Synthesis and structure of [Bi-2(N(t)Bu)(4)]Li-2(2)center dot 2THF; A bimetallic cubane fragment containing a [Bi-2(N(t)Bu)(4)](2-) anion

被引：21

作者：

Edwards, AJ ^{[1
]}

Beswick, MA ^{[1
]}

Galsworthy, JR ^{[1
]}

Paver, MA ^{[1
]}

Raithby, PR ^{[1
]}

Rennie, MA ^{[1
]}

Russell, CA ^{[1
]}

Verhorevoort, KL ^{[1
]}

Wright, DS ^{[1
]}

机构：

[1] UNIV CAMBRIDGE,CHEM LAB,CAMBRIDGE CB2 1EW,ENGLAND

来源：

INORGANICA CHIMICA ACTA | 1996年 / 248卷 / 01期

关键词：

crystal structures; bismuth complexes; imido complexes; cubane complexes;

D O I：

10.1016/0020-1693(95)04974-6

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The imido-Bi complex [Bi-2(N(t)Bu)(4)]Li-2 . 2THF (1) has been prepared by the in situ reaction of [(Me(2)N)Bi(mu-N(t)Bu)](2) with [(t)BuNHLi] in toluene/THF solution. The complex has been characterised by elemental analysis, solid-state IR spectroscopy, H-1 NMR spectroscopy in solution, and by a low-temperature (153 K) X-ray diffraction study. The complex crystallises in the monoclinic space group P2(1)/n, with cell dimensions a = 11.158(2), b = 16.777(3), c = 17.239(3) Angstrom, beta = 92.45(3)degrees, V = 3224.2(10) Angstrom(3) and Z = 4. Molecules of 1 consist of discrete [Bi2Li2N4] cubane units in the solid state. Further association of these units into a structure akin to the previously characterised complex [Sb-2(NCy)(4)]Li-2(4) (2), consisting of a cage of two interlocked 'broken cubes', is prevented by Lewis base solvation of Li. Solution NMR and cryoscopic studies of 2 show that the complex is involved in a dissociative equilibrium in which separate cubane units, similar to those identified in 1, are formed.

引用

页码：9 / 14

页数：6

共 39 条

[1] SYNTHESIS AND STRUCTURE OF [SB2LI2(N(C6H11))4]2 - A CAGE COMPLEX CONTAINING A CORE OF 2 INTERLOCKED BROKEN CUBES [J].