Abstract
Crystals of the title compound are monoclinic, a= 13·017, b= 17·439, c= 23·879 A, β= 93·89°, Z= 2, space group P21/c. The structure was determined from diffractometer data by a combination of direct and Patterson methods, and refined by full-matrix least-squares procedures to R 0·093 for 2695 observed reflexions. The cation is similar to that in a related copper complex, cobalt being bonded to four nitrogen atoms of the phosphazene ring and to one chlorine atom in a configuration between a square pyramid and trigonal bipyramid. The anionic cobalt is present as the hitherto unrecognized centrosymmetrical Co2Cl62– ion, in which two chlorine bridges complete tetrahedral co-ordination about the cobalt atoms.
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