1,2,3-Dithiazolyl and 1,2,35-Dithiadiazolyl Radicals as Spin-Bearing ...

e acting as a closed-shell, S = 0, bridging ligand. At room temperature, the χT product
is 2.4 cm 3 K mol -1 and remains mostly constant as the temperature is lowered to 100 K
before a decrease down to 0.9 cm 3
K mol -1 at 1.8 K indicates weak, dominant
antiferromagnetic interactions (Figure 2-10).
a
b
Scheme 2-4. Proposed
coupling schemes for a) II-11
and b) II-5
Figure 2-10. Magnetic susceptibility (χT) of II-11 and II-5 as a function
of temperature from 300 to 2 K at 1000 Oe.
2.3.3 [Mn(hfac) 2 ] 2·pymDSDA II-6
The χT product as a function of temperature from 300 down to 2 K at 1000 Oe has
been reported for the coordination complex of the pymDTDA with manganese (II-9). 2
This complex was isolated and the magnetic data collected again to confirm the
reproducibility of these results. Complex II-6 was found by X-ray crystallography to be
isomorphous to II-9 and so not surprisingly the magnetic data look similar (Figure 2-11).
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