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Figure 1
Perspective views of malonic acid molecules, hydrogen-bonded across inversion centers and in the same mutual orientation as observed in the crystal structures, with atomic notation as used in the text. Intermolecular hydrogen bonds are sketched as dashed (O—D—O) and dotted (C—D⋯O) lines. Bent arrows indicate a sense of torsional motion around the C0—C2 bond. The ellipsoidal surfaces enclose 99.9% probability (Johnson, 1976BB36). (a) γ phase at 50 K; (b) β phase at 153 K.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
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