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Reactions of aryl isocyanide with bis(guanidinate) Zr(IV) hydrocarbyl complexes are presented. With 1 equiv of Ar‘NC the ultimate products are the terminal Zr imido complexes [{(R‘NR‘ ‘)C(NR) 2 } 2 ZrN(2,6-Me 2 C 6 H 3 )] ( 3, R = R‘ = i Pr, R‘ ‘ = H; 5, R = i Pr, R‘ = R‘ ‘ = Me), which are derived via a unique transformation from intermediate η 2 -iminoacyl species. With 2 equiv of Ar‘NC, [{(Me 2 N)C(N i Pr) 2 } 2 Zr(η 2 -Ar‘N CMe) 2 ] ( 6 ) was isolated. Mild thermolysis of 6 generates an enediamido complex via intramolecular coupling of the iminoacyl groups.
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Ong et al. (2001) studied this question.
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