Optically Active Transition Metal Complexes. 129.<sup>1</sup> Novel Cycloheptatrienyl−Molybdenum and Cyclopentadienyl−Ruthenium Complexes with Chiral Pyridinecarbaldiminato Chelate Ligands: Syntheses, Molecular Structures, Properties, and Stereochemistry at the Metal Atom
作者:Henri Brunner、Jürgen Klankermayer、Manfred Zabel
DOI:10.1021/om020523a
日期:2002.12.1
crystallization. X-ray structure analyses established the conspicuously similar molecular structures of the isoelectronic molybdenum and ruthenium complexes and the absolute configurations of 2a, 7b, 8b, 9b, 10a, 12a, and 13b. In the diastereomers (RMo,SC)- and (SMo,SC)-[(η7-C7H7)Mo(LL1)(CO)]BF4 (2a,b), the molybdenum configuration was configurationally labile at room temperature. The epimerization 2a ⇆ 2b
的反应[(η 7 -C 7 ħ 7)的Mo(η 6 -C 6 H ^ 5 CH 3)] BF 4与光学活性的席夫碱配体LL 1 -LL 3(LL 1 =吡啶-2- carbald- (小号)-1- phenylethylimine,LL 2 = 6-甲基吡啶-2- carbald-(小号)-1- phenylethylimine,LL 3 =吡啶-2- carbald-(小号)-1- cyclohexylethylimine)的乙腈,得到非对映体(R Mo,S C)-和(S Mo,小号Ç) - [(η 7 -C 7 ħ 7)的Mo(LL 1 - 3)(NCMe)] BF 4(1A,b,图3a,b,和图5a,b)。与一氧化碳反应导致非对映体的混合物([R沫,小号Ç) -和(小号沫,小号Ç) - [(η 7 -C 7 ħ 7)的Mo(LL 1 - 3)(CO)] BF 4(2a,b,4a,b和6a,b)。配体LL