Dimeric µ-dimethyl lanthanide complexes, a new class of electron-deficient compound, and the crystal and molecular structure of [Yb(η-C5H5)2Me]2
Abstract
The crystalline [M(η-C5H5)2Me]2(M = Y, Dy, Ho, Er, or Yb) were obtained by equimolar reaction of [M(η-C5H5)2Me2AlMe2] and pyridine in toluene; the symmetrical MMe2M double-methyl-bridge is established for the Y compound in solution from 1H n.m.r. spectra, and for the solid Yb analogue from a single crystal X-ray analysis.