Structural characterization of bis[dichloroaquo(pyridine N-oxide)copper(II)]

trans-Dichlorobis(2,4-dimethylthiazole)copper(II)

“…The two independent cis C1-Cu-N angles are 89.6(1) and 90.4(1) ° while the N-Cu-N' and C1-Cu-CI' trans angles are 179.0 (1) and 178.36 (8) °, respectively. The Cu-Cl bond length of 2.261 (2) A is, as expected, shorter than the bridging bond [2.322 (2) A] in the thiazole complex, but is similar to other terminal Cu-C1 bonds (Bream, Estes & Hodgson, 1975;Estes & Hodgson, 1976 (8) S-C(2)-N 112.3 (4) CI-Cu-N 89.6 (1) S-C(2)-C(6) 123.8 (4) CI-Cu-N' 90.4 (1) N-C(2)-C(6) 123.9 (4) N-Cu-N' 179.0 (1) N-C(4)-C(5) 114.5 (4) Cu-N-C(2) 124.0 (3) N-C(4)-C(7) 120.9 (4) Cu-N-C(4) 122.4 (3) C(5)-C(4)-C(7) 124.6 (4) C(2)-N-C(4) 113.6 (4) S-C(5)-C(4) 103.1 (4) C(2)-S-C(5) 96.4 (2) Goodman Wilson, Wasson, Hatfield & Hodgson, 1978) in related complexes. The Cu-N length of 1.985 (4) A is similar to those of 1.990 (2)/i, in Cu(tz)2Cl 2 and 2.004 (5) in Cu(py)2C12, and to those in a variety of related Cu I] complexes (Hodgson, 1975, 1977, andreferences therein).…”

Bis(2-dimethylaminopyridine 1-oxide)copper(II) diperchlorate

“…The oxide and amine atoms O(1) and N(2) lie 0.008 and 0.27/~, on one side of the ring plane, and the ring is inclined to the coordination plane by 24.5 ° . Bonding distances and angles within the ring are essentially the same as those found in other complexes containing the pyridine Noxide moiety (Estes & Hodgson, 1976;AI-Karaghouli & Wood, 1979).…”

The effect of antisymmetric exchange on the E.P.R. spectra of coupled pairs of transition metal ions

“…The complex is the manganese(II) doped dichloroaquo(pyridine-N-oxide)copper(II). The structure of the copper complex [6,25] is shown in figure 2. The copper(II) ions are strongly antiferromagnetically coupled [26] and at low temperature the host lattice is almost diamagnetic.…”

“…It is unfortunately impossible to determine the value of D a due to the impossibility of measuring D~1n and Dex. In order to check the order of magnitude of D a required to interpret the above data, we may assume D~n to be axial with D--0-05 cm 1 [22], D,x t ~ be the same as in the Cu-Cu couple, Dai p as can be calculated using standard procedures and the Cu-Cu direction seen in the crystal structure [6,25,30]. With these assumptions it is possible to reproduce the experimental data with D a numerically equal to Dai p but with the x and y axes interchanged.…”