691870-65-2Relevant articles and documents
Investigations of reactions between chiral molybdenum imido alkylidene complexes and ethylene: Observation of unsolvated base-free methylene complexes, metalacyclobutane and metalacyclopentane complexes, and molybdenum(IV) olefin complexes
Tsang, W.C. Peter,Jamieson, Jennifer Y.,Aeilts, Sarah L.,Hultzsch, Kai C.,Schrock, Richard R.,Hoveyda, Amir H.
, p. 1997 - 2007 (2004)
In this paper we explore reactions between 13CH 2=13CH2 and the imido alkylidene complexes, Mo(NAr)(CHCMe2Ph)[(S)-Biphen] (3a; NAr = N-2, 6-i-Pr 2C6H3), Mo(NArcl)-(CHCMe 3)[(S)-Biphen] (3b; NArcl = N-2,6-Cl2C 6H3), Mo(NAd)(CHCMe2Ph)[(S)-Biphen] (3c; NAd = N-1-adamantyl), Mo(NAr)(CHCMe2Ph)[(R)-Benz2Bitet] (3d), and Mo(NArcl)(CHCMe2-Ph)[(R)-Benz2Bitet] (3e). (See text for a description of Biphen and Benz2Bitet.) Under a variety of conditions and for various combinations of imido, alkylidene, and diolate ligands, we have observed α-substituted molybdacyclobutanes Mo(NR)(*CH2*CH2CHCMe2Ph)[diolate] (*C = 13C), unsubstituted molybdacyclobutanes Mo(NR)(*CH2*CH2*CH2)[diolate] , olefin complexes Mo(NR)(*CH2=CHR) [diolate] (R = H or CMe2Ph), molybdacyclopentane complexes Mo(NR)-(*CH 2*CH2*CH2*CH2) [diolate], and base-free methylene complexes Mo(NR)(*CH 2)[diolate]. We also have crystallographically characterized a molybdenum ethylene complex derived from a biphenolate complex, Mo(N-2,6-Cl 2C6H3)(CH2=CH2)[rac- Biphen](Et2O).
