Single-crystal-to-single-crystal photodimerization of 4-chlorocinnamoyl-O, O-dimethyldopamine

Shigeru Ohba, Yoshikatsu Ito

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

[2+2]Photodimerization of the title compound, C19H 20ClNO3, has been observed in situ by single-crystal X-ray diffraction. Pairs of monomers related by centers of symmetry have parallel C=C bonds at a C...C distance of 4.155 (17) Å. Irradiation of a single crystal with a mercury lamp achieves 100% conversion to the dimer. Redetermination of the structure during the course of the reaction revealed a linear correlation between the percent conversion to the dimer and the decrease in the cell volume. The displacement parameters for the pure dimer structure are substantially smaller than those for the pure monomer structure. The dimerization reaction is also induced by irradiation with X-rays, the induction being stronger with Cu Kα than with Mo Kα radiation.

Original languageEnglish
Pages (from-to)149-155
Number of pages7
JournalActa Crystallographica Section B: Structural Science
Volume59
Issue number1
DOIs
Publication statusPublished - 2003 Feb

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Dimerization
Mercury
Cell Size
X-Ray Diffraction
Dimers
dimers
X-Rays
Single crystals
Radiation
single crystals
monomers
Monomers
Irradiation
Mercury vapor lamps
mercury lamps
irradiation
dimerization
induction
x rays
X ray diffraction

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Structural Biology

Cite this

Single-crystal-to-single-crystal photodimerization of 4-chlorocinnamoyl-O, O-dimethyldopamine. / Ohba, Shigeru; Ito, Yoshikatsu.

In: Acta Crystallographica Section B: Structural Science, Vol. 59, No. 1, 02.2003, p. 149-155.

Research output: Contribution to journalArticle

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