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Figure 5
Molecular electrostatic potential (MESP) maps of the four crystal structures drawn on Hirshfeld isosurface at ± 0.03 contour level. Red represents negative and blue represents positive electrostatic potentials (both front and back view). The arrows between the front and back of a given molecule in TCNQ and F4-TCNQ show that the electrostatic potential distribution of the two faces are similar but are oriented in the opposite direction. The cross between the front and back of F2′-TCNQ shows that the electrostatic potential distribution in the front and back of the molecule is not similar with respect to each other. The dotted lines shown in the front view of F2-TCNQ represent the existence of a mirror plane due to which the electrostatic potential distribution on the front and back of F2-TCNQ is same.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 75| Part 1| February 2019| Pages 71-78
https://doi.org/10.1107/S2052520618017109
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