DISTORTION OF CRYSTAL-STRUCTURES OF SOME CO-III AMMINE COMPLEXES .1. DISTORTION OF CRYSTAL-STRUCTURE OF [CO(NH3)(5)NO2]CL(NO3) ON COOLING

The anisotropy of the structural distortion of [Co-(NH3)(5)NO2]Cl(NO3) , pentaamminenitrocobalt(III) chloride nitrate, on cooling from 290 to 150 K was studied by variable-temperature single-crystal X-ray diffra ction. The changes in lattice parameters were used to calculate the st rain tensors and to scan linear distortion in various crystallographic directions. The changes of different intra- and intermolecular distan ces in the structure were followed. Lattice strain induced by low temp erature was compared with lattice strain in the same structure under h igh hydrostatic pressure and with lattice strain induced by homogeneou s nitro-nitrito linkage isomerization.