James K. Hoyano

Photochemistry of (η-C5Me5)Re(CO)3: preparation and X-ray crystal structure of (η-C5Me5)2Re2(µ-CO)3

Ultraviolet irradiation of (η-C5Me5)Re(CO)3 forms the stable complexes (η-C5Me5)Re2(µ-CO)(Co)4 and (η-C5Me5)2Re2(µ-CO)3; the length of the formal Re–Re triple bond in the latter is determined by X-ray diffraction to be 2·411 (1)A.

Photo-activation of methane at 12 K by (η5-cyclopentadienyl)- and (η5-pentamethylcyclopentadienyl)-dicarbonyl-rhodium and -iridium complexes

I. r. spectroscopic evidence, including 2H labeling, is presented to show that photolysis of [(η6C6R6)M(CO)2] complexes (M = Rh, R = Me; M = Ir, R = H, Me) in CH4 matrices at 12 K leads primarily to [(η6-C6R6)M(CO)(H)(Me)] species whereas in Ar and N2 matrices only small yields of [(η5-C5R5)M(CO)] species are observed.