Exchange interactions in halide-bridged chains of copper(II). Cu(Rpy)2X2

Coordination Compounds of Some 3d-Transition Metal Ions with N1-[4-(4-bromo-phenylsulfonyl)-benzoyl]-N4-(4-methoxyphenyl)- thiosemicarbazide

“…The parameter G = (g|| -2) / (g⊥-2) = 3.33, indicates an exchange interaction between the copper centers. In a D 4h geometry, this G < 4 value can be explained taking into account the existence of some exchange interactions between the two copper centers or super-exchange interactions between the two copper centers through the acetate bridge [11,12]. This statement is in agreement with the value of the magnetic moment (1.45 MB) which indicates an anti-ferromagnetic interaction between the two copper centers.…”

Spectroscopic Characterization and Catalytic Activity of Some Cu(II)-thiosemicarbazide Complexes

“…The present ESR spectrum is similar to that of the binuclear Cu(II) complexes [26]. The spectrum (Figure 2 has a broad single line attributed to dipolar broadening [27] and is probably due to insufficient spin-exchange narrowing toward the coalescence of four copper hyperfine lines to a single line. The same kind of powder ESR line shapes has been observed for many square-planar dimeric Cu(II) complexes [28].…”

Tetrapyridinebis(trichloroacetato)nickel(II)

“…For the structural and magnetic properties of transition metal complexes involving a pyridine or a substituted pyridine ligand, see: Crawford & Hatfield (1977); Marsh et al (1981); Swank & Willett (1980). For Ni-O and Ni-N bond lengths, see: Bentiss et al (2002); Rodopoulos et al (2001).…”

“…The structural and magnetic properties of transition metal complexes in the solid state have been the subjects of numerous recent publications. This is particularly true for the cases where L is pyridine or a substituted pyridine (Swank & Willett, 1980;Marsh et al, 1981;Crawford & Hatfield, 1977). Much of this work has been concerned with the correlation of the structural properties of these complexes with their magnetic properties.…”