Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
The Crystal and Molecular Structure of Dimethyl m-Phenylenediacrylate
Hachiro NakanishiYoshio Sasada
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1977 Volume 50 Issue 12 Pages 3182-3185


Photooligomerizable crystals of dimethyl m-phenylenediacrylate are orthorhombic, Pmn21, with a=26.419(8), b=3.960(1), c=5.935(2) Å, and Z=2. The structure was solved by the direct method and refined by the block-diagonal least-squares calculation to the R value of 0.042 for 617 observed reflections. The molecule is nearly planar and V-shaped with a mirror symmetry. A parallel plane-to-plane stack is found along the short b-axis. The molecules in the stack overlap completely, in contrast with the half-molecule overlap in the photopolymerizable crystals of this kind. The length of the b-axis is just the shortest intermolecular distance between reactive double bonds, indicating that the double bonds related by the b-translation would react to form a cyclobutane ring with a mirror symmetry.

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