Distorted dodecahedral co-ordination in the crystal structure of isoquinolinium tetrakis[4,4,4-trifluoro-1-(2-thienyl)butane-1,3-dionato]cerium(III)

Abstract

The crystal structure of isoquinolinium tetrakis[4,4,4-trifluoro-1-(2-thienyl)butane-1,3-dionato]cerium(III) has been established by three-dimensional X-ray analysis and the molecular parameters refined by full-matrix least-squares calculations to R 0·128 over 5325 observed reflections from photographic data. The crystals are monoclinic, space group P2₁/c, a= 22·76(4), b= 10·85(2), c= 20·13(4)Å, β= 112·58(10)°, Z= 4. Eight oxygen atoms surround the cerium atom, mean Ce—O = 2·470 Å, in a dodecahedral arrangement distorted by an N–H ⋯ O hydrogen bond from the isoquinolinium ion.