Figure 1

Chemical structure and molecular orientation in the crystalline state.
(a) Chemical structure of HMQ-TMS. (b) Crystal packing diagram of HMQ-TMS crystals projected along the b-axis. The molecular-ordering angle of βmax with respect to the main charge transfer axis Z (polar axis) of the crystal is very small (θp = 1.1°), which results in a practically perfect order parameter cos3θp = 1.0.