1,1,3,3-tetraphenyl-1,3,2-diphospharsolane-1,3-diium,iodide

3-methylbut-2-enyl-[2-[3-methylbut-2-enyl(diphenyl)phosphaniumyl]ethyl]-diphenylphosphanium,chloride

2-[diphenyl(prop-2-enyl)phosphaniumyl]ethyl-diphenyl-prop-2-enylphosphanium,bromide

1-diphenylphosphanylbutan-2-yl(diphenyl)phosphane

cyclohexyl-[2-[cyclohexyl(phenyl)phosphanyl]ethyl]-phenylphosphane