Crystal structures and vibrational spectroscopy of neutral platinum(IV) amine iodo complexes

A series of platinum(IV) amine iodo complexes of the type [PtL2I4] was synt hesized for the first time and their infrared and Raman spectra were record ed. The crystal structures of cis-[Pt(net)(2)I-4], (net = ethylamine) (spac e group Pnma, a = 14.668(3), b = 8.787(2), c = 11.433(2) Angstrom), trans-[ Pt(net)(2)I-4] (space group C2/c, a = 11.276(2), b = 8.866(2), c = 12.542(3 ) Angstrom, beta = 114.86(3)degrees) and [Pt(en)I-4] (en = ethylendiamine) (space group P1, a = 6.780(1), b = 11.613(2), c = 14.703(3) Angstrom, alpha = 71.87(3), beta = 80.78(3), gamma = 80.08 (3)degrees) were determined. Fo rmation of linear chains of molecules with short intermolecular I-I distanc es was observed for cis[Pt(net)(2)I-4]. The spectroscopic behavior is discu ssed according to these results. (C) 1999 Elsevier Science B.V. All rights reserved.