Organo-Tricyanoborates as Tectons: Illustrative Coordination Polymers Based on Copper(I) Derivatives
作者:Haijun Yao、Matthew L. Kuhlman、Thomas B. Rauchfuss、Scott R. Wilson
DOI:10.1021/ic0506153
日期:2005.9.1
The first systematic study on the use of tricyanoborates as ligands is presented. The tricyanoborates [RB(CN)(3)](-)(R = oct and Ph) can be prepared by direct cyanation of RBCl2 precursors as well as by thermolysis of the corresponding isocyanides [RB(NC)(3)](-). The first organo-cyanogallates [RGa(CN)(3)](-) (R = Bu, C6H2-2,4,6-Me-3) were prepared from the corresponding dichloride, the structure of Et4N[mesGa(CN)(3)] being confirmed crystallographically. The reaction of equimolar [RB(CN)(3)](-) (R = oct, Ph) and [Cu(MeCN)(4)](+) afforded two-dimensional polymers [RB(CN)(3)CU(NCMe)]. The sheets arise via conjoined hexagonal B3CU3(CN)6 rings with chair conformations. The reaction of excess [PhB(CN)(3)](-) and [Cu(MeCN)(4)](+) gives the polymer [K(18-crown-6)]Cu[PhB(CN)(3)](2)}. Treatment of [PhB(CN)(3)](-) with [CU(PCy3)(2)(NCMe)(x)]PF6 gave the one-dimensional polymer [PhB(CN)(3)CU(PCy3)(2)], wherein two of the three BCN substituents are coordinated.
Synthesis and characterization of n-butyl- and methyl[(trimethylsilyl)amino]gallium chloride
作者:W. Rodger Nutt、Rebecca E. Stimson、Mary F. Leopold、Byron H. Rubin
DOI:10.1021/ic00135a040
日期:1982.5
Bis(dimethylamido) Complexes of Alkyl- and Phenylgallium. Useful Precursors to the RGa<sup>2+</sup> Synthon
作者:Jolin A. Jegier、Bing Luo、Carrie E. Buss、Wayne L. Gladfelter
DOI:10.1021/ic010724r
日期:2001.11.1
Alkyl- and phenylbis(dimethylamido)gallium, [RGa(NMe2)(2)](2) [R = Me (1), Et (2), Bu-n (3), (n)Hx (4), and Ph (5)], were synthesized by reactions of LiNMe2 with (RGaCl2)(2). The crystal structure of compound 1 was a disordered mixture of anti and syn isomers, with the ratio of anti/syn being 64:36, which was consistent with the ratio (57:43) found in the H-1 NMR spectrum. The Ga2N2 cores of the anti and syn structures were nonplanar. H-1 NMR spectra indicated the presence of both anti and syn isomers for all of the other substituents. H-1 NMR and mass spectra indicated that a species with the general formula of R3Ga2(NMe2)(3) was formed when these compounds were heated at high temperatures.