japonica L.
Authors: Si Chuan-Ling , Yu Guo-Jing , Du Zhen-Guo , Huang Xiao-Feng , Fan Su , Du Hai-Shun , Hu Wei-Cheng 
Published: March 2015

Abstract
Tree barks could be a rich source of novel bioactive compounds, which are not well explored. In this work, the chemical constituent investigation of extractives from the inner barks of Sophora japonica L. (Leguminosae) led to the isolation of a new cis-p-coumaroyl flavonol glycoside, which was elucidated as kaempferol 3-O-(4″-cis-p-coumaroyl)-α-rhamnopyranoside (IV). The structure of the new compound was established mainly based on extensive spectroscopic techniques. In addition, among the four known phenolics purified in this study, including three flavonol glycosides [rutin (I), kaempferol-3-O-(6″-galloyl)-β-glucopyranoside (II), and quercitrin (V)], as well as a phenolic acid [trans-ferulic acid (III)], compounds II and III have never been reported in S. japonica previously.
Experimental and Stochastic Modeling of the Globular Microstructure and the Microsegregation Evolution during the Solidification of Magnesium Alloys Cast at Low Superheat via Containerless Melting
Authors: Nastac Laurentiu , El-Kaddah Nagy 
Published: March 2015

AbstractCasting at low superheat has a strong influence on the solidification morphology and macro- and microstructures of cast alloys. This paper shows the microstructure and microsegregation of cast Mg AZ31B alloy at superheat of 5°C, summarizes the multiscale model, and describes the simulation results obtained with a previously developed stochastic mesoscopic solidification model capable of predicting the microstructure of the cast alloy. The simulation results are compared with casting experiments carried out using the Magnetic Suspension Melting process. Casting at this low superheat was found to produce castings with a fine globular grain structure, with an average grain size of about 80 µm, which is about one-third the size of that obtained by conventional casting techniques. The stochastic model was validated against the experimental measured grain structure and Al microsegregation. A parametric study was performed to determine some key material and process parameters related to processing of cast Mg AZ31B alloy.
The Application of MHD Side Stirring Technology to Aluminium Melting Furnaces for Operational Efficiency Improvement – A Case Study
Authors: Peel Alan , Menet Pierre Yves 
Published: March 2015

AbstractElectromagnetic stirring in aluminium melting and holding furnaces is widely introduced and accepted throughout the aluminium industry but this paper looks to discuss some of the differentiating factors that have allowed the air-cooled MHD technology to provide effective circulation of the molten metal in furnaces when applied to the side of the melting furnace (rather than the traditional bottom-mounted location). This technology has been installed by Constellium and we discuss some of the benefits that have been experienced from the various installations. As well as providing certain key operational benefits this new technology allows for low-energy use and has removed many of the inherent risks of the older water-cooled technology in proximity to aluminium.
Intra-channel Cross-Phase Modulation Effect in Dispersion Compensated Single Channel Lightwave System with Negative Residual Dispersion
Authors: Syed Nitu , Faisal Mohammad 
Published: March 2015

AbstractAdvanced modulation schemes, particularly the phase-modulated signals, have already drawn huge research interests for ultra-high speed long-haul lightwave transmission systems. We have considered 40 Gbit/s optical RZ pulse propagating in a periodically dispersion managed (DM) single channel system with negative residual dispersion. We investigate the effects of negative residual dispersion on intra-channel cross-phase modulation (IXPM)-induced phase shift. Analytical estimation for phase shift has been deduced using perturbed variational formulation. We therefore explore the impact of variation of various parameters such as transmission distance, duty cycle, bit rate, etc. on phase shift. The outcome of our work is to explore the performance of the dispersion compensated system with some negative residual dispersion so that the IXPM-induced phase shift remains low in optical fiber communication.
Novel Design for Surface Plasmon Resonance Lenses
Authors: Chang Kao-Der , Lu Ruei-Chang , Liao Yu-Ping , Lee Keh-Yi 
Published: March 2015

AbstractNew design for surface plasmon resonance (SPR) lens having a sub-wavelength size of spot in the far-field region is proposed in this work. An extra structure of concentrically annular grating fabricated on the top surface of SPR lens is utilized to improve the quality of focusing. Numerical simulation results of the novel type of SPR lenses with different grating structures are presented and compared.
Status of pinnipeds in Southeast Asia
Authors: Mahood Simon P. , Duckworth J.W. 
Published: March 2015

AbstractThere are no published records of pinnipeds in Southeast Asia. Photographs in the national media between January 2010 and December 2013 documented seven pinniped records. All were individuals caught by fishermen in the central part of Vietnam (17°56′N south to 15°23′N). All except one pinniped record can be assigned to Largha (=Spotted) Seal
Über die Darstellung und röntgenographische Untersuchung von Verbindungen des Formeltyps K2LnF5
Authors: Güde Klaus , Hebecker Christoph 
Published: March 2015

Abstract
Results of X-ray studies on single crystals of K2GdF5 and on other K2LnF5-type compounds are reported. Single crystals of K2GdF5 have been prepared from 2 :1-mixtures of the binary fluorides. These samples were investigated by X-ray methods. K2GdF5 crystallizes orthorhombically with unit cell dimensions: a = 10.814(4), b = 6.623(1), c = 7.389(3) Å, space group No. 62, Pnam -D16
2h , Z = 4. In addition we have corrected earlier results about cell constants of the series of K2LnF5-type compounds.
Zwei neue Bis(trimethylsilyl)aminoderivate des Antimons: MeSb(N{SiMe3}2)2 und MeCl2Sb(N{SiMe3}2)2
Authors: Kolondra W. , Schwarz W. , Weidlein J. 
Published: March 2015

Abstract
Unexpectedly the reaction of SbCl3 with Na(N{SiMe3}2) in a 1:3 molar ratio forms MeSb(N{SiMe3}2)2, I, (Me = CH3) and other trimethylsilyl compounds. The colourless and liquid methylstibane derivative I is monomeric in solution and forms MeSbCl2(N{SiMe3}2)2 (II) on reaction with SO2Cl2. Both new compounds have been characterized by analyses, NMR, IR and Raman spectra. The X-ray structure determination for II shows the monoclinic space group P21/C with 4 monomeric units per cell. The structure was refined to an R-value of 0,052.
Synthese von PR3 (R = Ph, OMe) substituierten Cubanclustern vom M2M'2S4-Typ und Molekülstruktur von (C5Me5)2Cr2Co2{P(OMe)3}2(μ3 -S)4
Authors: Brunner Henri , Meier Walter , Wächter Joachim , Pfisterer Heike , Ziegler Manfred L. 
Published: March 2015

Abstract
The reaction of the cubane cluster (C5Me5)2Cr2Co2(CO)2S4 with PR3 (R = Ph, OMe) resulted in a stepwise substitution of CO ligands by PR3. One of the reaction products, (C5Me5)2Cr2Co2{P(OMe)3}2S4, was characterized by an X-ray diffraction study, confirming that the 60-e core of composition Cr2Co2S4 was retained.
Lineare Oligophosphaalkane, XI [1] Stabilisierung von Phosphiniden, PH, im Clusteryerband — Röntgenstrukturanalyse von Fe4(CO)10[(μ2-PPri)2CH2](μ2-PPriMe)(μ2-H)(μ4-PH)
Authors: Brauer David J. , Hasselkuß Gerd , Hietkamp Sibbele , Sommer Herbert , Stelzer Othmar 
Published: March 2015

Abstract
Reaction of HPriP-CH2-PPriH with Fe2(CO)9 in a molar ratio of 1:2 produces a mixture of cluster compounds from which Fe4(CO)10[(μ2-PPri)2CH2](μ2-PPriMe)(μ2-H)(μ4-PH) could be isolated by liquid chromatography. X-ray structural analysis shows a planar trapezoid arrangement for the four iron atoms (Fe1 -Fe2 2,648(1), Fe2 -Fe3 2,790(1), Fe3 -Fe4 2,643(1), Fe1 --Fe4 4,109(1) Å ) capped by the novel bidentate phosphido bridge (μ2-PPri)2CH2 and the unsubstituted phosphinidene, PH( Fe1 - P4 2,284(1), Fe2 - P4 2,410(1), Fe3 - P4 2,405(1), Fe4 - P4 2,288(1), P4 - H1 1,39(4) Å).
Übergangsmetallkomplexe instabiler Ylide, IX [1] Zur Reaktivität von Pentacarbonyl(dimethyloxosulfoniomethanid)chrom(0) gegenüber Organoelementmethyldiphenylphosphanen RnECH2PPh2 (ERn = Ph2Sb, MeS, PhS, PhSe) und (RnE)2CH2 (RnE = Ph2Sb, MeS)
Authors: Weber Lothar , Wewers Dietmar , Lücke Ewald 
Published: March 2015

Abstract
Treatment of the sulfur ylide complex (CO)5Cr[CH2S(O)Me2] (1) with the bifunctional phosphines Ph2PCH2ERn (ERn = SMe, SPh, SePh) lead to pentacarbonylchromium phosphorus ylide complexes (CO)5CrCH2PPh2CH2ERn. Only the S-methyl derivate could be converted to the metallocycle (CO)4[xxx] (ERn = SMe) by UV-irridiation. The ylide chelate complex (CO)4[xxx]Ph2 is formed directly by the thermal reaction of Ph2PCH2SbPh2 with 1. N o ylide complexes result from the reaction of 1 with (Ph2Sb)2CH2 and (MeS)2CH2. The only products identified were (CO)5Cr[Ph2SbCH2SbPh2] and [(CO)5CrS(Me) - ]2CH2, respectively.
Reaktion der Alkoxo-oxovanadium(V)-dichloride mit Bis(tert-butylamino)-dimethylsilan/ Reaction of Alkoxo Oxovanadium(V) Dichlorides with Bis(tert-butylamino) Dimethylsilane
Authors: Preuss Fritz , Fuchslocher Edith , Sheldrick William S. 
Published: March 2015

Abstract
The iminovanadium (V) com pounds tC4H9N = V(NtC4H9-SiMe2-NHtC4H9)Cl2 (3) and [VCl(μ-Cl)(NtC4H9)(NHtC4H9)(NH2
tC4H9)]2 have been prepared by reaction of Me2Si(NHtC4H9)2 with VO(OC2H5)Cl2 and VO(O tC3H7)Cl2, respectively. 3 was investigated by 1H , 51V NMR spectroscopy and X-ray diffraction analysis; the structure has been found to be a mononuclear vanadium complex with a distorted trigonal bipyramidal arrangement of the ligands.
Nitrido-zido-Komplexe des Molybdän(VI): Synthese und Kristallstruktur von MoN(N3)2Cl(terpy)/ Nitrido Azido Complexes of Molybdenum(VI): Synthesis and Crystal Structure of MoN(N3)2Cl(terpy)
Authors: Beck Johannes , Schweda Eberhard , Strähle Joachim 
Published: March 2015

Abstract
MoN(N3)2Cl(terpy) is formed by the reaction of MoCl4(C2H5CN)2 with (CH3)3SiN3 and subsequent addition of terpy. This complex appears also as the main product o f the heterogeneous reaction between MoCl3(terpy) and (CH3)3SiN3. It crystallizes in the monoclinic space group P 21/c with the lattice parameters a = 875.5, b = 1041.4, c = 1891.3 pm, β = 97.00°, Z = 4. The central Mo atom is seven-coordinated in the form of a slightly distorted pentagonal bipyramid, the nitrido and chloro ligands being in axial positions. The triply bonded nitrido ligand ( Mo - N 1 = 166.2 pm) causes a strong trans effect, resulting in a long Mo-Cl distance of 271.9 pm.
Elektrisch leitfähiges μ-Cyano(tetrabenzoporphyrinato)cobalt(III)/ Electric Conductive Electric Conductive //-Cyano(tetrabenzoporphyrinato)cobalt(III)-Cyano(tetrabenzoporphyrinato)cobalt(III)
Authors: Hanack Michael , Hedtmann-Rein Carola 
Published: March 2015

Abstract
The preparation of tetrabenzoporphyrinatocobalt(II) and tetrabenzoporphyrinatocobalt(III)- cyanide derivatives either with terminal or bridging cyanide is described. The IR and the 1H NMR spectra as well as magnetic measurements are in accordance with the proposed structures and the oxidation states of the complexes. μ-Cyano(tetrabenzoporphyrinato)cobalt(III) (4) exhibits a powder conductivity of σRT = 4 ·10-2 S/cm, without additional external doping.
Neue Zintlphasen: Ba3GaSb3, Ca3GaAs3 und Ca3InP3 / On New Zintlphases: Ba3GaSb3, Ca3GaAs3 und Ca3InP3
Authors: Cordier Gerhard , Schäfer Herbert , Steher Michael 
Published: March 2015

The new compounds Ca3GaAs3 and Ca3InP3 crystallize in the orthorhombic system, space group Pnma (No. 62) with the lattice constants
Ca3GaAs3: a = 1217.1(5) pm, b = 419.7(2) pm, c = 1341.4(5) pm;
Ca3InP3: a = 1201.9(5) pm, b = 413.8(2) pm, c = 1346.0(5) pm.
In the structures distorted GaAs4- and InP4-tetrahedra resp. are connected by common corners to chains.
The new compound Ba3GaSb3 crystallizes in the orthorhom bic system, space group Pnma (No. 62) with the lattice constants
a = 1411.7(5) pm, b - 2116.7(7) pm, c = 712.8(3) pm.
Two distorted GaSb4-tetrahedra are connected by a common edge to isolated Ga2Sb6-groups. The three compounds belong to the Zintl phases.
Synthesen und Eigenschaften von Piperidin-N-oxyboranen / Synthesis and Properties of Piperidine-N-oxyboranes
Authors: Armbrecht Michael , Maringgele Walter , Meller Anton , Noltemeyer Mathias , Sheldrick George M. 
Published: March 2015

Piperidine-N-oxyboranes and 2,2,6,6-Tetramethylpiperidine-N-oxyboranes have been prepared starting from halogenoboranes by three methods:
a) By reaction with N-hydroxypiperidine and triethylamine;
b) by cleavage of the Si -O-bond in piperidine-N-oxy-trimethylsilanes and
c) by reaction with metallated piperidine-N-oxy compounds.
Diboryloxides and diborylamides, resp., are obtained upon reaction of piperidine-N-oxybrom oboranes with hexamethyldisiloxane and hexamethyldisilazane. Steric influences upon reactivity and spectroscopic properties are discussed. The compounds are characterized by elemental analysis, mass and NMR spectroscopy (1H , 11B , 13C, 14N, 29Si). An X-ray analysis has been carried out for tris(2,2,6,6-tetram ethylpiperidine-1-oxy)borane 13.
Die Kristallstruktur des wasserfreien CsTlI4 / The Crystal Structure of Dehydrated CsTlI4
Authors: Thiele Gerhard , Rotter Heinz W. , Zimmermann Klaus 
Published: March 2015

CsTlI4, which has been synthesized either by heating of a 1:1 mixture of CsI/TlI with iodine in a closed system or by dehydration of CsTlI4 · 2H2O, crystallizes in the monoclinic space group P21/c with a = 731.10(24) pm. b = 1870.42(126) pm. c = 847.70(43) pm. β = 105.14(4)°. Z = 4.
In the crystal structure the Cs cations are coordinated by 11 iodine atoms which belong to seven TlI4 anions.
Halogen-Metall-Austausch an Dihalogenphosphan-Komplexen; Synthese von Diphosphan-, Diphosphen- und Phosphiniden-Derivaten / Halogen Metal Exchange; Diphosphane-, D iphosphene-, Phosphinidene-Complexes
Authors: Lang Heinrich , Hüttner Gottfried , Jibril Ibrahim 
Published: March 2015

Complexes of dihalophosphanes LnM-P(R)(Hal)2 (LnM = 16-electron fragment e.g. Cp(CO)2Mn) undergo transformations into phosphinidene-, diphosphene- or diphosphanederivatives upon treatment with metallating agents (e.g. tBuLi/TMEDA).
On the basis of many experimental observations a unified reaction scheme is proposed for these syntheses. The preparation and reactivity of diphosphane complexes LnM-(R)P(H) -(R)P(H)-MLn is discussed in some detail. Analytic, spectroscopic and X-ray techniques are used to establish the results. A prominent finding is the observation of an extremely long P-P distance (235.1(3) pm) for the sterically strained meso-[Cp(CO)2Mn]2(tC4H9)P(CH3) -(tC4H9)P(CH3)
The Oxidation of Trimethylamine by OH Radicals in Aqueous Solution, as Studied by Pulse Radiolysis, ESR, and Product Analysis. The Reactions of the Alkylamine Radical Cation, the Aminoalkyl Radical, and the Protonated Aminoalkyl Radical
Authors: Das Suresh , von Sonntag Clemens 
Published: March 2015

Hydroxyl radical reactions with trimethylamine in aqueous solution lead to the formation of the aminoalkyl radical (CH3)2NCH2 (A) and its conjugated acid (CH3)2HN+CH2 (AH+) as well as to the alkylamine radical cation (CH3)3N+(N+). These radicals are transform ed into each other by hydrolytic reactions, e.g.
[xxx]
Radicals AH+ are more acidic (pKa ≈ 3.6) than the radicals N+(pKa ≈ 8.0). Consequently, N+ predom inate over AH+ under quasi equilibrium conditions (e.g. in the presence of phosphate buffer) and are the only species observed by ESR in acid solutions. Reacting with the protonated amine. OH radicals abstract hydrogen at nitrogen and at carbon with comparable ease. Reaction of OH radicals with the free amine may initially also generate N+, beside H-abstraction at carbon. Radicals A’ absorb more strongly at 260 nm (ε = 3390 dm3mol-1cm-1) than the radical cation N+(ε = 950 dm3mol-1cm-1). Radical A' has reducing properties whereas radicals AH+ and N+ have oxidizing properties and hence can be monitored with p-nitroacetophenone (the reducing radicals), and Fe(CN)6
4- , N ,N'-tetramethyl-p-phenylenediamine and 2,2'-azinobis-(3-ethyl-benzthiazoline- 6-sulphonate) (the oxidizing radicals). These radicals mainly (≥ 85 % ) disproportionate. one of the products being formaldehyde
Formylwolfram-Komplexe / Formyl Tungsten Complexes
Authors: Berke Heinz , Kundel Peter 
Published: March 2015

Abstract
Bis(phosphite)-substituted formyl complexes (OC)2(ON)L2WCHO L = P(OMe)3 (4a), P(OEt)3 (4b), P(OiPr)3 (4c) were generated from the corresponding cationic (OC)3(ON)WL2
+ system s using borohydride reagents. The decomposition of 4a-4c leads to hydride com pounds (OC)2(ON)L2WH or (OC)3(ON)LWH , L=P(OMe)3 (5a, 6a), L=P(OEt)3 (5b, 6b), L=P(OiPr)3 (5c, 6c).
Zur Reaktion von (CO)4FeP(R)Cl2 mit Na2Cr2(CO)10 / Reactions of (CO)4FeP(R)Cl2 with Na2Cr2(CO)10
Authors: Borm Jutta , Knoll Konrad , Zsolnai Laszlo , Huttner Gottfried 
Published: March 2015

(CO)4FeP(R)Cl2 reacts with Na2Cr2(CO)10 to give the μ3 RP capped trigonal heterom etallic closed cluster Fe(CO)3Cr(CO)4Cr(CO)5(μ3-PR)(1) as a major product. ACr(CO)5-derivative of a metal substituted phosphane [(μ2(tBuPCl)Fe2(CO)7)(tBuPH)]Cr(CO)5 (2) is obtained as a minor component.
The analogous reaction with (CO)4FeP(Ph)Cl2 only gives the known cluster Fe3(CO)9(μ3-PR)2 (3), while (CO)4FeP(c-hexyl)Cl2 results in 4, a pentacarbonylchromiumderivative of the diiron species Fe2(CO)6μ-(PR)3. Species o f this type, containing an Fe2(CO)6 entity doubly bridged by μ2-PR entities, which are them selves linked by another PR-group, are obtained in a systematic high yield process by reacting Fe2(CO)6(μ2-RPH)2 with n-BuLi/TMEDA , RPCl2. For com pound identification, analytical and spectroscopic data as well as four X-ray analyses are presented.