Synthesis and structures of the mononuclear iron(II) dialkyl FeR2 and the iron(II) dithiolate complex [Fe(SAr)2(RH)] [R = C(SiMe3)2C5H4N-2; Ar = 2,4,6-tBu3C6H2]
作者:Hung Kay Lee、Bao-Sheng Luo、Thomas C.W. Mak、Wing-Por Leung
DOI:10.1016/0022-328x(94)05254-9
日期:1995.3
The thermally stable iron(II) dialkyl, 1 was obtained in good yield from [LiR]2 and FeCl2. Reaction of 1 with ArSH yielded the novel neutral mononuclear iron(II) dithiolate complex2. An X-ray diffraction study revealed that the alkyl ligands in 1 are bonded to the metal center in a chelating manner, whereas in 2 one alkyl ligand has been converted into a neutral alkane species by ArSH, but remains
Pyridine-functionalized metal alkyls—II. Synthesis, crystal structures and electronic properties of first-row transition metal 2-pyridino(bistrimethylsilyl)methyls and 2-pyridino(trimethylsilyl)methyls
作者:Michael B. Hursthouse、Keith J. Izod、Majid Motevalli、Peter Thornton
DOI:10.1016/0277-5387(95)00099-e
日期:1996.1
The new chromium(II), manganese(II), iron(II) and cobalt(II) alkyls derived from the anions of 2-bis(trimethylsilyl)methylpyridine (Hbtsmp) and 2-trimethyl-silylmethylpyridine (Htsmp) are described. X-ray crystal structures show that [M(btsmp)(2)] (M = Cr, Co) have square-planar geometry, but that [Fe(btsmp)(2)] has a distorted tetrahedral structure. Magnetochemical studies show [Mn(btsmp)(2)] exhibits a (2)E-(6)A spin state equilibrium. Solid-state effects are discussed in the interpretation of differences between solid and solution state magnetochemical data of the Cr and Co compounds of btsmp. The ESR spectrum of the latter is also analysed. Reactions of CO and Bu(t)NC with the Cr and Co compounds are described. Evidence for the formation of a zirconium(III) species from 2-methylpyridine is assessed.