Explain the origin of the difference in the wavenumber values for the CO IR absorptions shown by the following two compounds: [Ag(CO)4]
+ at 2118 cm-1 and Ni(CO)4 at 2060 cm-1

Explain the origin of the difference in the wavenumber values for the CO IR
absorptions shown by the following two compounds: [Ag(CO)4]
+
at 2118 cm-1 and
Ni(CO)4 at 2060 cm-1