Article

Journal of Structural Chemistry

, Volume 46, Issue 1, pp 154-158

First online:

Molecular and crystal structure of 3-butoxy-4-(1,3,3-trimethyl-2,3-dihydro-1H-2-indolylidenemethyl)-3-cyclobutene-1,2-dione and its thio analog

  • S. V. ShishkinaAffiliated withInstitute of Scintillation Materials, National Academy of Sciences of Ukraine
  • , V. N. BaumerAffiliated withInstitute of Scintillation Materials, National Academy of Sciences of Ukraine
  • , O. V. ShishkinAffiliated withInstitute of Scintillation Materials, National Academy of Sciences of Ukraine
  • , A. L. TataretsAffiliated withInstitute of Single Crystals, National Academy of Sciences of Ukraine
  • , L. D. PatsenkerAffiliated withInstitute of Single Crystals, National Academy of Sciences of Ukraine

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Abstract

X-ray investigation of 3-butoxy-4-(1,3,3-trimethyl-2,3-dihydro-1H-2-indolylidenemethyl)-3-cyclobutene-1,2-dione and its thio analog has been carried out. Replacement of the carbonyl oxygen atom by a sulfur atom causes electron density delocalization and equalization of the C-C bonds between the four-and five-membered rings.

Keywords

squaraines conformation X-ray analysis