Synthesis and characterisation of double-layered octahedral coordination polymers built up from divalent metal ions, mixed carboxylate anions, and ethyl carbazate ligands

Krishnan Srinivasan* (Corresponding Author), Subbiyan Poornima, Subbaiah Govindarajan (Corresponding Author), William T. A. Harrison (Corresponding Author)

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

A new family of mixed formate–acetate containing coordination polymers of formulae M(HCOO)2–x(CH3COO)x(C3H8N2O2) [M = Mn (1), Co (2), Zn (3) and Cd (4)] and Cd(CH3COO)2(C3H8N2O2) (5) (C3H8N2O2 = ethyl carbazate) are described. The compounds have been crystallised from aqueous solution and characterised using elemental analysis, IR and UV/visible spectroscopy, TGA, NMR and PXRD and the single-crystal structures of 1 and 3 have been determined. These isostructural compounds consist of M2+ ions coordinated by N,O-chelating ethyl carbazate molecules and four bridging acetate or formate anions (some of which are disordered). The resulting coordination polyhedra for the metal atoms are distorted MO5N octahedra. The polyhedral connectivity (via both formate and acetate bridges) generates double layers propagating in (100) with the topology of a square grid for the metal … metal links. Intra-layer NH…O hydrogen bonds help to establish the structures.
Original languageEnglish
Pages (from-to)519-523
Number of pages5
JournalJournal of Molecular Structure
Volume1184
Early online date16 Feb 2019
DOIs
Publication statusPublished - 15 May 2019

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formic acid
Anions
Metal ions
Polymers
Metals
Ligands
Acetates
Chelation
Nuclear magnetic resonance spectroscopy
Hydrogen bonds
Crystal structure
Topology
Single crystals
Ions
Atoms
Molecules
Chemical analysis
carbazic acid

Keywords

  • Layered coordination network
  • Mixed carboxylate
  • Bidendate ligand
  • Crystal structure
  • ZN
  • MAGNETIC-PROPERTIES
  • CO
  • ORGANIC FRAMEWORKS
  • FAMILY

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy
  • Inorganic Chemistry
  • Organic Chemistry

Cite this

Synthesis and characterisation of double-layered octahedral coordination polymers built up from divalent metal ions, mixed carboxylate anions, and ethyl carbazate ligands. / Srinivasan, Krishnan (Corresponding Author); Poornima, Subbiyan; Govindarajan, Subbaiah (Corresponding Author); Harrison, William T. A. (Corresponding Author).

In: Journal of Molecular Structure, Vol. 1184, 15.05.2019, p. 519-523.

Research output: Contribution to journalArticle

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abstract = "A new family of mixed formate–acetate containing coordination polymers of formulae M(HCOO)2–x(CH3COO)x(C3H8N2O2) [M = Mn (1), Co (2), Zn (3) and Cd (4)] and Cd(CH3COO)2(C3H8N2O2) (5) (C3H8N2O2 = ethyl carbazate) are described. The compounds have been crystallised from aqueous solution and characterised using elemental analysis, IR and UV/visible spectroscopy, TGA, NMR and PXRD and the single-crystal structures of 1 and 3 have been determined. These isostructural compounds consist of M2+ ions coordinated by N,O-chelating ethyl carbazate molecules and four bridging acetate or formate anions (some of which are disordered). The resulting coordination polyhedra for the metal atoms are distorted MO5N octahedra. The polyhedral connectivity (via both formate and acetate bridges) generates double layers propagating in (100) with the topology of a square grid for the metal … metal links. Intra-layer NH…O hydrogen bonds help to establish the structures.",
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