New Organophosphorus Ligands: 1,1,4,4‐Tetrakis(diphenylphosphanyl)butatriene and Its Tetrasulfide

Hubert Schmidbaur, Stefan Manhart, Annette Schier

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Treatment of bis(diphenylphosphanyl)ethyne with potassium diphenylphosphide in tetrahydrofuran leads to the formation of tetraphenyldiphosphane Ph2P–PPh2 and the title compound (Ph2P)2C=C=C=C(PPh2)2 (1). A mechanism is proposed for this process. Compound 1 reacts with elemental sulfur to give the tetrasulfide [Ph2(S)P]2C=C=C=C[P(S)Ph2]2 (2). The crystal structures of 1 and 2 have been determined by single‐crystal X‐ray diffraction. In both cases the linear butatriene unit shows strongly alternating C=C bond lengths as predicted in theoretical studies.

Original languageEnglish
Pages (from-to)2389-2391
Number of pages3
JournalChemische Berichte
Issue number11
StatePublished - Nov 1993
Externally publishedYes


  • Butatriene, phosphanyl‐substituted
  • Phosphane ligands
  • Phosphane sulfide


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