Infrared spectra of [Ni(dddt)(2)](3)(HSO4) and [Pd(dddt)(2)](2)X (X=Te
Cl6, AuBr2) are measured at room temperature. Moreover, FT-NIR-Raman s
pectrum of [Ni(dddt)(2)](2)(HSO4)(2) is reported. Electronic and vibra
tional bands are discussed. The strong coupling of electrons with vibr
ations of C=C ring bonds of M(dddt)(2) cations is observed.