Английская Википедия:1,2-Bis(diphenylphosphino)ethylene
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cis-1,2-Bis(diphenylphosphino)ethylene (dppv) is an organophosphorus compound with the formula C2H2(PPh2)2 (Ph = C6H5). Both the cis and trans isomers are known, but the cis isomer is of primary interest. Classified as a diphosphine ligand, it is a bidentate ligand in coordination chemistry. For example it gives rise to the complex Ni(dppv)2 and the coordination polymer [Ni(dppv)]n.[1] As a chelating ligand, dppv is very similar to 1,2-bis(diphenylphosphino)benzene.
The diphosphine is prepared by reaction of lithium diphenylphosphide with cis-dichloroethylene.[2]
- 2Шаблон:NbspLiPPh2 + C2H2Cl2 → C2H2(PPh2)2 + 2Шаблон:NbspLiCl
trans-1,2-Bis(diphenylphosphino)ethylene is made similarly, but using trans-dichloroethylene.
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