Raman spectra of the molecular donor-acceptor complex {Pt(dbdtc)(2)}C-60 (C-60 fullerene with platinum dibenzyldithiocarbamate) were measured as a function of pressure up to 8 GPa. In the low pressure regime ( P < 0.5 GPa), the phonon modes related to the C-60 molecule split and soften, indicating the formation of intercage covalent bonds. Additional splitting of Raman modes is observed at similar to 2.5 GPa and is attributed to the formation of a polymeric network. The high-pressure phase remains stable upon pressure decrease, however at similar to 0.5 GPa the material transforms to a new phase characterized by a Raman spectrum which is quite different from those of the known polymers of C-60. (C) 2012 Elsevier B.V. All rights reserved.