Electronic absorption and 8.0 T magnetic circular dichroism (MCD) spectra are reported for Pt(P(t-Bu)(3))(2) in 2-methylpentane solutions at 295 K and in glasses at 80 K. The intense bands observed in the 2.4-5.0 mum(-1) (1 mum(-1) = 10(4) cm(-1)) region are assigned as 5d --> 6p/metal-to-ligand charge-transfer transitions to dipole-allowed Sigma (+)(u) and IIu spin-orbit states of 5d(10) --> 1 pi (u) excited configurations. The enhanced resolution of the spectra at low temperatures reveals several previously unresolved spectral features in both absorption and MCD spectra, which strengthen the assignments and relative orbital energy ordering concluded from them.