Fig. 7From: Specific energy contributions from competing hydrogen-bonded structures in six polymorphs of phenobarbitalPacking diagram of polymorph III, showing interactions of a selected Pbtl molecule (drawn in ball-and-sticks-style) within the same C-2 chain (blue) and with molecules belonging to four neighbouring chains (@1–@4; see Fig. 6). Together, these interactions account for 91 % of E T,Cry Back to article page