Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1305115 | Inorganic Chemistry Communications | 2006 | 5 Pages |
Abstract
Two dinuclear Cu(II) complexes [Cu2(dpyam)2(μ-C2O4)(Cl)2] (1) and [Cu2(dpyam)2 (μ-C2O4)(CF3SO3)2]n(2) have been synthesized and their spectroscopic (IR, ligand field and EPR) and magnetic properties characterized. The structure of 1 is made up of the centrosymmetric dinuclear [{Cu(dpyam)(Cl)}2(μ-C2O4)] units, while 2 contains chains of the dimeric [Cu2(dpyam)2(μ-C2O4)(CF3SO3)2] units linked by the triflate anions. The two copper atoms in both compounds are linked through a bis-didentate oxalato group leading to a metal-metal separation of 5.526(1) and 5.228(3) Ã
. The stereochemistry of the Cu(II) chromophore in 1 is approximately square pyramidal, while compound 2 displays an elongated octahedral Cu(II) environment. The magnetic susceptibility measurements, measured from 5 to 350Â K, revealed a very strong antiferromagnetic interaction between the Cu(II) atoms with a singlet-triplet energy gap (J) of â274 and â342Â cmâ1, for 1 and 2, respectively, in agreement with the coplanarity of the magnetic orbitals.
Related Topics
Physical Sciences and Engineering
Chemistry
Inorganic Chemistry
Authors
Sujittra Youngme, Achareeya Cheansirisomboon, Chanaiporn Danvirutai, Narongsak Chaichit, Chaveng Pakawatchai, Gerard A. van Albada, Jan Reedijk,