Synthesis of an imidazolium phosphanide zwitterion and its conversion into anionic imidazol-2-ylidene derivatives.
Matter of opinion: The novel zwitterion 1 has been synthesized and studied theoretically and also converted into anionic NHCs 2. The former can also be described as a phosphinidene adduct of an abnormal N-heterocyclic carbene (1') and, in the same vein, the latter represents a phosphinidene adduct of an anionic N-heterocyclic dicarbene (2').
['Majhi|Paresh K|PK|', 'Schnakenburg|Gregor|G|', 'Kelemen|Zsolt|Z|', 'Nyulaszi|Laszlo|L|', 'Gates|Derek P|DP|', 'Streubel|Rainer|R|']
phosphanides zwitterions anionic imidazol-2-ylidenes N-heterocyclic carbenes abnormal NHCs