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- W2304376641 endingPage "144" @default.
- W2304376641 startingPage "137" @default.
- W2304376641 abstract "Abstract This paper reports the synthesis, X-ray crystal structure and magnetic characterization of two novel copper(II) dinuclear compounds including bis(imidazolyl) ligands and oxalate anions, [Cu2(BIM)2(C2O4)2]·4H2O (1) (BIM = bis(2-imidazolyl)methane) and [Cu2(BIK)2(C2O4)2] (2) (BIK = bis(2-imidazolyl)ketone). The oxalate anion acts as bidentate–monodentate in both cases, although it exhibits different coordination bridging modes: whereas in compound 1 a μ1,1,2-oxalato is observed, a μ1,2,3-oxalato is found in compound 2. In both cases, the 3D framework is held together by a combination of H-bonding and aromatic-aromatic interactions provided by the convenient structural features of BIM and BIK ligands and oxalate. EPR spectra are indicative of an essentially d x 2 - y 2 ground state for the copper(II) ions in both compounds. Magnetic susceptibility measurements reveal the existence of weak antiferromagnetic exchange interactions between the copper(II) ions (2J = −0.33(1) cm−1 for compound 1 and 2J = −1.45 (1) cm−1 for compound 2. Finally, the reported values of the singlet–triplet gap are compared with those observed in related copper(II) compounds with bidentate–monodentate out-of-plane oxalato bridges." @default.
- W2304376641 created "2016-06-24" @default.
- W2304376641 creator A5014079791 @default.
- W2304376641 creator A5031949580 @default.
- W2304376641 creator A5036546972 @default.
- W2304376641 creator A5040254811 @default.
- W2304376641 creator A5073143514 @default.
- W2304376641 creator A5077635345 @default.
- W2304376641 creator A5088545573 @default.
- W2304376641 date "2016-07-01" @default.
- W2304376641 modified "2023-10-18" @default.
- W2304376641 title "New dinuclear copper complexes incorporating bis(imidazolyl) based ligands and bidentate–monodentate oxalate bridges. Crystal structure and magnetic properties of [Cu2(BIM)2(C2O4)2]·4H2O and [Cu2(BIK)2(C2O4)2] (BIM=bis(2-imidazolyl)methane), BIK=bis(2-imidazolyl)ketone). Exploring magneto-structural correlations" @default.
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