DAS, Manisha; GHOSH, Aloke Kumar; CLÉRAC, Rodolphe; MATHONIÈRE, Corine; RAY, Debashis

doi:10.1016/j.poly.2018.02.028

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DAS, Manisha
Department of Chemistry [IIT Kharagpur]

GHOSH, Aloke Kumar
Department of Chemistry, Indian Institute of Technology
Department of Chemistry, Prabhat Kumar College

CLÉRAC, Rodolphe
Centre de Recherche Paul Pascal [CRPP]

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Polyhedron. 2018-05, vol. 146, p. 136-144

Elsevier

Résumé en anglais

Distorted [Cu4(m3-OH)2] cubane type arrangements, one tetracationic and one neutral, have been achieved as [Cu2(m-H2bpmp)(m3OH)(H2O)]2(SO4)2.3H2O.CH3OH (1) and [Cu2(m-Hbpmp)(m3-OH) (m1,3-O2CCF3)]2.H2O.2CF3CO2H (2) [H3bpmp = 2,6-bis-[(3 hydroxypropylimino)methyl]-4-methylphenol] from the reactions of H3bpmp with CuSO4.5H2O and Cu(CF3CO2)2.xH2O in the presence of NEt3in MeOH medium. Two types of apical interactions of the CuII ion with H2O and CF3CO2. induced hydroxido- bridge supported aggregation of {Cu2} precursors. In MeOH solution, the reaction of 1 with CF3CO2. resulted in 2, showing a ligand-exchange reaction, leading to different Cu...O separations in the space on the open faces of the cubane structure. Magnetic susceptibility measurements (1.8–350 K) revealed stronger antiferromagnetic interactions in 1, where the average in plane Cu–O–Cu angle is 100.4°, than for 2, having a smaller Cu–O–Cu angle of 97.2°.< Réduire

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Schiff bases

X-ray diffraction

Jahn–Teller distortion

Carboxylate ligands

Magnetic properties

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Ligand exchange reaction in open-face [Cu4(µ3 -OH)2 ] cubane aggregates: Synthesis, structural change and difference in magnetic interactions

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