Synthesis, crystal structure and magnetic studies of tetranuclear hydroxo and ligand bridged [Co<inf>4</inf>(μ<inf>3</inf>-OH) <inf>2</inf>(μ<inf>2</inf>-dea)<inf>2</inf>(L-L)<inf>4</inf>] 4Cl·8H<inf>2</inf>O [L-L = 2,2′-bipyridine or 1,10-phenanthroline] complexes with mixed valence defect dicubane core

X-ray crystallography of the title complexes indicates a discrete mixed valence (Co<inf>2</inf>II-Co<inf>2</inf>III) defect dicubane molecular unit where each cobalt nucleus attains a distorted octahedral geometry. The α-diimine (L-L) chelator coordinated to each cobalt ion s...

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Publicado:	2013
Materias:	Carbon dioxide Cobalt Defects X ray crystallography 1 ,10-phenanthroline Hamiltonian approach Magnetic data Magnetic studies Molecular units Octahedral geometry Supramolecular architectures Water molecule Chelation
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14779226_v42_n26_p9513_Siddiqi http://hdl.handle.net/20.500.12110/paper_14779226_v42_n26_p9513_Siddiqi
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

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spelling	paper:paper_14779226_v42_n26_p9513_Siddiqi2023-06-08T16:18:12Z Synthesis, crystal structure and magnetic studies of tetranuclear hydroxo and ligand bridged [Co<inf>4</inf>(μ<inf>3</inf>-OH) <inf>2</inf>(μ<inf>2</inf>-dea)<inf>2</inf>(L-L)<inf>4</inf>] 4Cl·8H<inf>2</inf>O [L-L = 2,2′-bipyridine or 1,10-phenanthroline] complexes with mixed valence defect dicubane core Carbon dioxide Cobalt Defects X ray crystallography 1 ,10-phenanthroline Hamiltonian approach Magnetic data Magnetic studies Molecular units Octahedral geometry Supramolecular architectures Water molecule Chelation X-ray crystallography of the title complexes indicates a discrete mixed valence (Co<inf>2</inf>II-Co<inf>2</inf>III) defect dicubane molecular unit where each cobalt nucleus attains a distorted octahedral geometry. The α-diimine (L-L) chelator coordinated to each cobalt ion stops further polymerization or nuclearization. The water molecules in the lattice play a crucial role in the formation of the supramolecular architectures. Magnetic data were analyzed using the effective spin-1/2 Hamiltonian approach and the parameters are, J = 115(6) K, ΔJ = -57.0(1.2) K, g<inf>xy</inf> = 3.001(25), and g<inf>z</inf> = 7.214(7) for 1 and J = 115(12) K, ΔJ = -58.5(2.5) K, g<inf>xy</inf> = 3.34(5), and g<inf>z</inf> = 6.599(12) for 2 suggesting that only the g matrices are prone to the change of α-diimine chelator. © The Royal Society of Chemistry 2013. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14779226_v42_n26_p9513_Siddiqi http://hdl.handle.net/20.500.12110/paper_14779226_v42_n26_p9513_Siddiqi
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Carbon dioxide Cobalt Defects X ray crystallography 1 ,10-phenanthroline Hamiltonian approach Magnetic data Magnetic studies Molecular units Octahedral geometry Supramolecular architectures Water molecule Chelation
spellingShingle	Carbon dioxide Cobalt Defects X ray crystallography 1 ,10-phenanthroline Hamiltonian approach Magnetic data Magnetic studies Molecular units Octahedral geometry Supramolecular architectures Water molecule Chelation Synthesis, crystal structure and magnetic studies of tetranuclear hydroxo and ligand bridged [Co<inf>4</inf>(μ<inf>3</inf>-OH) <inf>2</inf>(μ<inf>2</inf>-dea)<inf>2</inf>(L-L)<inf>4</inf>] 4Cl·8H<inf>2</inf>O [L-L = 2,2′-bipyridine or 1,10-phenanthroline] complexes with mixed valence defect dicubane core
topic_facet	Carbon dioxide Cobalt Defects X ray crystallography 1 ,10-phenanthroline Hamiltonian approach Magnetic data Magnetic studies Molecular units Octahedral geometry Supramolecular architectures Water molecule Chelation
description	X-ray crystallography of the title complexes indicates a discrete mixed valence (Co<inf>2</inf>II-Co<inf>2</inf>III) defect dicubane molecular unit where each cobalt nucleus attains a distorted octahedral geometry. The α-diimine (L-L) chelator coordinated to each cobalt ion stops further polymerization or nuclearization. The water molecules in the lattice play a crucial role in the formation of the supramolecular architectures. Magnetic data were analyzed using the effective spin-1/2 Hamiltonian approach and the parameters are, J = 115(6) K, ΔJ = -57.0(1.2) K, g<inf>xy</inf> = 3.001(25), and g<inf>z</inf> = 7.214(7) for 1 and J = 115(12) K, ΔJ = -58.5(2.5) K, g<inf>xy</inf> = 3.34(5), and g<inf>z</inf> = 6.599(12) for 2 suggesting that only the g matrices are prone to the change of α-diimine chelator. © The Royal Society of Chemistry 2013.
title	Synthesis, crystal structure and magnetic studies of tetranuclear hydroxo and ligand bridged [Co<inf>4</inf>(μ<inf>3</inf>-OH) <inf>2</inf>(μ<inf>2</inf>-dea)<inf>2</inf>(L-L)<inf>4</inf>] 4Cl·8H<inf>2</inf>O [L-L = 2,2′-bipyridine or 1,10-phenanthroline] complexes with mixed valence defect dicubane core
title_short	Synthesis, crystal structure and magnetic studies of tetranuclear hydroxo and ligand bridged [Co<inf>4</inf>(μ<inf>3</inf>-OH) <inf>2</inf>(μ<inf>2</inf>-dea)<inf>2</inf>(L-L)<inf>4</inf>] 4Cl·8H<inf>2</inf>O [L-L = 2,2′-bipyridine or 1,10-phenanthroline] complexes with mixed valence defect dicubane core
title_full	Synthesis, crystal structure and magnetic studies of tetranuclear hydroxo and ligand bridged [Co<inf>4</inf>(μ<inf>3</inf>-OH) <inf>2</inf>(μ<inf>2</inf>-dea)<inf>2</inf>(L-L)<inf>4</inf>] 4Cl·8H<inf>2</inf>O [L-L = 2,2′-bipyridine or 1,10-phenanthroline] complexes with mixed valence defect dicubane core
title_fullStr	Synthesis, crystal structure and magnetic studies of tetranuclear hydroxo and ligand bridged [Co<inf>4</inf>(μ<inf>3</inf>-OH) <inf>2</inf>(μ<inf>2</inf>-dea)<inf>2</inf>(L-L)<inf>4</inf>] 4Cl·8H<inf>2</inf>O [L-L = 2,2′-bipyridine or 1,10-phenanthroline] complexes with mixed valence defect dicubane core
title_full_unstemmed	Synthesis, crystal structure and magnetic studies of tetranuclear hydroxo and ligand bridged [Co<inf>4</inf>(μ<inf>3</inf>-OH) <inf>2</inf>(μ<inf>2</inf>-dea)<inf>2</inf>(L-L)<inf>4</inf>] 4Cl·8H<inf>2</inf>O [L-L = 2,2′-bipyridine or 1,10-phenanthroline] complexes with mixed valence defect dicubane core
title_sort	synthesis, crystal structure and magnetic studies of tetranuclear hydroxo and ligand bridged [co<inf>4</inf>(μ<inf>3</inf>-oh) <inf>2</inf>(μ<inf>2</inf>-dea)<inf>2</inf>(l-l)<inf>4</inf>] 4cl·8h<inf>2</inf>o [l-l = 2,2′-bipyridine or 1,10-phenanthroline] complexes with mixed valence defect dicubane core
publishDate	2013
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14779226_v42_n26_p9513_Siddiqi http://hdl.handle.net/20.500.12110/paper_14779226_v42_n26_p9513_Siddiqi
_version_	1768545243728183296

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