Fa. Cotton et al., A dichromium(II,II) compound with a strong antiferromagnetic coupling but little or no Cr-Cr bonding, INORG CHEM, 39(16), 2000, pp. 3728
The [Cr-2(azin)(4)Cl-2](2-) ion has been made and structurally characterize
d. Despite the long Cr-Cr distance (2.688(2) Angstrom), there is strong cou
pling of all electron spins, presumably by superexchange via the bridging s
pins, presumably by superexchange via the azin ligands (azin = anion of 7-a
zaindole).
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