Figure 1
The elongation of bonds upon cooling from 296 K [(II), A] to 100 K [(I), B] is associated with a decrease in libration (C). All displacement ellipsoids are drawn at the 50% probability. [Symmetry codes: (a) −y + , x + , −z + ; (b) −x + 1, −y + , z; (c) y + , −x + ., z + .] |