作者:David N. Williams、Jonathan P. Mitchell、Andrew D. Poole、Ulrich Siemeling、William Clegg、David C. R. Hockless、Paul A. O'Neil、Vernon C. Gibson
DOI:10.1039/dt9920000739
日期:——
[Nb(η-C5R5)Cl4] with NMe(SiMe3)2 in acetonitrile. The sterically hindered alkyl- and aryl-imido analogues [Nb(η-C5H5)(NR)Cl2](R = But1c, or C6H3Pri2-2,6 1d), [Nb(η-C5Me5)(N-C6H3Pri2-2,6)Cl2]1e and the tantalum compound [Ta(η-C5Me5)(N-C6H3Pri2-2,6)Cl2]1f are obtained by treatment of [M(η-C5R5)Cl4] with two equivalents of NHR(SiMe3) in chlorocarbon solvent. Crystal structures of 1a, 1c, 1d and 1f show that these complexes
半夹心methylimido配合物[铌(η-C 5 - [R 5)(NME)氯2 ](R = H 1a中,或Me 1B)已经被制备治疗[铌(η-C 5 - [R 5)氯4 ]与NMe(SiMe 3)2在乙腈中的溶液。空间位阻的烷基-和芳基-亚氨基类似物[铌(η-C 5 H ^ 5)(NR)氯2 ](R =卜吨1c中,或C 6 H ^ 3镨我2 -2,6 1D),[Nb的(η-C 5我5)(NC6 ħ 3镨我2 -2,6)氯2 ] 1E和钽化合物[TA(η-C 5我5)(NC 6 H ^ 3镨我2 -2,6)氯2 ] 1F是通过处理而得到的[M(η-C 5 - [R 5)氯4 ]与NHR两个当量(森3在氯烃溶剂)。1a, 1c, 1d和1f的晶体结构表明这些配合物是单核的,具有准线性的亚氨基配体。金属-氮键的距离范围为1.744(3)至1.780(5)Å,与伪三键一致。化合物1A - 1E与