The photochemistry of [M3(CO)12] (M = Ru 1a or Os 1b) with nitrogen heterocycles has been studied. In all cases photolysis leads to photosubstitution products, the heterocycles inhibiting the photofragmentation pathway. With pyridine (py) 1a formed the orthometallated complex [Ru3H(CO)10(C5H4N)] 2a. With osmium, the simple substitution product [Os3(CO)11(py)] 3b can be isolated. With 2-methylpyridine (mpy) [Ru3H(CO)10(2-MeC5H3N)] 5a and [Os3(CO)11(mpy)] 6b were formed from 1a and 1b respectively. With 2,6-dimethylpyridine no net photoreaction was observed. Photolysis of 1a and 1b with 2,2′-bipyridine led to the formation of [M3(CO)10(bipy)] (M = Ru 7a and Os 7b). The molecular structure of 7b has been obtained by single-crystal X-ray diffraction studies. Photolysis of 1a and 1b with pyridazine (pydz) led to the substituted products [M3(CO)10(pydz)] (M = Ru 8a or Os 8b).
|Number of pages||6|
|Journal||Journal of the Chemical Society - Dalton Transactions|
|Publication status||Published - 21 Jul 1997|
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