Synthesis and structure of [Cp2PbCpthf Na]center dot 0.5thf; implications to the control of dimensionality in p block metallocene anion systems (C = C5H5, Cp-thf = {C5H4}CH2C4H7O)

The title compound [(Cp2PbCpNa)-Na-thf]. 0.5thf 1, obtained from the additi on reaction of Cp2Pb with [(CpNa)-Na-thf . thf], provides the first opportu nity to assess the structural impact of internal donation on aggregation wi thin a p block metal cyclopentadienide anion system; the result being the a doption of an unusual polymeric sheet structure composed of [(Cp2PbCpNa)-Na -thf](3) rings.