Complexes with ligands containing nitrile groups. Part III. Infrared spectra of coordinated methyl cyanide

Infrared spectra are reported of methyl cyanide coordinated to the monovalent cations, Li, Na, K, Rb, Cu, Ag, Au, Tl and the divalent cations, Be, Mg, Ca, Sr, Ba, Mn, Fe, Co, Ni, Cu, Zn, Cd, Pd, in complexes of the types M (CH3CN)pn+ (SbCl6)n‐ and M (CH3CN)pn+ (SnCl6)n/22−. The shifts in the different bands are discussed. Metal ions are placed in a series of electronegativity towards methyl cyanide. The sequence is compared with ionization energies of the metals, and with other measures of metal electronegativity.