ChemInform Abstract: DOUBLE YLIDES, IV. SYNTHESIS, PROPERTIES, AND AN X-RAY STRUCTURE ANALYSIS OF NITRIDOBIS(DIMETHYLPHOSPHONIUM METHYLIDE) COMPLEXES OF SOME D8- AND D10-TRANSITION METALS (NICKEL, PLATINUM, GOLD, ZINC, CADMIUM)

1978 ◽  
Vol 9 (2) ◽  
Author(s):  
H. SCHMIDBAUR ◽  
H.-J. FUELLER ◽  
V. BEJENKE ◽  
A. FRANCK ◽  
G. HUTTNER
Keyword(s):  
Transition Metals ◽  
Structure Analysis ◽  
X Ray ◽  
Synthesis Properties ◽  
Zinc Cadmium ◽  
Nickel Platinum

σ-Ferrocenyl-Komplexe der frühen Übergangsmetalle – Synthese und Struktur / σ-Ferrocenyl Complexes of the Early Transition Metals – Synthesis and Structure

1988 ◽  
Vol 43 (11) ◽  
pp. 1461-1467 ◽  
Author(s):  
Michael Wedler ◽  
Herbert W. Roesky ◽  
Frank T. Edelmann ◽  
Ulrich Behrens
Keyword(s):  
Transition Metals ◽  
Structure Analysis ◽  
Monoclinic Space Group ◽  
Substitution Product ◽  
Carbon Bond ◽  
Space Group ◽  
X Ray ◽  
Sterically Demanding ◽  
Cp Ti ◽  
Early Transition

Abstract Ferrocenyllithium, FcLi (1), reacts with (C5H4CH3)2TiCl2, CpTiCl, and Cp*TiCl 3 to give the new σ-ferrocenyl complexes (C5H4CH3)2TiFc2 (2), CpTiFc3 (3) and Cp*Ti(Fc)2Cl (4), respectively. Treatment of Cp*2ZrCl2 with FcLi yields the mono-substitution product Cp*2Zr(Fc)Cl (5), which has been characterized by an X-ray structure analysis. Compound 5 crystallizes in the monoclinic space group P21/c (a = 1622.3(6), b = 995.0(2), c = 1664.3(6) pm; β = 94.78(3)°; Z = 4). Due to the sterically demanding pentamethylcyclopentadienyl ligands 5 contains a long zirconium-carbon bond (231.4(8) pm) and the Cp rings of the ferrocenyl substituent are tilted by 10.2°. The syntheses of CpZrFc3 (6), Cp*HfFc3 (7) and Cp2VFc2 (8) are also described.

Iminoacetylacetonat-Komplexe der Lanthanoide: Synthese, Eigenschaften und Struktur / Iminoacetylacetonate Complexes of Lanthanides: Synthesis, Properties and Structure

1993 ◽  
Vol 48 (12) ◽  
pp. 1753-1759 ◽  
Author(s):  
Karl-Heinz Thiele ◽  
Annett Scholz ◽  
Joachim Scholz ◽  
Uwe Böhme ◽  
Rhett Kempe ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Organic Solvents ◽  
Structure Analysis ◽  
Chelate Complexes ◽  
Space Group ◽  
X Ray ◽  
Synthesis Properties ◽  
Lanthanum Complex

The reactions of (η5-C5Me5)2Ln(μ-Cl)2ML2 (Ln = Y, La, Lu; M = Li, K; L = Et2O, dme) 3a-c with the sodium iminoacetylacetonates 2a-b yield monomeric metallocene chelate complexes , (Ln = Y, La, Lu; R = C6H5, C6H4-4-Me) 4a-d which have been characterized by IR, NMR and mass spectrometry. In the case of the lanthanum complex 4c, the chelating structure was confirmed by an X-ray structure analysis. 4c crystallizes monoclinically in space group P21/c with a = 10.232(3), b = 10.216(1), c = 29.047(7)Å, α = γ = 90.0°, β = 97.76(3)°, Ζ = 4, and R = Rw = 0.0378 for 4026 observed reflections. The new complexes are sensitive to oxygen and moisture and soluble in all common organic solvents.

Peculiarities of the 35Cl and 79Br NQR Spectra of Chalcogenhalide Complexes of Some Transition Metals

1997 ◽  
Vol 52 (6-7) ◽  
pp. 517-520 ◽  
Author(s):  
Z.A. Fokina ◽  
V.L. Kolesnichenko ◽  
V.l. Pekhnyo ◽  
S.V. Volkov
Keyword(s):  
Electronic Structure ◽  
Transition Metals ◽  
Structure Analysis ◽  
Metal Atom ◽  
Low Frequency ◽  
Coordination Polyhedra ◽  
X Ray ◽  
Dimeric Structure ◽  
Structure Of Metal ◽  
79Br Nqr

Abstract The peculiarities of the 35Cl, 79Br NQR spectra of the chalcogenhalide complexes are explained in terms of intraspheric effect of ligands, formation of secondary intra-and intermolecular bonds, and electronic structure of metal atom. In the 35Cl spectra of [TeCl3 ]2[OsCl6 ] 1, [SeCl3]2[OsCl6]2 and [TeCl3]2 [ReCl6 ]3 the 7-10% increase in frequency in the low-frequency multiplet are accounted for by the disturbance of the pHal-dM π-interaction due to the formation of the peripheral coordination polyhedra [SeCl6 ] and [TeCl6 ]. The peculiarities of the 35 Cl and 79 Br spectra of [MoS2 Cl3 (SeCl2)]2 4, [MoS2 Br3 (SeCl2)]2 5, [WS2Cl3 (SeCl2)]2 6 and [WS2 Br3 (SeBr 2)] 2 7 are attributed to the disturbance of the pHal-dM π-interaction under the influence of the coordination of the SeCl2 and SeBr2 ligands and formation of secondary intramolecular bonds. For [RhCl3 (SeCl2)2]2 8, [IrCl3 (SeCl2)2]2 9 and [SCl3 ][IrCl4 (SCl2)2]10, the appearance of frequencies at 25 MHz in low-frequency triplets is attributed to the intraspheric effect of weak donors-neutral SCl2 and SeCl2 molecules; the frequencies at 18 MHz are assigned to bridging chlorine atoms. This assignment was confirmed by the dimeric structure, which was established by an X-ray structure analysis.

Tungsten(VI) selenide tetrachloride, WSeCl4 - synthesis, properties, coordination complexes and application of [WSeCl4(SenBu2)] for CVD growth of WSe2 thin films

2022 ◽  
Author(s):  
Victoria K. Greenacre ◽  
Andrew L. Hector ◽  
Ruomeng Huang ◽  
William Levason ◽  
Vikesh Sethi ◽  
...  
Keyword(s):  
Thin Films ◽  
Structure Analysis ◽  
Good Yield ◽  
Coordination Complexes ◽  
X Ray ◽  
Synthesis Properties ◽  
Cvd Growth

WSeCl4 was obtained in good yield by heating WCl6 and Sb2Se3 in vacuo. Green crystals grown by sublimation were shown by an X-ray structure analysis to contain square pyramidal monomers...

Darstellung, Eigenschaften und Struktur des Cyclopentadienyl(1.3-diborolenyl)nickel-Sandwiehs [1] / Synthesis, Properties and Structure of the Cyclopentadienyl(1,3-diborolenyl)nickel Sandwich [1]

1978 ◽  
Vol 33 (12) ◽  
pp. 1410-1416 ◽  
Author(s):  
Walter Siebert ◽  
Manfred Bochmann ◽  
Joseph Edwin ◽  
Carl Krüger ◽  
Yi-Hung Tsay
Keyword(s):  
Structure Analysis ◽  
Title Compound ◽  
Sandwich Structure ◽  
Unit Cell ◽  
Space Group ◽  
X Ray ◽  
Nmr Data ◽  
Synthesis Properties

Abstract 1,3,4,5-Tetraethyl-2-methyl-1,3-diborolene (5) reacts with nickelocene and dimeric cyclopentadienylcarbonylnickel, yielding orange red 4 a, a diamagnetic nickelocene analogue. 1H and 11B NMR data indicate a sandwich structure, which is confirmed by X-ray structure analysis. The title compound crystallizes in the space group Pnma with a = 9.265(I), b = 15.1343(9), c = 12.777(2) Å and four molecules in the unit cell. All metal carbon distances are similar to those of the isoelectronic ferrocene.

Absolute Stereochemistry of (-)-Wieland-Miescher Ketone as Established by the X-ray Crystallographic and CD Exciton Chirality Methods

1992 ◽  
Vol 57 (7) ◽  
pp. 1459-1465 ◽  
Author(s):  
Nobuyuki Harada ◽  
Tatsuo Sugioka ◽  
Hisashi Uda ◽  
Takeo Kuriki
Keyword(s):  
Structure Analysis ◽  
Absolute Configuration ◽  
X Ray ◽  
The Absolute ◽  
Absolute Stereochemistry

The 8aR absolute stereochemistry of Wieland-Miescher ketone (-)-I was established by the X-ray structure analysis of its bis(4-bromobenzoate) derivatives (1R,6R,8aR)-(+)-IV and (1R,6S,8aR)-(-)-V. The absolute configuration of (-)-I was corroborated further by the application of the CD exciton chirality method to bis(4-bromobenzoates) (+)-IV and (-)-V.

scholarly journals Preparative-scale HPLC Resolution of Metallacyclic η3-Allyltricarbonyliron Complexes and Determination of the Absolute Configuration by X-Ray Crystal Structure Analysis

1999 ◽  
Vol 23 (9) ◽  
pp. 578-579
Author(s):  
Rainer Schobert ◽  
Hermann Pfab ◽  
Jutta Böhmer ◽  
Frank Hampel ◽  
Andreas Werner
Keyword(s):  
Crystal Structure ◽  
Silica Gel ◽  
Structure Analysis ◽  
Absolute Configuration ◽  
Crystal Structure Analysis ◽  
Preparative Scale ◽  
X Ray ◽  
The Absolute

Racemates of (η3-allyl)tricarbonyliron lactone complex Fe(CO)3{η1:η3-C(O)XCH2CHCMeCH2} 1a (X = O) and (η3-allyl)tricarbonyliron lactam complex 2a (X = NMe) are resolved on a preparative scale by HPLC on cellulose tris(3,5-dimethylphenyl)carbamate/silica gel RP-8 and the absolute configuration of (-)-2a is determined by X-ray crystal structure analysis.

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