An N-Heterocyclic carbene with a sulfonamide group embedded within the heterocyclic backbone

The N-heterocyclic carbene 1 with a sulfonamide group attached to the carbene C atom was prepared in a three-step-sequence. 1 is a poor overall donor as evidenced by its TEP value of 2063 cm−1 and structural parameters determined by X-ray diffraction studies of Rh complexes including 3.97