[4-dimethylphosphorylbutyl(phenyl)phosphoryl]benzene

[4-diethylphosphorylbutyl(phenyl)phosphoryl]benzene

3-diethylphosphinothioylpropyl-diphenyl-sulfanylidene-λ⁵-phosphane

4-dimethylphosphinothioylbutyl-diphenyl-sulfanylidene-λ⁵-phosphane

4-diethylphosphinothioylbutyl-diphenyl-sulfanylidene-λ⁵-phosphane