Nickel complexes of a bulky β-diketiminate ligand

被引：82

作者：

Eckert, NA ^{[1
]}

Bones, EM ^{[1
]}

Lachicotte, RJ ^{[1
]}

Holland, PL ^{[1
]}

机构：

[1] Univ Rochester, Dept Chem, Rochester, NY 14627 USA

来源：

INORGANIC CHEMISTRY | 2003年 / 42卷 / 05期

关键词：

D O I：

10.1021/ic025986n

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Nickel(II) chloride forms a complex with tetrahydrofuran, NiCl2(THF)1,5, that can be used to prepare nickel chloride complexes of a bulky beta-diketiminate ligand L-Me. [(LNiCl)-Ni-Me](2) and (LNiCl2LiTHF2)-Ni-Me, which have tetrahedral geometries in the solid state, are in equilibrium with three-coordinate (LNiCl)-Ni-Me. Thermodynamic parameters for the equilibrium between [(LNiCl)-Ni-Me](2) and (LNiCl)-Ni-Me are DeltaH= 51(5) kJ/mol and DeltaS = 116(11) J/(mol.K). (LNiCl)-Ni-Me forms a tetrahydrofuran complex with a binding constant of 1.2(2) M-1 at 21 degreesC. The chloride complexes were used to generate a three-coordinate nickel(II)-amido complex. This amido complex, (LNiN)-Ni-Me(SiMe3)(2), is compared with (LMN)-M-Me(SiMe3)(2) (M = Mn, Fe, Co) (Panda, A.; Stender, M.; Wright, R. J.; Olmstead, M. M.; Klavins, P.; Power, P. P. Inorg. Chem. 2002, 41, 3909-3916). Trends in the metrical parameters of the three-coordinate (LMII)-M-Me amido compounds are similar to the trends in three-coordinate (LMII)-M-tBu chloride compounds.

引用

页码：1720 / 1725

页数：6

共 33 条

[1] The chemistry of β-diketiminatometal complexes [J].