171Yb cross-polarization magic angle spinning NMR spectroscopic studies of organometallic compounds:? bis(cyclopentadienyl) derivatives

A series of nine Yb(II) bis(cyclopentadienyl) complexes have been studied by 171Yb CP MAS (cross polarization magic angle spinning) NMR spectroscopy. The optimization of the cross polarization conditions are described. The proton T1? values have been determined. The spinning side band manifold for each compound has been analyzed. The derived chemical shift tensor data are discussed with respect to molecular structure elucidation.