preparation of KHCr(CO)5 is described. The use of a potassium cation in the coordination chemistry of the [HFe(CO)4]−anion is completed and extended to the coordination chemistry of the [HCr(CO)5]−anion: CO-substitution by phosphites, phosphines and phosphinites, and H-abstraction by aminophosphines. Most of the observed differences in reactivity between KHFe(CO)4 and KHCr(CO)5 can be rationalized
On the coordination chemistry of corannulene, the smallest “buckybowl”
作者:Michael W. Stoddart、John H. Brownie、Michael C. Baird、Hartmut L. Schmider
DOI:10.1016/j.jorganchem.2005.04.044
日期:2005.7
A variety of methods, conventional and non-conventional, are used in attempts to prepare the compounds (eta(6)-corannulene)M(CO)(3) (M = Cr, Mo, W), all unsuccessful. Conventional methods are also utilized in attempts to prepare the compound [CpFe(eta(6)-corannulene)]PF6, but these result in mixtures of cationic CpFe(arene) complexes containing partially hydrogenated corannulene; similar results have been reported for other polyaromatic hydrocarbons. DFT calculations on the compound (eta(6)- corannulene)Cr(CO)(3) suggest that the (eta(6)-corannulene)-Cr linkage is only a few kcal/mol weaker than the corresponding bond in (eta(6)-benzene) Cr(CO)(3), implying that failures in syntheses arise from kinetic, not thermodynamic problems. (c) 2005 Elsevier B.V. All rights reserved.
Assembling Process of Charged Nonanuclear Cationic Lanthanide(III) Clusters Assisted by Dichromium Decacarbonyl Hydride
The reaction of Ln(acac)(3)(.)3H(2)O (Ln = Sm, Eu, Gd, Dy, Yb) with K[Cr-2(CO)(10)(mu-H)] at different molar ratios and solvents leads to the formation of nonanuclear lanthanide hydroxo acetylacetonate complexes of general formula [Ln(9)(OH)(10)(acac)(16)][HCr2(CO)(10)]. The compounds are isomorphous, and the common cationic cluster core consists of a novel square antiprismatic arrangement of nine Ln atoms connected by mu(3), mu(4) hydroxo bridges and/or by acetylacetonate ligands as it results from the single-crystal X-ray analysis of the Sm derivative for which the most suitable crystals were obtained.
Darensbourg, Donald J.; Darensbourg, Marcetta Y.; Walker, Nyal, Inorganic Chemistry, 1981, vol. 20, # 6, p. 1918 - 1921
作者:Darensbourg, Donald J.、Darensbourg, Marcetta Y.、Walker, Nyal