15489-58-4Relevant academic research and scientific papers
Mixed complexes of group VIb metal carbonyls
Houk, Larry Wayne,Dobson, Gerard R.
, p. 2119 - 2123 (2008/10/08)
Forty-nine new mixed derivatives - which contain two different noncarbonyl substituent groups - of the group VIb metal carbonyls are reported. These are of the types M(CO)3X2Y and M(CO)2X2Y2 where M = Cr, Mo, W; X2 = 2,2′-dipyridyl (dipy) or o-phenanthroline (phen); and Y = various monodentate Lewis bases. Carbonyl stretching frequencies for many derivatives containing strongly π-accepting Y ligands yield complex Cotton-Kraihanzel force constants; real force constants may be obtained if the two physically different cis-CO-CO interactions are differentiated in a physically reasonable way. Evidence is presented that N,N′-dimethylformamide (DMF) and acetamide exhibit normal coordination through oxygen in the complexes Mo(CO)3(phen)(DMF) and Mo(CO)3(phen)(acetamide).
