Asymmetric rotations and dimerization driven by normal to modulated phase transition in 4-biphenylcarboxy coupled l-phenylalaninate

Dey, S.; Sasmal, S.; Mondal, S.; Kumar, S.; Chowdhury, R.; Sarkar, D.; Malla Reddy, C.; Peters, L.; Roth, G.; Haldar, D.

doi:10.1107/S2052520623000215

Acta Crystallographica Section B
Acta Crystallographica
Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS

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Figure 4
Comparison of structures in phase I and phase II across the phase transition highlighting the effect of internal torsion (φ³) within biphenyl on the stacking arrangements along a. The tilt between the biphenyl stacks, θ_AA/BB are different for the inner rings (bonded to amide rings) and the outer rings. Corresponding values of φ³ and θ are in Fig. 3