An In Situ Spectroelectrochemical Study Of The Dimeric Phthalocyanines [(Sipc)(2)O][Osihx(3)](2), [(Sipc)(2)O][Osihx(3)](2)(Center Dot+), And [(Sipc)(2)O][Osihx(3)](2)(2+)

An in situ spectroelectrochemical study of the oxidation of the mu-oxosilicon phthalocyanine dimer [(SiPc)(2)O] [OSiHx(3)](2) utilizing cyclic voltammetry, electron spin resonance spectroscopy, and visible-near infrared spectroscopy has been carried out. The results of this study show that oxidation of the dimer yields the paramagnetic radical dimer [(SiPc)(2)O][OSiHx(3)](2)(center dot+) and then the diamagnetic dimer [(SiPc)(2)O][OSiHx(3)](2)(2+). The study shows that the rings of [(SiPc)(2)O][OSiHx(3)](2)(2+) are antiferromagnetically coupled.