Premium
Molybdenum(VI) Bisimidoaryl Phenoxide and Alkoxide Complexes: Molecular Structures of [Mo(NAr) 2 (OCMe 2 ‐2‐py)(CH 2 SiMe 3 )] and [{Mo(NAr) 2 Me(OMe)} 2 ]
Author(s) -
M. Brandts Jim A.,
Boersma Jaap,
Spek Anthony L.,
van Koten Gerard
Publication year - 1999
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/(sici)1099-0682(199910)1999:10<1727::aid-ejic1727>3.0.co;2-u
Subject(s) - chemistry , molybdenum , alkoxide , methoxide , ligand (biochemistry) , transmetalation , medicinal chemistry , stereochemistry , chelation , chloride , crystal structure , solid state , methanol , alcohol , crystallography , inorganic chemistry , catalysis , organic chemistry , biochemistry , receptor
The synthesis and characterisation is reported of new, five‐coordinate molybdenum(VI) bisimidoaryl complexes [Mo(NAr) 2 ( O‐N )(R)] [Ar = C 6 H 3 ( i Pr) 2 ‐2,6; O‐N = 2‐pyridyldiphenylmethoxide ( a ), 2‐pyridyldimethylmethoxide ( b ), 8‐quinolinolate ( c ); R = Cl, Me, CH 2 SiMe 3 ] and the corresponding bisalkoxide ( a , b ) and bisphenolate [ c , d = (OC 6 H 4 CH 2 NMe 2 ‐2) − ] Mo VI bisimidoaryl complexes [Mo(NAr) 2 ( O‐N ) 2 ]. These complexes can be formed by simple alcoholysis reactions between [Mo(NAr) 2 Cl 2 (DME)] and the appropriate alcohol in the presence of Et 3 N. The remaining chloride can be replaced by a methyl or trimethylsilylmethyl group by transmetallation with MeMgCl or LiCH 2 SiMe 3 . The solid state structure of [Mo(NAr) 2 (OCMe 2 ‐2‐py)(CH 2 SiMe 3 )] ( 5 ) has been determined by single‐crystal X‐ray analysis. A similar synthetic procedure was used to synthesise and characterise [{Mo(NAr) 2 Me(OMe)} 2 ] ( 7 ). The two methoxide ligands bridge between the two molybdenum(VI) nuclei. Compounds in which the ligand can form six‐membered chelate rings {like [Mo(NAr) 2 (OC 6 H 4 CH 2 NMe 2 ‐2) 2 ] ( 9 ) and analogues} are usually difficult to obtain in a pure form and yields are typically low.