81533-57-5Relevant academic research and scientific papers
Solution structure and dynamics of Co2(CO)6(L L) and Co4(CO)8(L L)2 molecules
Lisic, Edward C.,Hanson, Brian E.
, p. 812 - 815 (2008/10/08)
The solution structure and dynamics of the molecules Co4(CO)8(L L)2, where L L = bis(diphenylphosphino)methane, bis(dimethylphosphino)methane, and (dimethylphosphino)(diphenylphosphino)methane, have been determined by 13C and 31P NMR spectroscopy. The structure is derived from the C3v, structure of Co4(CO)12 with four CO's replaced by the two di(tertiary phosphines). All eight carbonyls exchange at the same rate, indicating a concerted mechanism for the exchange process. The corresponding dimers, Co2(CO)6L L, are also fluxional in solution, and for these molecules the slow-exchange limit could not be reached. The tetramers are synthesized directly, in high yield, by pyrolysis of the dimers.
