Topochemical dimerization of non-parallel double bonds: 7-methoxycoumarin

M. M. Bhadbhade, G. S. Murthy, K. Venkatesan, V. Ramamurthy

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


X-ray crystal structure analysis of 7-methoxycoumarin reveals that the reactive double bonds are rotated by about 65° with respect to each other, the centre-to-centre distance between the double bonds being 3.83 Å. In spite of this unfavourable arrangement, photodimerization occurs in the crystalline state yielding the syn-head-tail dimer as the only product. Lattice energy calculations on ground-state molecules in crystals throw light on the mechanism of the reaction.

Original languageEnglish (US)
Pages (from-to)259-263
Number of pages5
JournalChemical Physics Letters
Issue number3
StatePublished - Aug 17 1984
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry


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