Structural Chemistry

, Volume 5, Issue 4, pp 283–289 | Cite as

Molecular structures and packing arrangements of five 2,5-bis(aryl-2-vinyl)-1,4-dimethoxybenzene derivatives

  • Hermann Irngartinger
  • Jochen Lichtenthäler
  • Rüdiger Herpich
Article
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Abstract

The crystal and molecular structures of five 2,5-bis(aryl-2-vinyl)-1,4-dimethoxybenzene derivatives1a-1e were determined by X-ray diffraction with respect to topochemical aspects. We found three types of packing arrangements: (1)α-type packing with 7 Å stacking axes, (2)β-type packing with 4 Å stacking axes and (3) a third intermediate packing type. The intermolecular distances between the vinylic double bonds of all derivatives exceed the limits of 4 Å in the crystals. Therefore photochemical [2+2]cycloadditions were not observed in the crystals of these compounds. A correlation between the inclination angle of the molecular plane to the stacking axis and the separation between potentially reactive double bonds was detected.

Key words

Distyryl-1,4-dimethoxybenzene derivatives molecular structures packing arrangements photochemical behavior 
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Copyright information

© Plenum Publishing Corporation 1994

Authors and Affiliations

  • Hermann Irngartinger
    • 1
  • Jochen Lichtenthäler
    • 1
  • Rüdiger Herpich
    • 1
  1. 1.Organisch-Chemisches Institut der Universität HeidelbergHeidelbergGermany

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