Charge-Transfer Adducts of Chalcogenourea Derivatives of N-Heterocyclic Carbenes with Iodine Monochloride

In this communication, we investigate the reaction between seleno- and thiourea, derived from N-heterocyclic carbenes, with interhalogen iodine monochloride. The formation of all three products was confirmed by NMR spectroscopy, while single-crystal X-ray analyses were able to establish a charge-transfer coordination type, which showed linear Se/S-I-Cl arrangement, for adducts formed. Based on detailed crystallographic analysis, can deduce zwitterionic character these compounds.