Novel group 14 elements-bridged self-assembled supramolecules from pyrimidine derivatives and palladium ions

A solvent-free complex of dimethyldi(5-pyrimidyl)silane with (ethylenediamine)palladium dinitrate in ratio of 1:3 afforded hitherto unknown three-dimensional, silicon-bridged, self-assembled, cage-like supramolecule via dative: bonding to the transition metal centers. The structure of the supramolecule was fully identified by spectroscopic methods and X-ray diffraction analysis. A germanium analogue was also prepared in the same way.