Abstract
A mixed ligand and dimeric CuII complex [(phen) 2Cu(μ-L)Cu(phen)2]L • 12.5H2O (H 2L = succinic acid) containing bridging succinate moiety and also non-coordinated succinate dianion was prepared from polymeric Cu(II) succinate by nucleophilic reaction with o-phenanthroline (phen) followed by depolymerization. The dimeric product was characterized by crystallographic, spectroscopic and thermoanalytical studies. The complex crystallizes in triclinic crystal system and is composed of succinate bridged [(phen) 2Cu(μ-L)Cu(phen)2]2+ complex cations, non-coordinated succinate anions and hydrogen bonded water molecules. Within the dimeric cationic unit, each of the Cu atoms is octahedrally coordinated by four N atoms of both phen ligands and both O atoms of a carboxylate moiety of the bridging succinate group in chelating form. Through intermolecular π-π stacking interactions, the complex cations form positively charged 2-D layers, between which the non-coordinating succinate anions and water molecules are sandwiched. Both the electronic and EPR studies indicate that the dimeric complex undergoes partial dissociation in solution state to exist in two structural forms. The kinetic and thermodynamic parameters involved in three stage thermal decompositions of the dimeric complex could also be evaluated using Coats-Redfern method.
| Original language | English |
|---|---|
| Pages (from-to) | 3537-3544 |
| Number of pages | 8 |
| Journal | Inorganica Chimica Acta |
| Volume | 358 |
| Issue number | 13 |
| DOIs | |
| Publication status | Published - Sep 1 2005 |
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Keywords
- Bridging succinate
- Copper(II) succinate
- Crystal structure
- Cu(II) dimer
- EPR spectra
- Phenanthroline adduct
- Thermoanalytical studies
ASJC Scopus subject areas
- Biochemistry
- Inorganic Chemistry
- Physical and Theoretical Chemistry
- Materials Chemistry
Cite this
Succinate bridged dimeric Cu(II) system containing sandwiched non-coordinating succinate dianion : Crystal structure, spectroscopic and thermal studies of [(phen)2Cu(μ-L)Cu(phen)2]L • 12.5H2O (H2L = succinic acid; Phen = 1,10-phenanthroline). / Padmanabhan, M.; Kumary, S. Meena; Huang, Xiaoying; Li, Jing.
In: Inorganica Chimica Acta, Vol. 358, No. 13, 01.09.2005, p. 3537-3544.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Succinate bridged dimeric Cu(II) system containing sandwiched non-coordinating succinate dianion
T2 - Crystal structure, spectroscopic and thermal studies of [(phen)2Cu(μ-L)Cu(phen)2]L • 12.5H2O (H2L = succinic acid; Phen = 1,10-phenanthroline)
AU - Padmanabhan, M.
AU - Kumary, S. Meena
AU - Huang, Xiaoying
AU - Li, Jing
PY - 2005/9/1
Y1 - 2005/9/1
N2 - A mixed ligand and dimeric CuII complex [(phen) 2Cu(μ-L)Cu(phen)2]L • 12.5H2O (H 2L = succinic acid) containing bridging succinate moiety and also non-coordinated succinate dianion was prepared from polymeric Cu(II) succinate by nucleophilic reaction with o-phenanthroline (phen) followed by depolymerization. The dimeric product was characterized by crystallographic, spectroscopic and thermoanalytical studies. The complex crystallizes in triclinic crystal system and is composed of succinate bridged [(phen) 2Cu(μ-L)Cu(phen)2]2+ complex cations, non-coordinated succinate anions and hydrogen bonded water molecules. Within the dimeric cationic unit, each of the Cu atoms is octahedrally coordinated by four N atoms of both phen ligands and both O atoms of a carboxylate moiety of the bridging succinate group in chelating form. Through intermolecular π-π stacking interactions, the complex cations form positively charged 2-D layers, between which the non-coordinating succinate anions and water molecules are sandwiched. Both the electronic and EPR studies indicate that the dimeric complex undergoes partial dissociation in solution state to exist in two structural forms. The kinetic and thermodynamic parameters involved in three stage thermal decompositions of the dimeric complex could also be evaluated using Coats-Redfern method.
AB - A mixed ligand and dimeric CuII complex [(phen) 2Cu(μ-L)Cu(phen)2]L • 12.5H2O (H 2L = succinic acid) containing bridging succinate moiety and also non-coordinated succinate dianion was prepared from polymeric Cu(II) succinate by nucleophilic reaction with o-phenanthroline (phen) followed by depolymerization. The dimeric product was characterized by crystallographic, spectroscopic and thermoanalytical studies. The complex crystallizes in triclinic crystal system and is composed of succinate bridged [(phen) 2Cu(μ-L)Cu(phen)2]2+ complex cations, non-coordinated succinate anions and hydrogen bonded water molecules. Within the dimeric cationic unit, each of the Cu atoms is octahedrally coordinated by four N atoms of both phen ligands and both O atoms of a carboxylate moiety of the bridging succinate group in chelating form. Through intermolecular π-π stacking interactions, the complex cations form positively charged 2-D layers, between which the non-coordinating succinate anions and water molecules are sandwiched. Both the electronic and EPR studies indicate that the dimeric complex undergoes partial dissociation in solution state to exist in two structural forms. The kinetic and thermodynamic parameters involved in three stage thermal decompositions of the dimeric complex could also be evaluated using Coats-Redfern method.
KW - Bridging succinate
KW - Copper(II) succinate
KW - Crystal structure
KW - Cu(II) dimer
KW - EPR spectra
KW - Phenanthroline adduct
KW - Thermoanalytical studies
UR - http://www.scopus.com/inward/record.url?scp=24644448347&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=24644448347&partnerID=8YFLogxK
U2 - 10.1016/j.ica.2005.05.027
DO - 10.1016/j.ica.2005.05.027
M3 - Article
AN - SCOPUS:24644448347
VL - 358
SP - 3537
EP - 3544
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
SN - 0020-1693
IS - 13
ER -