Ferromagnetic vs antiferromagnetic coupling in bis(mu-phenoxo)dicopper(II) complexes. Tuning of the nature of exchange coupling by remote ligand substituents.
Two bis(mu-phenoxo)dicopper(II) complexes, [(L(CH3))(2)Cu(2)] (1) and [(L(t-Bu))(2)Cu(2)] (2), where L(CH3) and L(t-Bu) represent the dianions of (methylamino)-N,N-bis(2-methylene-4,6-dimethylphenol) and of (methylamino)-N,N-bis(2-methylene-4,6-di-tert-butylphenol), respectively, are reported to demonstrate the effect of remote substituents on the nature of exchange coupling interactions between the copper(II) centers. In contrast to 1, which is as usual antiferromagnetically coupled, complex 2 is a rare example of a ferromagnetically coupled diphenoxodicopper(II) complex.
Chaudhuri
Phalguni
P
Max-Planck-Institute for Bioinorganic Chemistry, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany. Chaudh@mpi-muelheim.mpg.de
Wagner
Rita
R
Weyhermüller
Thomas
T
D003300:Copper / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D008024:Ligands; D008280:Magnetics; D009942:Organometallic Compounds; D010647:Phenyl Ethers
D005290:Ferric Compounds; D008024:Ligands; D009942:Organometallic Compounds; D010647:Phenyl Ethers; C001215:ferrite; D003300:Copper