Polezhaeva N.; Volodina Y.; Prosvirkin A.; Sakhibullina Y.; Chmutova G.
(2001)
4,5-Bis(diphenylphosphino)-1-phenylpyridazin-6-one reacts with ethyl iodide, 1,2-dichloroethane, 1,2-dibromomehtane, and o-dibromobenzene to give the corresponding bis-phosphonium salts which, depending on the halogen ...