TRANSITION-METALS COMPLEXED TO ORDERED MESOPHASES .1. SYNTHESIS CHARACTERIZATION AND MESOMORPHIC PROPERTIES OF BINUCLEAR CYCLOPALLADATED PHENYLPYRIMIDINE SPECIES - CRYSTAL-STRUCTURE OF BIS((5-(1-HEXYL)-2-[(4'-METHOXY)PHENYL-2'-ATO]PYRIMIDINE-N',C2')-MU-ACET ATO)DIPALLADUM(II)