... '-hydroxy-2,2':6',2''-terpyridine CAS: 101003-65-0 by reaction with phosphorus oxychloride. 4-Chloro-2,6-bis(pyridin-2-yl)pyridine is off-white crystal ... powder with good solubility in most of organinc solvent. Its applications are similar to 4'-bromo-2,2':6',2''-terpyridine ...