Journal of Chemical Crystallography

, Volume 41, Issue 12, pp 1981–1987

Assembly of Dipicolinic Acid by Alkali-Metal Cations

Note

DOI: 10.1007/s10870-011-0187-3

Cite this article as:
Santra, S., Das, B. & Baruah, J.B. J Chem Crystallogr (2011) 41: 1981. doi:10.1007/s10870-011-0187-3

Abstract

Different types of structures of hydrogen-bond assemblies derived from partially deprotonated dipicolinic acid (LH2) molecules having alkali metal cation such as sodium, potassium and cesium are structurally characterised. These self assembled complexes have general formula [M(LH)(LH2)(H2O)m]nxH2O {m = 2, 3, n = 1, 2, n, and x = 0, 0.5 M = Na (1); K (2) and Cs(3)}. Sodium complex is a hepta-coordinate mononuclear complex; potassium complex is octa-coordinate complex with dinuclear K2O2 type of carboxylate core; whereas the cesium complex is nona-coordinate polymeric complex. All these complexes crystallises in Triclinic, P-1 space group. Sodium complex has a = 6.9003(4) Å; b = 11.1440(6)Å; c = 11.2059(5)Å; α = 85.695(4)º; β = 82.103(3)º; γ = 87.432(4)º and volume = 850.60(8) Å3Z = 2; Potassium complex has a = 7.0937(4)Å; b = 11.0034(5)Å; c = 11.2732(6)Å; α = 91.603(3)º; β = 96.088(3)º; γ = 97.207(4)º; volume = 867.29(8) Å3; Z = 1 and cesium complex has a = 7.1410(6)Å; b = 11.0625(8)Å; c = 12.0667(9)Å; α = 96.849(4)º; β = 93.850(4)º; γ = 105.495(4)º; volume = 907.14(12) Å3; Z = 2.

Graphical Abstract

Alkali metal complexes with general formula [M(LH)(LH2)(H2O)m]nxH2O {m = 2, 3, n = 1, 2, n, and x = 0, 0.5 M = Na (1); K (2) and Cs(3)} are characterised. Sodium complex is hepta-coordinate mononuclear complex; potassium complex is octa-coordinate dinuclear complex, whereas the cesium complex is nona-coordinate polymeric complex. These mono, di and polynuclear alkali metal complexes form H-bonded self-assemblies.
https://static-content.springer.com/image/art%3A10.1007%2Fs10870-011-0187-3/MediaObjects/10870_2011_187_Figa_HTML.gif

Keywords

Dipicolinic acidAlkali metal cationsSelf-assemblyHydrogen bondThermogravimetry

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Saikat Santra
    • 1
  • Babulal Das
    • 1
  • Jubaraj B. Baruah
    • 1
  1. 1.Department of ChemistryIndian Institute of Technology GuwahatiGuwahatiIndia