title: A Mn(III)-superoxo complex of a zwitterionic calix[4]arene with an unprecedented linear end-on Mn(III)-O2 arrangement and good catalytic performance for alkene epoxidation.
abstract: Reactions of [H(4)L][PF(6)](4) with 4 equiv. of Mn(OAc)(2)·4H(2)O in the presence of air gave rise to a mononuclear Mn(III)-superoxo complex [Mn(III)L(O(2))(H(2)O)](PF(6))(2), which contains a bowl-shaped cationic structure with a D(4d) symmetry. It has an unprecedented linear end-on Mn(III)-O(2) unit and exhibited good efficiency and selectivity in the catalytic oxidation of alkenes with O(2) plus isobutyraldehyde under mild conditions.
authors: College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, Jiangsu, PR China.
authors: Lei-Lei
authors: LL
authors: Liu
authors: Hong-Xi
authors: HX
authors: Li
authors: Li-Min
authors: LM
authors: Wan
authors: Zhi-Gang
authors: ZG
authors: Ren
authors: Hui-Fang
authors: HF
authors: Wang
authors: Jian-Ping
authors: JP
authors: Lang
mesh_terms: D000475:Alkenes / Q000737:chemistry*; D047250:Calixarenes / Q000737:chemistry*; D002384:Catalysis; D004579:Electron Transport; D004852:Epoxy Compounds / Q000737:chemistry*; D008345:Manganese / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry*
chemical_list: D000475:Alkenes; D004852:Epoxy Compounds; D009942:Organometallic Compounds; D010636:Phenols; C121325:calix(4)arene; D047250:Calixarenes; D008345:Manganese; D010100:Oxygen