Synthesis and structure of the mixed anion sandwich complex {[(C5H5)9Pb4]–[(C5H5)5Pb2]–[Li(12-crown-4)2]+2}
Abstract
The title compound, {[(C5H5)9Pb4]–[(C5H5)5Pb2]–[Li(12-crown-4)2]+2}1, is synthesised by the reaction of [(C5H5)2Pb] and [(C5H5)Li] and 12-crown-4 (3:1:2 equiv. ), and is shown by X-ray diffraction to contain both a quintuple-decker and a triple-decker sandwich anión; in contrast, the corresponding reaction with [(C5H5)2Sn](which possesses no such polymeric lattice of its own) in place of [(C5H5)2Pb]∞ yields the simple ‘paddlewheel’ molecule {[(C5H5)3Sn]–[Li(12-crown-4)2]+}2.