Synthesis, spectroscopic characterization and X-ray crystal structures of oxo-bridged oxo(haloaryl) imido hydrotris(3,5-dimethylpyrazolyl)borate molybdenum(V) complexes

Author： Topaloglu-Sozuer Isil Dulger Irdem Seckiner Jeffery John J. Hamidov Hayrullah

Publisher： Taylor & Francis Ltd

ISSN： 0095-8972

Source： Journal of Coordination Chemistry, Vol.58, Iss.2, 2005-01, pp. : 175-187

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Abstract

Reaction of the oxomolybdenum(V) precursor [MoTp*(O)Cl 2 ] (Tp* = hydrotris(3,5-dimethyl-1-pyrazolyl)borate) with m -fluoroaniline, H 2 NC 6 H 4 F, in toluene afforded the pair of geometric isomers of [MoTp*(O)Cl](µ-O)[MoTp*(Cl)(⊥NC 6 H 4 F)] ( 1a , cis ; 1b , trans ). Similarly the reaction with m -iodoaniline yielded the compound [MoTp*(O)Cl](µ-O)[MoTp*(Cl)(⊥NC 6 H 4 I)] ( 2 ). This is a new synthetic method for preparing Mo-O-Mo bridged oxo(imido) molybdenum(V) species by double deprotonation of the anilines. The complexes were characterized by IR and 1 H-NMR. spectroscopy, FAB mass spectrometry, elemental analysis and X-ray crystallography which revealed that the two chloro ligands are trans to each other in 1b and 2 , whereas they are cis to each other in 1a . All compounds have Mo-O-Mo linkages and near linear arylimido moieties.