M. Sarakha et al., MECHANISM OF (MU-H)(MU-ALKENYL)RE-2(CO)(8) FORMATION IN 350NM FLASH IRRADIATIONS OF RE-2(CO)(10), Inorganic chemistry, 35(13), 1996, pp. 3804-3807
The mechanism of (mu-H)(mu-alkenyl)Re-2(CO)(8) formation upon UV irrad
iations of Re-2(CO)(10) in presence of olefin (styrene, trans-stilbene
, 4-methyl-1-cyclohexane, and ethylene) was investigated by laser flas
h photolyses. Such photoproducts result from reactions of the olefin w
ith eq-Re-2(CO)(9). No reactions of Re(CO)(5) leading to hydride alken
yl products were observed. Dependences of the reaction rate on olefin
concentration and solvent revealed an additional intermediate formed a
fter the addition of the olefin to eq-Re-2(CO)(9) and before the appea
rance of the mu-hydrido-mu-alkenyl products.