Pressure as a tool in crystal engineering: inducing a phase transition in a high-Zprime or minute structure
CrystEngComm, 12 (9):
2520--2523 (2010)DOI: 10.1039/b917290d
Abstract
Methyl 2-(carbazol-9-yl)benzoate is unusual in crystallising with eight molecules in the crystallographic asymmetric unit (Zprime or minute = 8). Under high pressure it transforms to a Zprime or minute = 2 structure. The molecules in the Zprime or minute = 2 phase have unfavourable conformations, but these are stabilised in the crystal by their efficient packing at high pressure.