Fig. 9From: Specific energy contributions from competing hydrogen-bonded structures in six polymorphs of phenobarbitalPacking diagram of polymorph I. One selected molecule of each type of A, B and C is drawn in ball-and-sticks-style. Together the internal L-3 (blue) and C-3 (orange) interactions account for 67 % of E T,Σ. Interactions between L-3 and C-3 chains (@1) account for 19 % and interactions between neighbouring C-3 chains (@2, @3) for 9 % of E T,Σ Back to article page