64023-44-5Relevant academic research and scientific papers
Organometallic compounds with metal-metal bonds. VII. Preparation and a study of the infrared spectra of mono- and bis(tetracarbonylcobalt) derivatives of germanium and tin
Patmore,Graham
, p. 981 - 988 (2008/10/08)
Infrared spectra in the carbonyl stretching region are reported and discussed for a large number of mono- and bis(tetracarbonylcobalt) derivatives of germanium and tin, most of which are new compounds. The monocobalt derivatives are of the types XnR3-nGeCo(CO)4 (X = Cl, Br, I; R = CH3, C6H5), X3SnCo(CO)4 (X = Cl, I), R3SnCo(CO)4 (R = CH3, C6H5), and (C6H5)3PbCo(CO)4. Assignments are proposed for the three or four terminal stretching bands; a linear increase in frequency of the A1 modes with electronegativity of substituents on germanium or tin is noted. The biscobalt derivatives are of the type XnR2-nM[Co(CO)4]2 (M = Ge, Sn), and two of the seven or eight observed carbonyl bands are tentatively assigned. Nmr spectra are reported for the methyltin derivatives. The compounds are moderately stable in the absence of air, and most are prepared by reaction of Co(CO)4- with halides or organometallic halides of germanium or tin.
