Paramagnetic organometallics: preparation, structural, and redox chemistry of tantalum(II)η6-arene complexes
Abstract
The reduction of (η6-C6R6)Ta(OR′)2Cl [(1) R = Et; (2) R = Me; OR′= 2,6-diisopropylphenoxide] with excess Na/Hg provides the first well characterised TaII organometallics, viz. the monomeric compounds (η6-C6R6)Ta(OR′)2[(3) R = Et; (4) R = Me]; the X-ray structure of (η6-C6Et6)Ta (O-2,6-Pri2C6H3)2(3), reveals some unusual distortions in the co-ordinated arene ligand.