The Synthesis of New Phosphonium Cyclopentadienylides and Fluorenylides and Several Derived Metal Complexes

Norman Holy, Ulrich Deschler, Hubert Schmidbaur

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

In a search for ambidentate chelating phosphane/ylide ligands two [(diphenylphosphino)alkyl]‐diphenylphosphonium fluorenylides 2a, b and 1,3‐propanediylbis(diphenylphosphonium fluorenylide) (5) were synthesized from α,ω‐bis(diphenylphosphino)alkanes (C6H5)2P[CH2]nP(C6H5)2, n = 1–3, and 9‐bromofluorene, via the parent phosphonium salts. [2‐(Diphenylphosphino)‐ethyl]diphenylphosphonium cyclopentadienylide (1b) could only be obtained in low yield. – Ylide 2a forms tetracarbonylmetal complexes with (CO)3W(NCCH3)3 and Cr(CO)6, which are assigned a chelating five‐membered ring structure, the cyclopentadienyl ring being in an unusual monohapto state of bonding (6a, b). A by‐product of the Cr(CO)6 reaction is identified as the Cr(CO)3 complex 7 with the metal attached to one benzene ring of the fluorene system. 1:1 complexes of PdCl2 and PtCl2 with 2a are again assigned a chelate monohapto‐fluorene mode of complexation (10a, b), but with 2b an ionic product 13 is encountered. HgCl2 forms 2:1 and 3:2 complexes with 2a, for which only tentative formulae can be proposed (e.g. 14). AuCl forms an ionic 1:1 complex 15 with the bis‐fluorenylide 5.

Original languageEnglish
Pages (from-to)1379-1388
Number of pages10
JournalChemische Berichte
Volume115
Issue number4
DOIs
StatePublished - Apr 1982
Externally publishedYes

Fingerprint

Dive into the research topics of 'The Synthesis of New Phosphonium Cyclopentadienylides and Fluorenylides and Several Derived Metal Complexes'. Together they form a unique fingerprint.

Cite this