An investigation into the photochemical reactions of M(η5-C5H5)(CO)4 and M(η5-C9H7)(CO)4 (M = Nb or Ta) with H2 and N2 in polyethylene matrices and liquid xenon at low temperature
Improved synthesis of (η5-CpR)M(CO)4 compounds and the Nujol matrix photochemistry of (η5-C5H5)M(CO)4 and (η5-C9H7)M(CO)4, where M=Nb and Ta
作者:Thomas E Bitterwolf、Skip Gallagher、J.Timothy Bays、Bruce Scallorn、Arnold L Rheingold、Ilia A Guzei、Louise Liable-Sands、John C Linehan
DOI:10.1016/s0022-328x(97)00735-3
日期:1998.4
Improved preparative routes for cyclopentadienyl (Cp) and substituted Cp(CO)4 derivatives of niobium and tantalum and their precursors are described. New compounds are fully characterized by IR, NMR, and elemental analysis. The molecular structures of five compounds were determined: (vinylCp)Nb(CO)4: triclinic, Pı̄, a=6.770(1) Å, b=6.937(1) Å, c=12.706(2) Å, α=90.42(1)°, β=91.07(1)°, γ=105.560(8)°
Kinetics and mechanisms of the ligand substitution of (η5-C9H7)M(CO)4, where M=Nb or Ta, and a reinvestigation of the kinetics of (η5-C5H5)M(CO)4. Molecular structure of (η5-C5H5)Nb(Co)3[P(C6H5)3]
作者:Thomas E. Bitterwolf、Dinara Lukmanova、Skip Gallagher、Arnold L. Rheingold、Ilia A. Guzei、Louise Liable-Sands
DOI:10.1016/s0022-328x(00)00257-6
日期:2000.7
suggested by an earlier kinetic study. The indenyl compounds were found to predominantly react by an associative mechanism. Rate and thermodynamic data indicate that the indenyl effect is operative in these Group V compounds. The molecularstructure of (η5-C5H5)Nb(CO)3[P(C6H5)3]·0.25CH2Cl2 was determined: P1̄, a=10.817(2), b=12.403(2), c=18.962(3) Å, α=100.901(13), β=104.695(10), γ=103.52(2)°, V=2307.6(7)
Anomalous behaviour of [Nb(CO)<sub>6</sub>]<sup>–</sup>and [Ta(CO)<sub>6</sub>]<sup>–</sup>towards protons. Crystal and molecular structure of the organometallic acid [C<sub>4</sub>H<sub>8</sub>OH]<sup>+</sup>[Nb<sub>2</sub>(CO)<sub>8</sub>Cl<sub>3</sub>]<sup>–</sup>·C<sub>4</sub>H<sub>8</sub>O
作者:Fausto Calderazzo、Guido Pampaloni、Pier Francesco Zanazzi
DOI:10.1039/c39820001304
日期:——
Treatment of [M(CO)6]– with HX (X = Cl, AcO) under anhydrpus conditions or in aqueous buffered solution yielded the diamagnetic [M2(CO)8X3]– anions of d4 niobium (I) and tantalum (I); the crystal and molecular structure of the title compound was solved by X-ray diffraction methods, showing that each niobium centre is heptaco-ordinated to four terminal carbonyl groups and to three bridging chlorides.
在无水剂条件下或在缓冲水溶液中用HX(X = Cl,AcO)处理[M(CO)6 ] –产生抗磁性[M 2(CO)8 X 3 ] – d 4铌(I)和阴离子的阴离子钽(I); 用X-射线衍射法分析了标题化合物的晶体和分子结构,结果表明每个铌中心的庚烷配位为四个末端羰基和三个桥连氯化物。
Darstellung und molekülstruktur einer neuartigen σ-alkyl/π-Oxoallyl-tantal-verbindung
作者:Ernst Guggolz、Manfred L. Ziegler、Helmut Biersack、Wolfgang A. Herrmann
DOI:10.1016/s0022-328x(00)96187-4
日期:1980.8
the novel tantalum compound (η5-C5H5)TC(CH3)2]Cl2 has been synthesized by reductive high-pressure carbonylation of (η5-C5H5)TaCl4 and subsequent treatment of the reactive intermediate with mesityl oxide. The σ-alkyl/π-oxoallyl coordination of the oxo ligand has been established by measn of X-ray diffraction methods.
新型钽化合物(η 5 -C 5 H ^ 5)笔C(CH 3)2 ]氯2已经通过(η还原高压羰基合成的5 -C 5 H ^ 5)TACL 4和随后的治疗反应性的与间苯三酚的中间体。通过X射线衍射方法测定了氧代配体的σ-烷基/π-氧代烯丙基配位。
George, Michael W.; Haward, Mark T.; Hamley, Paul A., Journal of the American Chemical Society, 1993, vol. 115, # 6, p. 2286 - 2299
作者:George, Michael W.、Haward, Mark T.、Hamley, Paul A.、Hughes, Catherine、Johnson, Frank P. A.、Popov, Vladimir K.、Poliakoff, Martyn