Synthesis and characterisation of iron and cobalt complexes with phosphinothiolate ligands

Paulo Pérez-Lourido, Jaime Romero, José A. García-Vázquez, Jesús Castro, Antonio Sousa, Lyndsey Cooper, Jonathan R. Dilworth, Raymond L. Richards, Yifan Zheng, Jon A. Zubieta

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Abstract

Neutral iron complexes of a series of arenephosphinothiol proligands, PhxP(ArSH)3-x, (x=0-2, Ar=C6H4, C6H3SiMe3) have been synthesised. Compounds [Fe{2-(Ph2PO)C6H4S}3] (1), [Fe{2-(Ph2P)-6(Me3Si)C6H3S} 3] (2), [Fe{2-(Ph2PO)-6(Me3Si)C 6H3S}3] (3) and [Fe2{PhP(C 6H4S-2)2}3] (4) were obtained most conveniently by the electrochemical oxidation of an iron anode in a cell containing an acetonitrile solution of the corresponding proligand. [Fe{2-(Ph2P)C6H4S}2(CO) 2] (5) was obtained by the addition of the appropriate proligand to an acetonitrile solution of FeCl2 saturated with CO. The reaction of FeCl2 with PhP(C6H4SH-2)2 in methanol in the presence of CO and bis-diphenylphosphinoethane (dppe) gave [Fe{PhP(C6H4S-2)2}(dppe)(CO)] (6) in good yield. The reaction of FeCl2 with the potentially tetradentate P(C6H4SH-2)3 proligand in presence of PMe 2Ph or dppe allows the synthesis of [Fe{P(C6H 4S-2)3}(PMe2Ph)2] (7) and [Fe{P(C6H4S-2)3}(dppe)] (8). Corresponding reactions of the phosphinothiolates with CoCl2 in the presence of CO and/or phosphine ligands gave [CoCl{PhP(C6H4S-2) 2}(dppe)] (9), [Co{PhP(C6H4S-2) 2}(dppe)(CO)]BPh4 (10), [Co{PhP(C6H 4S-2)2}(dppe) ] (11), [Co(P(C6H 4S-2)3L] (L=dppe, 12, L=PMe2Ph, 13. The X-ray crystal structures of complexes 2, 4, 7 and 8, are discussed.

Original languageEnglish (US)
Pages (from-to)193-202
Number of pages10
JournalInorganica Chimica Acta
Volume356
DOIs
StatePublished - Dec 3 2003

Keywords

  • Cobalt complexes
  • Iron complexes
  • Phosphinothiolate ligands

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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    Pérez-Lourido, P., Romero, J., García-Vázquez, J. A., Castro, J., Sousa, A., Cooper, L., Dilworth, J. R., Richards, R. L., Zheng, Y., & Zubieta, J. A. (2003). Synthesis and characterisation of iron and cobalt complexes with phosphinothiolate ligands. Inorganica Chimica Acta, 356, 193-202. https://doi.org/10.1016/S0020-1693(03)00398-0