Structural diversity of four-co-ordinate metal(II) compounds with the bidentate bis(diphenylselenophosphoryl)amide ligand, [M{N(PPh2Se)2-Se,Se'}2] (M=Sn, Pb, Zn, Cd or Hg)

V GarciaMontalvo, J Novosad, P Kilian, J D Woollins, A M Z Slawin, P G Y Garcia, M LopezCardoso, G EspinosaPerez, R CeaOlivares

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68 Citations (Scopus)

Abstract

The [N(PPh(2)Se)(2)](-) ion formed stable bis-chelates with M(II) (M = Sn, Pb, Zn, Cd or Hg), [M{N(PPh(2)Se)(2)-Se,Se'}(2)], which exhibit a large diversity of structural arrangements around the metal, as shown by X-ray crystallography. The tin(II) complex crystallises dimorphically, as yellow triclinic prisms (1) and red tetragonal octahedrons (1'). The yellow isomer is square planar, representing the first example of a true square-planar tin(II) spiro-compound. The red isomer and the lead(II) compound (2) exhibit a distorted psi-trigonal-bipyramidal co-ordination geometry with a vacant equatorial position, which suggests the presence of a stereoactive electron lone pair. The cadmium(II) and mercury(II) complexes (3 and 4) are tetrahedral.

Original languageEnglish
Pages (from-to)1025-1029
Number of pages5
JournalJournal of the Chemical Society, Dalton Transactions
Issue number6
DOIs
Publication statusPublished - 21 Mar 1997

Keywords

  • MOLECULAR-STRUCTURE
  • CRYSTAL-STRUCTURE
  • POLYFUNCTIONAL MOLECULES
  • RING ENLARGEMENT
  • SULFUR
  • CHEMISTRY
  • SELENIUM

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