Syntheses and crystal structures of mixed-ligand copper(II)–imidazole–carboxylate complexes

Syeda Shahzadi Batool (Corresponding Author), William T A Harrison (Corresponding Author), Quratulain Syed, Muhammad Salman Haider

Research output: Contribution to journalArticle

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Abstract

The syntheses, characterization, and crystal structures of the reaction products of Cu2+ with imidazole (Himz) and different aromatic carboxylates, viz.: [Cu(Himz)2(cinn)2(H2O)] (1), [Cu(Himz)2(paba)2] (2) and [Cu(Himz)2(clba)2] (3) (cinn– = C9H7O2–, paba– = C7H6NO2–, clba– = C7H4ClO2–) are described and studied by spectroscopic (UV–visible, FTIR) measurements. Single-crystal X-ray diffraction analyses indicate that each complex is monomeric. The metal ion in 1 adopts square-pyramidal coordination geometry arising from two imidazole nitrogens, two cinnamate oxygens, and an apical aqua. The metal ions of 2 and 3, however, assume a square planar configuration, which is realized by coordination of two nitrogens of two imidazoles and two oxygens; in both complexes, the imidazole moieties are trans to each other. TGA results indicate that upon heating, these complexes lose their carboxylate anions first, followed by removal of the imidazole molecules.
Original languageEnglish
Pages (from-to)1380-1391
Number of pages12
JournalJournal of Coordination Chemistry
Volume71
Issue number9
Early online date25 Apr 2018
DOIs
Publication statusPublished - 2018

Fingerprint

imidazoles
Metal ions
Copper
Crystal structure
Ligands
Nitrogen
copper
ligands
crystal structure
Oxygen
synthesis
Reaction products
Negative ions
Cinnamates
carboxylates
Single crystals
Imidazoles
metal ions
Heating
X ray diffraction

Keywords

  • copper(II) carboxylate
  • 2-Chlorobenzoic acid
  • cinnamic acid
  • imidazole
  • p-aminobenzoic acid

Cite this

Syntheses and crystal structures of mixed-ligand copper(II)–imidazole–carboxylate complexes. / Batool, Syeda Shahzadi (Corresponding Author); Harrison, William T A (Corresponding Author); Syed, Quratulain ; Haider, Muhammad Salman .

In: Journal of Coordination Chemistry, Vol. 71, No. 9, 2018, p. 1380-1391.

Research output: Contribution to journalArticle

Batool, Syeda Shahzadi ; Harrison, William T A ; Syed, Quratulain ; Haider, Muhammad Salman . / Syntheses and crystal structures of mixed-ligand copper(II)–imidazole–carboxylate complexes. In: Journal of Coordination Chemistry. 2018 ; Vol. 71, No. 9. pp. 1380-1391.
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title = "Syntheses and crystal structures of mixed-ligand copper(II)–imidazole–carboxylate complexes",
abstract = "The syntheses, characterization, and crystal structures of the reaction products of Cu2+ with imidazole (Himz) and different aromatic carboxylates, viz.: [Cu(Himz)2(cinn)2(H2O)] (1), [Cu(Himz)2(paba)2] (2) and [Cu(Himz)2(clba)2] (3) (cinn– = C9H7O2–, paba– = C7H6NO2–, clba– = C7H4ClO2–) are described and studied by spectroscopic (UV–visible, FTIR) measurements. Single-crystal X-ray diffraction analyses indicate that each complex is monomeric. The metal ion in 1 adopts square-pyramidal coordination geometry arising from two imidazole nitrogens, two cinnamate oxygens, and an apical aqua. The metal ions of 2 and 3, however, assume a square planar configuration, which is realized by coordination of two nitrogens of two imidazoles and two oxygens; in both complexes, the imidazole moieties are trans to each other. TGA results indicate that upon heating, these complexes lose their carboxylate anions first, followed by removal of the imidazole molecules.",
keywords = "copper(II) carboxylate, 2-Chlorobenzoic acid, cinnamic acid, imidazole, p-aminobenzoic acid",
author = "Batool, {Syeda Shahzadi} and Harrison, {William T A} and Quratulain Syed and Haider, {Muhammad Salman}",
note = "Crystallographic data for the structures in this paper have been deposited with the Cambridge Crystallographic Data Center, CCDC, 12 Union Road, Cambridge CB2 1EZ, UK. Copies of the data can be obtained free of charge on quoting depository numbers CCDC-1543434 (1), CCDC-1543435 (2) and CCDC-1543436 (3) (Fax:+44-1223-336–033; E-mail: deposit@ccdc.cam.ac.uk; http://www.ccdc.cam.ac.uk). Supplemental data for this article can be accessed at https://doi.org/10.1080/00958972.2018.1460471.",
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AU - Haider, Muhammad Salman

N1 - Crystallographic data for the structures in this paper have been deposited with the Cambridge Crystallographic Data Center, CCDC, 12 Union Road, Cambridge CB2 1EZ, UK. Copies of the data can be obtained free of charge on quoting depository numbers CCDC-1543434 (1), CCDC-1543435 (2) and CCDC-1543436 (3) (Fax:+44-1223-336–033; E-mail: deposit@ccdc.cam.ac.uk; http://www.ccdc.cam.ac.uk). Supplemental data for this article can be accessed at https://doi.org/10.1080/00958972.2018.1460471.

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N2 - The syntheses, characterization, and crystal structures of the reaction products of Cu2+ with imidazole (Himz) and different aromatic carboxylates, viz.: [Cu(Himz)2(cinn)2(H2O)] (1), [Cu(Himz)2(paba)2] (2) and [Cu(Himz)2(clba)2] (3) (cinn– = C9H7O2–, paba– = C7H6NO2–, clba– = C7H4ClO2–) are described and studied by spectroscopic (UV–visible, FTIR) measurements. Single-crystal X-ray diffraction analyses indicate that each complex is monomeric. The metal ion in 1 adopts square-pyramidal coordination geometry arising from two imidazole nitrogens, two cinnamate oxygens, and an apical aqua. The metal ions of 2 and 3, however, assume a square planar configuration, which is realized by coordination of two nitrogens of two imidazoles and two oxygens; in both complexes, the imidazole moieties are trans to each other. TGA results indicate that upon heating, these complexes lose their carboxylate anions first, followed by removal of the imidazole molecules.

AB - The syntheses, characterization, and crystal structures of the reaction products of Cu2+ with imidazole (Himz) and different aromatic carboxylates, viz.: [Cu(Himz)2(cinn)2(H2O)] (1), [Cu(Himz)2(paba)2] (2) and [Cu(Himz)2(clba)2] (3) (cinn– = C9H7O2–, paba– = C7H6NO2–, clba– = C7H4ClO2–) are described and studied by spectroscopic (UV–visible, FTIR) measurements. Single-crystal X-ray diffraction analyses indicate that each complex is monomeric. The metal ion in 1 adopts square-pyramidal coordination geometry arising from two imidazole nitrogens, two cinnamate oxygens, and an apical aqua. The metal ions of 2 and 3, however, assume a square planar configuration, which is realized by coordination of two nitrogens of two imidazoles and two oxygens; in both complexes, the imidazole moieties are trans to each other. TGA results indicate that upon heating, these complexes lose their carboxylate anions first, followed by removal of the imidazole molecules.

KW - copper(II) carboxylate

KW - 2-Chlorobenzoic acid

KW - cinnamic acid

KW - imidazole

KW - p-aminobenzoic acid

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SP - 1380

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JO - Journal of Coordination Chemistry

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SN - 0095-8972

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