ASSIGNMENT OF THE LUMINESCING STATES OF [(AURHI)-RH-I((T)BUNC)(2)(MU-DPPM)(2)][PF6](2)

Fluorescence, phosphorescence, and excitation spectra were measured on the title compound. These results were augmented with polarization ra tios obtained at 77 K and detailed studies of the temperature dependen ce of the phosphorescence in the 77-4 K range. The phosphorescence dec ay rate at 4 K was also recorded as a function of an applied magnetic field. Ah the results are consistent with a 4d(2)Rh(1) --> 6p(z)Au(1) orbital promotion leading to emitting (1)A(1), (3)A(1) terms in pseudo -C-2v symmetry. The (3)A(1) term is split by spin-orbit coupling into a forbidden A(2) state lying lowest followed by a quasi-degenerate pai r, [B-i(x), B-2(y)] lying similar to 16 cm(-1) higher that decays >500 times faster than the lowest one.