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Title: Ferromagnetic vs antiferromagnetic coupling in structurally analogous binuclear complexes based on salen type ligand
Authors: Pandey, Rampal
Ribas, Joan
Corbella, Montserrat
Pandey, Daya Shankar
Keywords: Coordination chemistry
Supramolecular assembly
Polymetallic complexes
Dinuclear complexes
Schiff bases
Ferromagnetic coupling
Antiferromagnetic coupling
Electrochemical properties
Cryomagnetic properties
Issue Date: Sep-2011
Publisher: NISCAIR-CSIR, India
Abstract: Syntheses of the dinuclear complexes [Co(C<sub>23</sub>H<sub>18</sub>N<sub>2</sub>O<sub>2</sub>)]<sub>2 </sub>(<b style="">1</b>), [Cu(C<sub>23</sub>H<sub>18</sub>N<sub>2</sub>O<sub>2</sub>)]<sub>2</sub><sup>.</sup>H<sub>2</sub>O (<b style="">2</b>), [Ni(C<sub>23</sub>H<sub>18</sub>N<sub>2</sub>O<sub>2</sub>)]<sub>2</sub> (<b style="">3</b>), [Zn(C<sub>23</sub>H<sub>18</sub>N<sub>2</sub>O<sub>2</sub>)]<sub>2</sub> (<b style="">4</b>) and [Cd(C<sub>23</sub>H<sub>18</sub>N<sub>2</sub>O<sub>2</sub>)]<sub>2</sub> (<b style="">5</b>)<b style=""> </b>containing the Schiff base ligand N,N′-bis(2-hydroxybenzilidene)-2,4,6-trimethylbenzene-1,3-diamine have been described. The complexes under investigation have been characterized by elemental analyses, IR, NMR<sup> </sup>(<sup>1</sup>H, <sup>13</sup>C), electronic absorption, emission and EPR spectral studies. The structure of (<b style="">1</b>) has been determined by X-ray single crystal analyses. Variable temperature magnetic susceptibility measurements on (<b style="">1</b>) and (<b style="">2</b>) reveal that the former displays antiferromagnetic coupling (<i style="">J</i> = -0.21 ± 0.1 cm<sup>-1</sup>), while the latter exhibits ferromagnetic coupling (<i style="">J</i> = + 1.23 ± 0.1 cm<sup>-1</sup>).
Description: 1450-1456
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.50A(09-10) [September-October 2011]

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