Spectroscopic studies on organometallic compounds. Part XVI. Infrared spectra of organotin(carbonyl)iron complexes in the carbonyl stretching region

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Abstract
An analysis has been made of the carbonyl stretching frequencies of complexes of formula [R2MFe(CO)4]2(M = Si, Ge, Sn, or Pb), [R2SnCl]2Fe(CO)4, (R3Sn)2Fe(CO)4, R4M3[Fe(CO)4]4(M = Sn or Pb), and M[Fe(CO)4]4(M = Ge, Sn, or Pb). Force constants have been calculated and their significance discussed.