Journal of Chemical Crystallography

, Volume 38, Issue 3, pp 157–161 | Cite as

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
Original Paper


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


Thiocarbohydrazone Quinoline-2-aldehyde Carbohydrazone Crystal structure 



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

Supplementary material

10870_2007_9267_MOESM1_ESM.pdf (68 kb)
(PDF 67 kb)


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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • E. Manoj
    • 1
  • M. R. Prathapachandra Kurup
    • 1
  • E. Suresh
    • 2
  1. 1.Department of Applied ChemistryCochin University of Science and TechnologyKochiIndia
  2. 2.Analytical Science DivisionCentral Salt and Marine Chemicals Research InstituteBhavnagarIndia

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