Characterization of the chloranilate(*3-) pi radical as a strong spin-coupling bridging ligand.
Characterization of the chloranilate(*3-) pi radical as a strong spin-coupling bridging ligand.
复制标题
氯苯甲酸 (*3-) pi 自由基作为强自旋耦合桥配体的表征。
作者：
K. Min;A. Rheingold;A. DiPasquale;Joel S A Miller
对双核[（TPA）Co（II）（CA ~ 2-）Co（II）（TPA）]（BF_4）·2 MeOH（1）[TPA =三（2-吡啶甲基）胺]和[（TPA）Co（II）（CA ~ 3-）Co（II）（TPA）]（BF_4）·2Et_2O（2）进行了晶体学和磁性表征。1在Co（II）二聚体中显示出弱的反铁磁耦合[J/kB = -0.65 K（-0.45 cm（-1））]，而2在Co（II）离子和自由基之间具有2个数量级强的反铁磁相互作用[J/kB = -75 K（52 cm（-1））].
Dinuclear [(TPA)Co(II)(CA2-)Co(II)(TPA)](BF4)2.2MeOH (1) [TPA = tris(2-pyridylmethyl)amine] and [(TPA)CoII(CA*3-)CoII(TPA)](BF4).2Et2O (2) with a bridging chloranilate radical ligand formed by reduction of 1 are crystallographically and magnetically characterized. 1 has shown a weak antiferromagnetic coupling within the Co(II) dimer [J/kB = -0.65 K (-0.45 cm(-1))], while 2 has a 2 orders of magnitude stronger antiferromagnetic interaction between the Co(II) ion and a radical [J/kB = -75 K (52 cm(-1))].