Abstract
Dimethyl- and pentamethylene-diazirine react with [M(CO) 5(THF)] (M Cr, Mo, W) by formation of yellow (η 1-diazirine)M(CO) 5 (I), red (η 2-diazirine)M 2-(CO) 10 (II) and some deeply colored minor products. (Norbornadiene)M(CO) 4 yields the green metallacycles (CO) 4M(η 2-diazirine) 2M(CO) 4 (III). Complexes II and III possess two well separated electronic absorption bands in the range of 18 to 29 kK. In contrast to the reactions with iron and ruthenium carbonyls, essentially no cleavage of the NN bond is observed with Group VIb metal carbonyls.
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