Transition metal chemistry V. Calculation of CO stretching force constants of cis disubstituted group VI metal carbonyls and (organo) group IV metal iron carbonyl complexes with lolca C2v symmetry

Abstract

Using the Cotton and Kraihanzel force field, a more exact direct method is applied for calculating the CO stretching force constants of substituted metal carbonyls of general formula cis-L 2M(CO) 4 (M = Mo, W, Cr; L = phosphine or amine) and of complexes of formula [R 2MFe(CO) 4] 2(M = Si, Ge, Sn or Pb),(R 3Sn) 2Fe(CO) 4, R 4M 3[Fe(CO) 4] 4 (M = Sn or Pb) and M[Fe(CO) 4] 4 (M = Ge, Sn or Pb).