Extending the coordination chemistry of cobalt with the metalloligand [Pt2(μ-S)2(PPh3)4]: Synthesis of the first cobalt(III) derivatives
作者:Hannah M. Clarke、William Henderson、Brian K. Nicholson
DOI:10.1016/j.ica.2011.07.006
日期:2011.10
[Pt2(μ-S)2(PPh3)4CoTQ]+. Reactions of [Pt2(μ-S)2(PPh3)4], CoCl2·6H2O and dithiocarbamates gave cobalt(III) complexes [Pt2(μ-S)2(PPh3)4Co(S2CNR2)2]+ [R = Et or R2 = (CH2)4], and proceeded much more rapidly, consistent with the known ability of the dithiocarbamate ligand to stabilize cobalt in higher oxidation states. A study of the fragmentation of cobalt(III) adducts by positive-ion ESI mass spectrometry
摘要采用电喷雾电离质谱(ESI MS)指导的方法,研究了金属配体[Pt2(μ-S)2(PPh3)4]对钴(II)和钴(III)中心的配位化学。[Pt2(μ-S)2(PPh3)4]与CoCl2·6H2O在甲醇中的反应得到已知加合物[Pt2(μ-S)2(PPh3)4CoCl2]的绿黄色悬浮液,CoBr2加合物可以做同样的准备。当原位生成的[Pt2(μ-S)2(PPh3)4CoCl2]与8-羟基喹啉(HQ)和碱反应时,初始产物是钴(II)加合物[Pt2(μ-S)2(PPh3) )4CoQ] +,然后在空气中将其转化为六氟磷酸盐的钴(III)加合物[Pt2(μ-S)2(PPh3)4CoQ2] +。相应地制备了相应的吡啶甲酸(Pic)衍生物[Pt2(μ-S)2(PPh3)4Co(Pic)2] +,但是[Pt2(μ-S)2(PPh3)4]的反应 CoCl2·6H2O和8-(甲苯磺酰基氨基)喹啉(HTQ