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Abstract:

X-ray crystallography of the title complexes indicates a discrete mixed valence (Co2II-Co2III) 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, gxy = 3.001(25), and gz = 7.214(7) for 1 and J = 115(12) K, ΔJ = -58.5(2.5) K, gxy = 3.34(5), and gz = 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.

Registro:

Documento: Artículo
Título:Synthesis, crystal structure and magnetic studies of tetranuclear hydroxo and ligand bridged [Co4(μ3-OH) 2(μ2-dea)2(L-L)4] 4Cl·8H2O [L-L = 2,2′-bipyridine or 1,10-phenanthroline] complexes with mixed valence defect dicubane core
Autor:Siddiqi, Z.A.; Siddique, A.; Shahid, M.; Khalid, M.; Sharma, P.K.; Ahmad, M.; Kumar, S.; Lan, Y.; Powell, A.K.
Filiación:Department of Chemistry, Aligarh Muslim University, Aligarh-202002, India
Department of Chemistry, Indian Institute of Technology, Kanpur, India
DQIAQF/INQUIMAE, Universidad de Buenos Aires Ciudad Universitaria, p. 3, EHA1428 Buenos Aires, Argentina
Institut Für Anorganische Chemie, Karlsruher Institut Für Technologie, Engesserstrasse 15 Geb. 30.45, 76131 Karlsruhe, Germany
Palabras clave: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
Año:2013
Volumen:42
Número:26
Página de inicio:9513
Página de fin:9522
DOI: http://dx.doi.org/10.1039/c3dt50854d
Título revista:Dalton Transactions
Título revista abreviado:Dalton Trans.
ISSN:14779226
CODEN:DTARA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14779226_v42_n26_p9513_Siddiqi

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Citas:

---------- APA ----------
Siddiqi, Z.A., Siddique, A., Shahid, M., Khalid, M., Sharma, P.K., Ahmad, M., Kumar, S.,..., Powell, A.K. (2013) . Synthesis, crystal structure and magnetic studies of tetranuclear hydroxo and ligand bridged [Co4(μ3-OH) 2(μ2-dea)2(L-L)4] 4Cl·8H2O [L-L = 2,2′-bipyridine or 1,10-phenanthroline] complexes with mixed valence defect dicubane core. Dalton Transactions, 42(26), 9513-9522.
http://dx.doi.org/10.1039/c3dt50854d
---------- CHICAGO ----------
Siddiqi, Z.A., Siddique, A., Shahid, M., Khalid, M., Sharma, P.K., Ahmad, M., et al. "Synthesis, crystal structure and magnetic studies of tetranuclear hydroxo and ligand bridged [Co4(μ3-OH) 2(μ2-dea)2(L-L)4] 4Cl·8H2O [L-L = 2,2′-bipyridine or 1,10-phenanthroline] complexes with mixed valence defect dicubane core" . Dalton Transactions 42, no. 26 (2013) : 9513-9522.
http://dx.doi.org/10.1039/c3dt50854d
---------- MLA ----------
Siddiqi, Z.A., Siddique, A., Shahid, M., Khalid, M., Sharma, P.K., Ahmad, M., et al. "Synthesis, crystal structure and magnetic studies of tetranuclear hydroxo and ligand bridged [Co4(μ3-OH) 2(μ2-dea)2(L-L)4] 4Cl·8H2O [L-L = 2,2′-bipyridine or 1,10-phenanthroline] complexes with mixed valence defect dicubane core" . Dalton Transactions, vol. 42, no. 26, 2013, pp. 9513-9522.
http://dx.doi.org/10.1039/c3dt50854d
---------- VANCOUVER ----------
Siddiqi, Z.A., Siddique, A., Shahid, M., Khalid, M., Sharma, P.K., Ahmad, M., et al. Synthesis, crystal structure and magnetic studies of tetranuclear hydroxo and ligand bridged [Co4(μ3-OH) 2(μ2-dea)2(L-L)4] 4Cl·8H2O [L-L = 2,2′-bipyridine or 1,10-phenanthroline] complexes with mixed valence defect dicubane core. Dalton Trans. 2013;42(26):9513-9522.
http://dx.doi.org/10.1039/c3dt50854d