bluuebunny/crossref_metadata_2025_split huggingface dataset:
Menthylsubstituierte Phosphorverbindungen, II. L-Men(R)P(X)Cl (R = Cl, L-Men, D-Men; X = :, S). Charakterisierung singulärer, diastereotoper und enantiotoper Menthylgruppen durch 1H-, 13C- und 31P-NMR-Techniken/ Menthyl-Substituted Phosphorus Compounds, II L-M en(R)P(X)Cl (R = Cl, L-Men, D-Men; X =:, S). Characterization of Singular, Diastereotopic and Enantiotopic Menthyl-Groups by 1H, 13C and 31P NMR Techniques
Authors: Hägele Gerhard , Kückelhaus Wolfgang , Seega Jürgen , Tossing Gudrun , Kessler Horst , Schuck Regina 
Published: March 2015

Abstract
Menthyl-substituted phosphorus compounds L-M en(R )P(X )Cl(R = Cl, L-M en, D -Men ; X = :, S) are synthesized. ID and 2 D NMR studies on nuclei 1H , 13C and 31P were used to characterize singular, diastereotopic and enantiotopic menthylgroups.
Synthese und Struktur des Ethendithiolato-Komplexes [(CO)3FeSCH2]2, einem Dihydrobenzvalen-Analogon/ Synthesis and Structure of the Ethenedithiolato Complex [(CO)3FeSCH2]2, an Analogon of Dihydrobenzvalene
Authors: Messelhäuser Johannes , Lorenz Ingo-Peter , Haug Klaus , Hiller Wolfgang 
Published: March 2015

Abstract
The ethenedithiolato complex [(CO)3FeSCH2]2 (1) is obtained by thermal fragmentation of thiirane-S-oxide in the presence of Fe3(CO)12 in THF and by photolytic reaction of [(CO)3FeS]2 (3) with ethene, respectively. According to an X-ray structure analysis, complex 1 has the same symmetric polyhedron structure as dihydrobenzvalene 2 .
Phosphorverbindungen ungewöhnlicher Koordination, 5 [3+2]- sowie [4+2]-Cycloadditionsreaktionen an ein kinetisch stabilisiertes Phosphaalken/ Phosphorus Compounds with Unusual Coordination, 5 [3+2]- as well as [4+2]-Cycloaddition Reactions to a Kinetically Stabilized Phosphaalkene
Authors: Zurmühlen Frank , Rösch Wolfgang , Regitz Manfred 
Published: March 2015

Abstract
Aliphatic diazo compounds display different reactivity towards the phosphaalkene 9: diazomethane, diazoethane and terf-butyl diazoacetate (10a-c) formally react with Si/P-insertion to give the hitherto unknown phosphaalkenes 12a-c. In contrast, 1-diazo-2.2-dim ethylpropane (10d) and diazotrimethylsilylmethane (10e) lead to the 1.2.4-diazaphospholes 15 and 17, respectively, if the primary products (11d , 14) are treated with sodium hydroxide in tetrahydrofuran. T he reaction of the nitrile oxides 18a-c with 9 yields the 1.2.4-oxazaphospholes 20a-c; the [3+2] cycloadducts 19a-c are assumed to occur as intermediates, which eliminate hexamethylsiloxane either spontaneously (19a, b) or with OH- -catalysis. Azide dipoles (21a-c) add to 9 with formation of 4.5-dihydro-1.2.3.4-phospholes (22a-c) which - instead of aromatization by hexamethyldisiloxane elimination - prefer fragmentation to 23 (→25 ) and imidoesters 24a-c; hydrolysis produces the pivaloyl amides 26a-c. The 1:2 reaction between 9 and the o-quinones 31a-d proceeds via [4+2] cycloadducts (32a-d) to produce the phosphoranes 34a-d by a subsequent [4+1] cycloaddition process.
Notizen: Beiträge zur Chemie des Phosphors, 158. Über die Hexadecaphosphane P16Et2 und P16Me2/ Contributions to the Chemistry of Phosphorus, 158. On the Hexadecaphosphanes P16Et2 and P16Me2
Authors: Bäudler Marianne , Becher Rainer 
Published: March 2015

Abstract
Diethyl-hexadecaphosphane (2) and dimethylhexadecaphosphane (3) have been synthesized by reacting dilithium-hexadecaphosphide, Li2P16 (1 ), with ethylbromide and methylbromide, respectively. 2 and 3 are the first polycyclic organophosphanes with 16P atoms in the molecule.
Darstellung und Struktur des N-Thiobis-N′ -(phenylsulfonyl)schwefeldiimids / Synthesis and Structure of N-Thiobis-N′-(phenylsulfonyl)sulfurdiimide
Authors: Roesky Herbert W. , Sundermeyer Jörg , Noltemeyer Mathias , Sheldrick George M. , Meyer-Bäse Karen , Jones Peter G. 
Published: March 2015

The reaction of S4N4 with PhSO2NCl2 proceeds with formation of (PhSO2NSN)2S 2. The main product 2 was characterized by an X-ray structure determination. [P21/c, a = 996.8(2), b = 1733.0(2), c = 1131.2(1) pm, β = 114.69(1)°, Z = 4, R = 0.044 for 1911 reflections.] 2 contains a sulfur-nitrogen chain with a planar central N4S3-Unit. The substituents at the NSN-groups are in cis-trans positions.
2 reacts with AgAsF6 to yield the 1:1 complex 3; attempts to recrystallise this from CH2Cl2 led to 2 · CH2Cl2, which was also subjected to a crystal structure determination [P1̄, a = 554.4(2), b = 1313.5(4), c = 1541.3(4) pm, α = 111.05(2), β = 94.61(2), γ = 92.24(2)°. Z = 2. R = 0.088 for 1728 reflections]. Minor differences between the two forms of 2 are observed.
Cuticular Hydrocarbons of the Colorado Beetle Leptinotarsa decemlineata say
Authors: Maliński Edmund , Kuśmierz Jósef , Szafranek Janusz , Dubis Eligiusz , Poplawski Janusz , Wróbel Jerzy T. , König Wilfried A. 
Published: March 2015

Abstract
The cuticular hydrocarbons of the Colorado beetle Leptinotarsa decemlineata say consist of 2-methylalkanes, internally branched monomethylalkanes, dimethyl-, trimethyl-and tetramethyl-alkanes. The hydrocarbons differ from those of most of the other insects so far investigated. The major components were found to be the dim ethyl branched alkanes, 2,6-and/or 7,22-dimethyl-octacosane and the tetram ethylalkane, 3,10,16,23-tetram ethyltritriacontane. The hydrocarbons identified are members of homologous series which differ by two m ethylene groups. The identification of hydrocarbons was achieved by mass spectrom etry and gas chromatographic determination of Kovats retention indices on two high efficiency capillary columns coated with Dexsil 300 and OV-1.
Solutions of Aluminium Trichloride in Tetramethylurea and the Molecular Structure of an Aluminium Trichloride Tetramethylurea Adduct
Authors: Bittner Astrid , Männig Detlef , Nöth Heinrich 
Published: March 2015

Abstract
Aluminium trichloride forms a 1:1 addition product with tetramethylurea (1) the structure of which has been determined by X-ray methods. Tetramethylurea is bound to the AlCl3 unit via its oxygen atom; consequently, a lengthening of the CO bond is observed. The (CH3)2N units are less twisted relative to the OCN2 plane than in the free ligand.
Solutions of AlCl3·OC(NMe2)2 in diethylether contain both the initial molecular adduct 1 and the ether adduct AlCl3·OEt2. In tetramethyl urea, compound 1 dissociates predominantly into the ions AlCl4- and {Cl2Al[OC(NMe2)2]2}+ . These solutions have been studied by 27Al NMR spectroscopy.
Die Kristallstruktur von [(CH3)4N]2TeCl6 und über die Einschlußverbindung [(CH3)4N]2(CH3CN)TeCl6 / The Crystal Structure of [(CH3)4N]2TeCl6 and the Inclusion Compound [(CH3)4N]2(CH3CN)TeCl6
Authors: Abriel Walter 
Published: March 2015

Abstract
Both title com pounds show an antifluorite-like arrangement of (CH3)4N+ cations and TeCl6
2- anions. The remaining octahedral holes in this array can be filled with CH3CN molecules forming the inclusion com pound by crystallization from CH3CN solution. [(CH3)4N]2TeCl6 (space group Fd3̄c with a = 25.791(3) Å at 265(5) K and Z = 32) contains almost regular TeCl6
2-octahedra. In contrast, in [(CH3)4N]2(CH3CN)TeCl6 (space group Cmcm with a = 12.765(6), b = 14.349(7), c = 12.716(3) Å and Z = 4) the anion is statically distorted with the approximate point symmetry 4 mm. At temperatures above 320 K the solvent molecules can be removed yielding the Fd3c phase. Finally, structural relationships between antifluorite-like phases A2BX6 and elpasolites A2B′BX6 considering halogenides and cyanides are discussed.
Zur Reaktivität von Natrium-bis-trimethylsilylamid gegenüber Metallcarbonylkomplexen mit Metall-Metall-Bindungen, I ER2-verbrückte Dicyano- und Diisonitril-octacarbonyl-dimanganate (E = Sn, Pb) / The Reactivity of Sodium Bis-trimethylsilylamide against Metal Carbonyl Complexes with Metal Metal Bonds, I ER2 Bridged Dicyano or Diisonitrile Octacarbonyl Dim anganates (E = Sn, Pb)
Authors: Moll Matthias , Behrens Helmut , Merbach Peter , Trümmer Karl-Heinz , Thiele Gerhard , Wittmann Kurt 
Published: March 2015

Abstract
EPh2 bridged dicyano octacarbonyl dimetalates {Ph2E[Mn(CO)4CN]2}2- are formed by the reaction of bis(carbonyl-metalates) of tin and lead Ph2E[Mn(CO)5]2 with NaN(SiMe3)2. The new dicyano anions can be transformed with trialkyloxonium tetrafluoroborates [R′3O]BF4 or chlor-trimethylsilane and -germane into the corresponding diisonitrile complexes Ph2E[Mn(CO)4CNR′]2 (R′=Me, Et, SiMe3, GeMe3). In the case of Ph2E [Mn(CO)4CNR′]2 (R′=Me, Et; E=Sn, Pb) the two phenyl groups can be removed with dry hydrogenchloride to give Cl2E[Mn(CO)4CNR′]2.NMR and mass spectra are discussed. The vibrational spectra of the new compounds show cis-coordination of the Sn atoms and the cyano or isonitrile ligands in the carbonylmetalate fragments. This is confirmed by the X-ray structure analysis of Ph2Sn[Mn(CO)4CNMe]2 (space group P21/n).
Magnesiumorganische Innerkomplexe, Teil II [1]. Ethyl(dialkylaminoalkyl)- und Ethyl(4-alkoxybutyl)magnesium-Verbindungen / Organomagnesium Inner Complexes, Part II [1]. Ethyl(dialkylaminoalkyl)- and Ethyl(4-alkoxybutyl)magnesium Compounds
Authors: Bogdanović Borislav , Koppetsch Gudrun , Krüger Carl , Mynott Richard 
Published: March 2015

Abstract
The reaction of bis(dialkylaminoalkyl)-and bis(4-alkoxybutyl)magnesium inner complexes with MgEt2 leads to the formation of ethyl(dialkylaminoalkyl)-and ethyl(4-alkoxybutyl)magnesium compounds. The X-ray crystal structures of ethyl(3-N,N-dimethylam inopropyl)magnesium and ethyl(3-N-cyclohexyl-3-N-methylaminopropyl)magnesium confirm that the com pounds are dimeric with the α-C-atom of the chelating ligand bridging the magnesium atoms.
The difference in reactivity of the Mg-Et and Mg-CnH2nX bonds (X = NR′R″, OR) makes itself apparent in the reaction of these complexes with ethylene: up to six ethylene molecules are inserted, whereby in the case of the ethyl(4-alkoxybutyl)magnesium compounds insertion occurs preferentially into the Mg-Et bond whereas in the case o f the ethyl(dialkylaminoalkyl)magnesium compounds both bonds are equally reactive.
Sila-Pharmaka, 34. Mitt. [1]. Sila-Analoga des Triparanols und Ethamoxytriphetols: Synthese sowie pharmakologische und toxikologische Eigenschaften / Sila-Pharmaca, 34th Communication [1]. Sila-Analogues of Triparanol and Etham oxytriphetol: Synthesis as well as Pharmacological and Toxicological Properties
Authors: Tacke Reinhold , Bentlage-Felten Anke , Linoh Haryanto , Magda Stephen 
Published: March 2015

Abstract
Starting from tetramethoxysilane, sila-triparanol 4b and sila-ethamoxytriphetol 8b were synthesized by four-step syntheses. 4b and 8b exhibit a strong hypolipidemic activity in mice after p.o. administration. Whereas 4b and its carbon analogue triparanol (4a) show a similar hypolipidemic potency, 8b was found to be less potent than its carbon analogue ethamoxy­-triphetol (8a). The silicon com pounds 4b and 8b are less toxic (repeated administration over a period o f 8 days) than the corresponding carbon analogues 4a and 8a, respectively.
Das Phasendiagramm des Systems Aluminiumchlorid-Pyridiniumchlorid / Determination of the Phase Diagram Aluminiumchloride-Pyridiniumchloride
Authors: Seemann Gerd , Hensen Karl 
Published: March 2015

Abstract
A phase equilibrium study of the system aluminiumchloride and pyridiniumchloride has been carried out. The phase diagram of the system indicates the existence of four congruently melting compounds of the molar ratio AlCl3/PyHCl 1:1, 1:2, 1:3, 2:3 .
Synthese und Konformationsstudien ringsubstituierter Titanocen-Dithiolen-Chelate / Synthesis and Conform ational Studies of Ring-Substituted Titanocene Dithiolene Chelates
Authors: Köpf Hartmut , Klapötke Thomas 
Published: March 2015

Abstract
The titanocene dithiolenato chelates Cp′2Ti(S2C6H3CH3-4) and CpCp′Ti(S2C6H3CH3-4) (Cp = η5-C5H5, Cp′ = η5-C5H4CH3) were prepared by reaction o f Cp′2TiCl2 or CpCp′TiCl2 with equiva­lent amounts of 1,2 -(LiS)2C6H3CH3-4. The structure and the conform ational mobility of the η5-bonded and of the chelating ligands of the dithiolenato complexes are discussed on the basis of their temperature-dependent 1H NMR spectra. The mass spectra show metastable transitions for the fragmentation processes.
Das Ketocarben-Oxiren-Gleichgewicht unter einem präparativen Aspekt≠ / The Oxiren-Oxo Carbene Interconversion from a More Preparative Point of View≠
Authors: Rühl Wolfgang , Bölsing Friedrich , Hofer Edgar , Speer Dietrich , Jansen Martin 
Published: March 2015

Abstract
The photochemical decomposition of α-diazoketone 1 in toluene gives rise to the formation of the well known keto carbene-oxirene equilibrium from which not only the product of the Wolff rearrangem ent can be derived but also the com pounds 5, 6 and 7 which are formed directly via the corresponding keto carbenes A and B respectively. Formation of the azulene 6 is unexpected in this context, it's structure could be revealed by X-ray analysis. The results may be regarded as an additional contribution to the mechanism of the Wolff rearrangement, but what is more, they could serve as a model for the feasibility of mechanistic oxirene chemistry in a more preparative aspect.
ESR-und ENDOR-Untersuchungen der Autoxidationsprodukte des Adrenalons und analoger Verbindungen / ESR and ENDOR Investigations of the Autoxidation Products of Adrenalone and Related Compounds
Authors: Stegmann Hartmut B. , Stolze Klaus , Scheffler Klaus 
Published: March 2015

Abstract
The signs of the proton coupling constants of adrenalone semiquinone and related compounds were determined by ENDOR and TRIPLE resonance studies, thereby verifying the increment system described in our previous paper [2], Comparison of the spin-distribution of several substituted acylcatechols showed the conformational influence on the coupling constants due to mesomeric interaction of the carbonyl group with the aromatic π-system.
Adrenalone and other N -monosubstituted catecholamines showed rather stable secondary radi­cals after the decay of the primary semiquinone radical. They were identified as substituted dihydropyrazinium cation radicals after selective deuteration and comparison of their ESR-, ENDOR- and TRIPLE-resonance spectra with those of the non-deuterated species. They are formed by cyclic condensation of two molecules with subsequent oxidation.
Analogues of Methyl D̲-Ribo-and D̲-Arabino-furanosides Having Phosphorus in the Anomeric Position+
Authors: Wróblewski Andrzej E. 
Published: March 2015

Abstract
Acid-catalysed cyclisation of (1S̲J-and (1R̲)-1-C̲-(dimethoxyphosphinyl)-D-erythritols gave exclu­sively P-epimeric analogues of methyl D-ribo- and D-arabino-furanosides with phosphorus in the anomeric position.
Bis[tetraethylammonium]-meso-bis[dichloro-μ-chloro-oxo-aquavanadat(IV)], [(C2H5)4N]2[{VOCl2(OH2)}2(μ-Cl)2]: Molekülstruktur und spektroskopische Charakteristika/ Tetraethylammonium raeso-Bis[dichloro-μ-chloro-oxo-aquavanadate(IV)], [(C2H5)4N]2[{VOCl2(OH2)}2(μ-Cl)2]: Molecular Structure and Spectroscopic Characteristics
Authors: Priebsch Wolfgang , Weidemann Carola , Rehder Dieter , Kopf Jürgen 
Published: March 2015

Abstract
The title compound crystallizes in the monoclinic space group P21/c with a = 822.0(1), b = 1126.4(2), c = 1629.0(2) pm and β = 103.54(1)°. The two vanadium centers of the anion, which is an edge-bridged bioctahedron, are asymmetrically connected by bridging chloroligands; V -(μ -Cl) bond lengths are 238.4 und 278.3 pm , respectively. ESR and IR characteristics are discussed.
Diphenyl[mono(per)fluoracyI- und aroyl(oxy)]phosphan(oxid)e – neue Synthesen, neue Verbindungen/ Diphenyl[mono(per)fluoroacyl- and aroyl(oxy)]phosphan(oxid)es – New Synthetic Methods, New Compounds
Authors: Hennig Heinz-Werner , Neu Peter , Sartori Peter 
Published: March 2015

Abstract
Diphenylpentafluorobenzoyloxyphosphane 2 a was prepared by reacting diphenylchlorophosphane with sodium pentafluorobenzoate. Reaction of diphenylchlorophosphane with sodium salts of trifluoroacetic acid and of 4-ethoxy-2,3,5,6-tetrafluorobenzoic acid leads to diphenyl trifluoroacetyl phosphane oxide 3b and to diphenyl 4-ethoxy-2,3,5,6-tetrafluoro benzoyl phosphane oxide 3 e. IR data, 19F and 31P {1H } NMR data are given.
Interpretation of Substituent Angular Parameters of Monosubstituted Benzenes by Means of ab initio STO-3G Fully Optimized Molecular Structures and Charges Densities. Part VI of the Series: “Crystallographic Studies and Physicochemical Properties of π-Electron Systems”
Authors: Krygowski Tadeusz Marek , Häfelinger Günter , Schüle Josef 
Published: March 2015

Abstract
The angular variations of molecular structures calculated for 17 monosubstituted derivatives of benzene by use of ab initio analytical gradient optimization at the STO -3G level have been correlated by multiple linear regression analysis with Mulliken σ- and π-electron charge densities at corresponding ring carbon atoms. Variations of angles γ at meta positions are solely due to π-electron effects (R = 0.961). Changes in angles β at ortho positions are independent of σ- or π-electron effects but may be related to steric effects (R = 0.719) alone or additionally to charge densities on ortho protons (for dual regression R = 0.846). Angles a at ipso atom s depend significantly on both, σ- and π-electron charge densities in the ratio of 70% to 21% with R = 0.974 for dual regression. Variations of angles δ para-positions depend on all three effects considered (with correlation coefficient for a triple regression R = 0.951) in the ratio 37.6% :2 8 .3% : 34.1% for steric effects, σ- and π-electron charge densities, respectively.
Die Photoreaktion von Re2(CO)10 mit Ethylen und Ethylenderivaten/ The Photoreaction of Re2(CO)10 with Ethylene and Ethylene Derivatives
Authors: Kreiter Cornelius G. , Franzreb Karl Heinz , Sheldrick William S. 
Published: March 2015

Abstract
Re2(CO)10 (1) has been photolyzed at reduced temperature in the presence of ethylene (2), styrene (3) or 2-methyl-1,3-butadiene (4), respectively. Main products of these reactions are the octacarbonyl-μ-hydrido-μ-η2:1-olefinyl-dirhenium (6, 9, 12, 13, 15) and tridecacarbonyl-μ-η2:1- olefinyl-trirhenium complexes (7, 14, 16). In lesser amounts, three isomeric undecacarbonyl-μ- hydrido-bis(μ-η2:1-vinyl)trirhenium com pounds (8 a, 8 b, 8 c), enneacarbonyl-η2-ethylenedirhenium (5) and three octacarbonyl-η4-diene-dirhenium complexes (10,17,18) are formed. The reaction products were separated by HPL chromatography. They were characterized by IR and NM R spectroscopy (1H , 13C) and by C, H elemental analyses. The molecular and crystal structure of tridecacarbonyl-η2:1-E-3-methyl-1,3-butadien-1-yl-trirhenium was determined by X-ray structure analysis.
Phosphorverbindungen ungewöhnlicher Koordination, 13. Abfangreaktionen von Phenyl-thioxophosphan durch [4+1]-CycIoaddition mit o-Chinonen/ Phosphorus Compounds with Unusual Coordination, 13 [1] Trapping Reactions of Phenyl Thioxophosphane by [4+1] Cycloaddition with o-Quinones
Authors: Hussong Rita , Heydt Heinrich , Regitz Manfred 
Published: March 2015

Abstract
Phenyl thioxophosphane (1) - generated by thermal cycloreversion from 7 along with the dihydropyridazine 8 - is trapped by [4+1] cycloaddition with the o-quinones 9a-f by formation of the dioxaphospholsulfides 10a-f. Solvolysis of 10a-c, e and f with m ethanol yields the phenol derivatives 12a-e (in the case of 10b the isomer 12b′ is formed, too). This reaction is reversible (12a-c→10a-c) and accompanied by formation of the isomers 13a-c. The phenanthrene quinone methanide 14 is also suitable for the trapping reaction of 1 (→15→17).
Studies on the Chemical Constituents of Azadirachta indica A. Juss (Meliaceae), Part VII
Authors: Siddiqui Salimuzzaman , Faizi Shaheen , Siddiqui Bina Shaheen 
Published: March 2015

Abstract
A new limonoid, nim bocinol, has been isolated from the fresh, undried, ripe fruits of Azadirachta indica (neem ) along with known com ponents, azadirone, epoxyazadiradione, azadiradione, gedunin, 17-hydroxyazadiradione and cholesterol. It is the first report of the isolation of cholesterol from any part of the neem tree.
Notizen: Eine neue Synthese und das IR-Spektrum von [SNBr0,4]x/ A New Synthesis and the IR Spectrum of [SNBr0,4]x
Authors: Demant Udo , Dehnicke Kurt 
Published: March 2015

Abstract
[SNBr0,4]x was prepared by the reaction of trithiazyl chloride with BrSiMe3 in CH2Cl2 solution at -60 °C. The IR spectrum is recorded and discussed. The mass spectrum is in agreement with samples prepared by other pathways.
Die Kristallstruktur von [Mg(H2O)6](N3)2 / The Crystal Structure of [Mg(H2O)6](N3)2
Authors: Mautner Franz A. , Krischner Harald , Kratky Christoph 
Published: March 2015

Abstract
The crystal structure of [Mg(H2O)6](N3)2 was determined by single crystal X-ray diffraction (421 independent observed MoKα-counter reflections. R = 0.037). The crystals are orthorhombic, space group Fmmm, Z = 4, a = 644.3(1), b = 1134.4(1), c = 1333.5(3) pm. The magnesium atoms are octahedrally coordinated to six oxygen atom s of water molecules, the azide groups are not coordinated to metal atoms, N -N = 117.0(2) pm.
YCoC and Isotypic Carbides with a New, Very Simple Structure Type
Authors: Gerss Matthias H. , Jeitschko Wolfgang 
Published: March 2015

Abstract
Crystal Structure, Equiatomic Ternary Rare Earth Metal Cobalt Carbides The crystal structure of the new compound YCoC was determined from X-ray powder data. It is tetragonal, space group P42/mmc, with a = 0.36500(4) nm, c = 0.68636(9) nm and Z = 2 formula units per cell. The residual for a refinement of Debye-Scherrer data is R = 0.048 for 22 structure factors and 3 variable parameters. The structure is of a new type with no variable positional parameter. The arrangement of the metal atoms corresponds to that of the CsCl structure. The tetragonal superstructure with a doubled c axis arises through the ordered insertion of carbon atoms on octahedral sites formed by four Y and two Co atoms. The hydrolysis of YCoC in hydrochloric acid yields mainly methane, propane, and ethane. The compounds LnCoC (Ln = Gd -Tm, Lu) are isotypic with YCoC.
Chemie und Strukturchemie der Phosphide und Polyphosphide, 41 Synthese, Struktur und Eigenschaften neuer silyl-, germyl- und stannylsubstituierter Heptaphosphane(3) P7(MPh3)3 mit M = Si, Ge, Sn / Chemistry and Structural Chemistry of Phosphides and Polyphosphides, 41 Synthesis, Structure and Properties of New Silyl, Germyl and Stannyl Substituted Heptaphosphanes(3) P7(MPh3)3 with M = Si, Ge, Sn
Authors: Mujica Carlos , Weber Dieter , Schnering Hans-Georg von 
Published: March 2015

Abstract
, 41 [1] Synthese, Struktur und Eigenschaften neuer silyl-, germyl-und stannylsubstituierter Heptaphosphane(3) P7(MPh3)3 mit M = Si, Ge, Sn Chemistry and Structural Chemistry of Phosphides and Polyphosphides, 41 [1] Synthesis, Structure and Properties of New Silyl, Germyl and Stannyl Substituted Heptaphosphanes(3) P7(MPh3)3 with M = Si, Ge, Sn Silyl-, Germyl-and Stannyl-substituted H eptaphosphanes(3), 3,5,7-T riphenylm etalla[2.2.1.02'6]hepta-phosphanes, Structures, Raman Spectra, 31P NM R Spectra New derivatives P7(M Ph3) 3 (M = Si, G e, Sn) o f the heptaphosphanortricyclen cage were synthesized by reactions o f P7(SiM e,) 3 with com pounds CIMPh,. The driving force o f the reaction is the lower solubility o f the P7(M P h,) 3 com pounds. W hereas crystals of P7(SiM e3) 3 are enan-tiom orphs, the new com pounds P7(M Ph3) 3 crystallize as racemates. With decreasing M size, the nortricyclen cage P7 is slightly twisted about the 3-fold axis. The main P -P bond lengths in the cage follow the relation A (basal) — 221.8 pm > B (basal-equatorial) = 219.0 pm > C (equato-rial-apical) = 218.5 pm. The m ean bond lengths P —Si = 228.6 and P —Ge = 234.9 and P —Sn = 253.5 pm are slightly larger than the standard single bond distances. The IR absorptions show only very small M -dependent variations in the characteristic internal cage vibrations. Similar effects are recognized in the 3,P NM R chem ical shifts.