Crystaland Molecular Structures of Isomorphous Bis1,3-di(p-n-.octylphenyl)propane-1 ,3-dionatoPaliadium(lI)and Bis1,3-di(p-noctylphenyl) propane-1,3-dionatoNickel(ll)

摘要

Crystal structures of the transition metal complexes bis(I,3-di(p-n-octylphenyl)propane-l,3-dionato]palladium(II) and bis(I,3-di(p-n-octylphenyl)propane-l,3-dionato] nickel(II) have been solved and refined to R = 0.051 and 0.064 respectively, using diffractometer collected X-ray data. The palladium and the nickel complexes are found to be isomorphous with the P-form of the copper complex bis[1,3-13; di(p-n-octylphenyl propane-l ,3-dionato] copper(II). Despite the unambiguous structural isomorphism, only the palladium and the copper complexes are mesogenic; the nickel complex is reportedly nonmesogenic.In the crystal structures, the metal atoms are surrounded by four oxygen atoms in a square planar arrangement. The octyl chains are fully extended in an all-trans conformation. The crystal13; structures are characterized by both layer-like and columnar arrangement of molecules.