作者:Ya. V. Fedotova
DOI:10.1023/a:1023423202997
日期:——
Iron and cobalt siloxides and germyloxides [(Me3Si)(3)SiO](2)M (M = Fe (1), Co (2)), (Me5Si2O)(2)Fe (3), ((Pr3SiO)-Si-i)(2)M (M = Fe (4), Co (5)), ((Pr3GeO)-Ge-i)(2)Fe (6), (Ph3SiO)(2)Fe (7), (Me3SiO)(2)Fe (8), ((Pr3GeO)-Ge-i)(2)Fe(bpy) (9), and [(Me3Si)(2)NFe(mu-OSi2Me5)(2)](2)Fe.C6H6 (10) were synthesized by the reactions of metal silylamides [(Me3Si)(2)N](2)M (M = Fe, Co) with the corresponding silanols or triisopropylgermanol. The reaction of pentamethyldisilanol with iron(II) silylamide affords either polymeric complex 3 or coordination oligomer 10, depending on the ratio of the reactants. The structures of complexes 9 and 10 were established by X-ray diffraction analysis. The interaction of the prepared compounds with carbon oxides was studied. Low-coordination cobalt siloxide is the only among all prepared compounds that absorbs CO (2 mol) at room temperature and under 1 atm to form an unstable cluster. Compounds 1, 2, and 4-8 react with CO2 to form carbonate complexes, and their reactivity decreases with a decrease in the electron-donating ability of the substituents at the central atom: (Me3Si)(3)SiO > (Pr3GeO)-Ge-i approximate to (Pr3SiO)-Si-i > Me3SiO much greater than Ph3SiO.