James A. Barnes

The magnetic and spectral properties of the DI-μ-chlorobis[trichlorocuprate (II)] anion, [Cu2Cl8]4−

Abstract The magnetic susceptibility of [Co(en) 3 ] 2 [Cu 2 Cl 8 ]Cl 2 ·2H 2 O exhibits an antiferromagnetic transition near 15.5°K. Spin coupling is confirmed by EPR measurements. The near infrared spectrum of the complex is also reported.

The magnetic properties to 4·2K of the complex di-µ-hydroxybis(bipyridyl)dicopper(II) sulphate pentahydrate

The low-temperature magnetic susceptibility of the dimeric complex di-µ-hydroxybis(bipyridyl)dicopper(II) sulphate pentahydrate gives further support for the conclusion that the complex has a triplet ground state with a singlet excited state lying about 48 cm–1 above the ground state.

A five-co-ordinate copper dimer: the structure and magnetic properties of the di-µ-chlorobis[trichlorocuprate(II)] anion, [Cu2Cl8]4–

The [Cu2Cl8]4– ion, consisting of two distorted trigonal bipyramids linked by two chlorine bridges, has been shown to occur in Co(en)3CuCl5(H2O), and the magnetic properties of the dimer are found to be consistent with exchange coupled copper ions.