Cobalt ( II ) chloride is one of the most common cobalt compounds . is +1.92 V , beyond that for chlorine to chloride , +1.36 V. As a consequence cobalt ( III ) and chloride would result in the cobalt ( III ) being reduced to cobalt ( II ) . Since the reduction potential for fluorine to fluoride is so high , +2.87 V , cobalt ( III ) fluoride is one of the few simple stable cobalt ( III ) compounds .