Fig. 14From: Specific energy contributions from competing hydrogen-bonded structures in six polymorphs of phenobarbitalCrystal packing of polymorph VI. Interactions of selected A and B molecules (drawn in ball-and-sticks-style) within the same C-5 chain (blue) and with molecules belonging to three neighbouring chains (@1–@3; see Fig. 13). Together, C-5 hydrogen bonding and @1 chain stacking account for 84 % of E T,Cry Back to article page