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Synthesis and Spectral Studies of Bisthiocarbohydrazone and Biscarbohydrazone of Quinoline-2-carbaldehyde: Crystal Structure of Bis(quinoline-2-aldehyde) Thiocarbohydrazone

Journal of Chemical Crystallography volume 38, pages 157–161 (2008)Cite this article

Abstract

Two new ligands, having flexible coordination ability, 1,5-bis(quinoline-2-carbaldehyde) thiocarbohydrazone and 1,5-bis(quinoline-2-carbaldehyde) carbohydrazone were synthesized and characterized by elemental analysis, IR, and UV spectral studies. The compounds exist in the thione/ketone tautomeric forms, as evidenced by IR spectral data. The structure of bis(quinoline-2-aldehyde) thiocarbohydrazone has been solved by single crystal XRD study. The compound C21H16N6S crystallizes in triclinic form with two independent molecules in the asymmetric unit, space group \( {\text{P}}\overline 1\), Z = 4, V = 1856.1(6) Å3 with unit cell parameters a = 11.331(2) Å, b = 11.714(2) Å, c = 15.116(3) Å, α = 100.369(4)°, β = 109.512(4)° and γ = 90.134(4)°. Both molecules exist in the thione forms and show a Z–Z configuration about both azomethine bonds, with quinoline nitrogens on opposite sides. The N–N, N–C and the C–S bond distances of the thiocarbohydrazide moiety suggest extensive electron delocalization of the whole thiocarbohydrazone moiety.

Index Abstract

Synthesis and spectral studies of bisthiocarbohydrazone and biscarbohydrazone of quinoline-2-carbaldehyde: Crystal structure of bis(quinoline-2-aldehyde) thiocarbohydrazone, E. Manoj, M. R. Prathapachandra Kurup, E. Suresh. Bis(quinoline-2-aldehyde) thiocarbohydrazone crystallizes in the tricliniccrystal system with two independent molecules in the asymmetric unit, and exists in the thione tautomeric form. Both molecules show a Z-Z configuration about both azomethinebonds, with quinoline nitrogens on opposite sides. The N–N, N–C and the C–S bond distances of the thiocarbohydrazide moiety suggest extensive electron delocalization of the whole thiocarbohydrazone moiety

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Acknowledgement

E. Manoj thanks the University Grants Commission, New Delhi, India for financial support in the form of fellowship.

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Authors and Affiliations

  1. Department of Applied Chemistry, Cochin University of Science and Technology, Kochi, 682 022, Kerala, India

    E. Manoj & M. R. Prathapachandra Kurup

  2. Analytical Science Division, Central Salt and Marine Chemicals Research Institute, Bhavnagar, 364 002, Gujarat, India

    E. Suresh

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  1. E. Manoj
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  2. M. R. Prathapachandra Kurup
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  3. E. Suresh
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Correspondence to M. R. Prathapachandra Kurup.

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Manoj, E., Kurup, M.R.P. & Suresh, E. Synthesis and Spectral Studies of Bisthiocarbohydrazone and Biscarbohydrazone of Quinoline-2-carbaldehyde: Crystal Structure of Bis(quinoline-2-aldehyde) Thiocarbohydrazone. J Chem Crystallogr 38, 157–161 (2008). https://doi.org/10.1007/s10870-007-9267-9

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  • DOI: https://doi.org/10.1007/s10870-007-9267-9

Keywords

  • Thiocarbohydrazone
  • Quinoline-2-aldehyde
  • Carbohydrazone
  • Crystal structure