Australian Journal of Chemistry p. 1339 - 1343 (1996)
Update date:2022-07-30
Topics:
Hamilton, Darren G.
Lynch, Daniel E.
Smith, Graham
The synthesis of an unsymmetrical squaraine dye, 2-[4-(dibutylamino)-2-hydroxyphenyl]-4-[4-(dibutylamino)phenyl] cyclobutenebis(ylium)-1,3-diolate, has been achieved via a cross condensation reaction. In the solid state the compound is isomorphous with the known symmetrical dye bis[4-(dibutylamino)phenyl]squaraine. The single hydroxy group is found to be disordered equally over the centrosymmetrically trans-related ortho and ortho' phenyl ring sites.
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