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The anisotropy of the structural distortion of Co(NH 3 ) 5 NO 2 Cl(NO 3 ), pentaamminenitrocobalt(III) chloride nitrate, on cooling from 290 to 150 K was studied by variable-temperature single-crystal X-ray diffraction. The changes in lattice parameters were used to calculate the strain tensors and to scan linear distortion in various crystallographic directions. The changes of different intra- and intermolecular distances in the structure were followed. Lattice strain induced by low temperature was compared with lattice strain in the same structure under high hydrostatic pressure and with lattice strain induced by homogeneous nitro–nitrito linkage isomerization.
Boldyreva et al. (Sun,) studied this question.