Figure 2
(a) Hydrogen-bonding interactions between copies of 3 along the a and b axes. (b) C—O and H—O distances suggestive of a potential C—H⋯O hydrogen bond along the a axis. N—H⋯O distances for the H1B⋯O3 hydrogen bond are included for comparison. (c) Measured distances and electrostatic coloring between H4A, C7, and C8 used to explore a potential C—H⋯π interaction within the ab plane molecular layers. Partial charges were generated within UCSF Chimera (Pettersen et al., 2004) using the Amber ff14SB forcefield in Antechamber (Wang et al., 2006) with the semi-empirical AM1 − BCC method and color coded with pink for negative charges and light blue for positive charges. |