VIBRATIONAL-SPECTRA OF SOLID, MOLTEN AND MATRIX-ISOLATED ANTIMONY TRIBROMIDE, SBBR3

The condensed phase and matrix isolation IR and Raman spectra of antim ony tribromide are reported. The solid-state spectrum comprises bands assignable to both molecular SbBr3 and ionic SbBr6- species. The frequ ency shifts and mode sequence in the melt spectrum indicate strong dip ole-dipole interactions. The matrix isolation spectra show bands of mo nomeric SbBr3 and of its centrosymmetric dimer, but no features of coo perative interactions. A ''bond fluctuation'' explanation, previously forwarded for antimony trichloride,is considered to be further substan tiated by the present findings. Copyright (C) 1997 Elsevier Science Lt d.