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The reaction of 2,3-dihydro-1,3-diisopropyl-4,5-dimethylimidazol-2-ylidene (7, Im) and alkyl iodides has been investigated. With MeI, 7 forms a 1/1 mixture of [ImH]I (10) and [ImEt]I (11a) while from the reaction of 7 with EtI an 1/1/1 mixture of 10, 11a and [ImCH(Me)Et]I (11b) is obtained. The mechanism of the reactions is discussed, and the crystal structures of 10 and 11a are reported.

zeitschrift für naturforschung b

Zur Alkylierung von 2,3-Dihydro-1,3-diisopropyl-4,5- dimethylimidazol-2-yliden [1] / On the Alkylation of 2,3-Dihydro-1,3-diisopropyl-4,5-dimethylimidazol-2-ylidene [1]