• In chemistry, mesoionic carbenes (MICs) are a type of reactive intermediate that are related to N-heterocyclic carbenes (NHCs); thus, MICs are also referred...
    16 KB (2,062 words) - 07:46, 10 October 2022
  • Thumbnail for Persistent carbene
    85.7°). Mesoionic carbenes (MICs) are similar to N-heterocyclic carbenes (NHCs) except that canonical resonance structures with the carbene depicted...
    62 KB (6,933 words) - 01:47, 27 April 2024
  • and sydnone imines (e.g. the stimulant mesocarb), münchnones, and mesoionic carbenes. The formal positive charge is associated with the ring atoms and...
    4 KB (377 words) - 22:28, 10 December 2023
  • Thumbnail for Martin Albrecht (chemist)
    known for his contribution to carbene chemistry, particularly with his work on 1,2,3-triazolylidene mesoionic carbene. Martin Albrecht completed his...
    12 KB (1,137 words) - 05:07, 6 May 2024
  • Thumbnail for Robert H. Crabtree
    field of carbene chemistry, particularly in the exploration of mesoionic carbenes (MICs), or so called "abnormal carbenes". These carbenes, offer advantages...
    17 KB (1,677 words) - 11:59, 12 May 2024
  • Triazol-5-ylidene (category Carbenes)
    3-triazol-5-ylidene is better thought of as a mesoionic carbene (MIC). Both isomers of this group of carbenes benefit from enhanced stability, with certain...
    22 KB (2,758 words) - 23:40, 9 December 2023
  • stability of carbenes. He was the first to isolate cyclopropenylidenes, mesoionic carbenes that cannot dimerize, resulting in a relaxation of steric requirements...
    20 KB (1,554 words) - 09:39, 7 April 2024
  • Thumbnail for Sydnone
    Sydnones are mesoionic heterocyclic chemical compounds possessing a 1,2,3-oxadiazole core with a keto group in the 5 position. Like other mesoionic compounds...
    7 KB (669 words) - 16:25, 20 April 2024
  • Thumbnail for PEPPSI
    deactivation of PEPPSI catalysts. Examples of abnormal NHCs based on the mesoionic 1,2,3-triazol-5-ylidene structure have been used for palladium catalysis...
    14 KB (1,406 words) - 10:53, 26 April 2023
  • Sonogashira couplings. Interesting examples of abnormal NHCs are based on the mesoionic 1,2,3-triazol-5-ylidene structure. An efficient, cationic palladium catalyst...
    48 KB (5,436 words) - 17:20, 21 March 2024