Crystal and molecular structure of bistriphenyl(ethyl)phosphonium pentanitratocerium(III)

摘要: Crystals of the title compound are monoclinic space group C2/c with a= 19·83(3), b= 11·05(2), c= 21·76(3)A, β= 108·17°, and Z= 4. The anion has crystallographic C2 symmetry cerium atom is ten-co-ordinate, being chelated symmetrically by five bidentate nitrate ligands. mean Ce–O distance 2·57(2)A. co-ordination geometry not very readily described in terms any idealised high polyhedron, but if each ligand considered, as occupying one site, then arrangement closely approximates to a trigonal bipyramid. structure was solved from X-ray photographic data Patterson Fourier methods refined least-squares techniques R 9·8% for 1516 observed reflections.