• 1-Phenyl-3-(quinolin-5-yl)urea as a host for distinction of phthalic acid and terephthalic ac

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    • Keywords

       

      1-Phenyl-3-(quinolin-5-yl)urea; hydrogen bond; co-crystal; salt; visual distinction.

    • Abstract

       

      Co-crystals of 1-phenyl-3-(quinolin-5-yl)urea (1) with terephthalic acid, adipic acid; and salts of 1 with phthalic acid, 𝑝-toluenesulphonic acids are prepared and structurally characterized. The reaction of phthalic acid and 𝑝-toluenesulphonic acid resulted in protonation of the host 1, whereas the terephthalic acid and adipic acid interact with 1, led to cocrystals with the host 1 through hydrogen bond interactions. The hydrogen bonds that appears in the urea taps of the host molecules 1 are lost while formation of salts; in such cases anions interacts with the urea portion of the host, while in the co-crystals the hydrogen bonded urea taps are retained. The salts are yellow in colour while the co-crystals are colourless; thereby the positional isomer phthalic acid can be distinguished from the terephthalic acid.

    • Author Affiliations

       

      Dipjyoti Kalita1 Jubaraj B Baruah1

      1. Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati 781 039, India
    • Dates

       
  • Journal of Chemical Sciences | News

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      Posted on July 25, 2019

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