SOLVATOCHROMIC AND SUBSTITUENT EFFECT ON ELECTRONIC ABSORPTION OF ARENETRICARBONYLCHROMIUM(0) COMPLEXES

A number of arenetricarbonylchromium(0) complexes, [(η 6 -arene)Cr(CO)3], in which arene = benzene, chlorobenzene, phenyltrimethylsilane, and acenaphthene were synthesized. Electronic absorptions of these complexes were recorded in various solvents, ranging from polar to non polar ones; i.e. methanol, methylene chloride, chloroform, benzene, and isooctane. These chromium tricarbonyl complexes show lowest electronic absorption in the energy range of 313 – 320 nm, with relatively high intensity (e = 0,9 – 2,0 x 10 4 M -1 cm -1 ). Detailed discussion of the solvent and substituent effect on electronic absorption of these complexes are presented in this article.