title: Platinum complexes of naphthalene-1,8-dichalcogen and related polyaromatic hydrocarbon ligands.
abstract: Platinum bisphosphine complexes bearing dichalcogen-derivatised naphthalene, acenaphthene or phenanthrene ligands have been prepared by either oxidative addition to zero-valent platinum species or from [PtCl(2)(PPhR(2))] (R=Ph or Me) and the disodium or dilithium salts of the parent disulfur, diselenide or mixed S/Se species. The parent naphthalene, acenaphthene and phenanthrene chalcogen compounds were treated with either [Pt(PPh(3))(4)] or [Pt(C(2)H(4))(PMe(3))(2)] (prepared in situ from [PtCl(2)(PMe(3))(2)], ethene and sodium naphthalide or super hydride [LiBEt(3)H]) to give the appropriate platinum(II) species. The dilithium salts of 1,8-E(2)-naphthalene (E=S or Se) prepared in situ by reduction of the E-E bond with [LiBEt(3)H] were treated with [PtCl(2)(PPh(3))(2)] to give [Pt(1,8-E(2)-nap)(PPh(3))(2)]. The tetraoxides [Pt(1,8-(S(O)(2))(2)-nap)(PR(3))(2)] (PR(3)=PPh(3) or PMe(2)Ph) were prepared in a similar metathetical manner from the appropriate [PtCl(2)(PR(3))] complexes and the disodium salt of naphthalene 1,8-disulfinic acid (1,8-(S(O)ONa)(2)-nap). The X-ray structures of selected examples reveal bidentate coordination with the naphthalene-E(2) unit hinged (111-137 degrees) with respect to the coordination plane. The naphthalene ring suffers significant distortion from planarity.
authors.affiliation: Department of Chemistry, University of St Andrews, Fife KY16 9ST Scotland.
authors.forename: Stephen M
authors.initials: SM
authors.lastname: Aucott
authors.forename: Heather L
authors.initials: HL
authors.lastname: Milton
authors.forename: Stuart D
authors.initials: SD
authors.lastname: Robertson
authors.forename: Alexandra M Z
authors.initials: AM
authors.lastname: Slawin
authors.forename: Greg D
authors.initials: GD
authors.lastname: Walker
authors.forename: J Derek
authors.initials: JD
authors.lastname: Woollins
mesh_terms: D008024:Ligands; D008956:Models, Chemical; D015394:Molecular Structure; D009281:Naphthalenes / Q000138:chemical synthesis / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D010984:Platinum / Q000737:chemistry*; D011084:Polycyclic Aromatic Hydrocarbons / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D008024:Ligands; D009281:Naphthalenes; D009942:Organometallic Compounds; D011084:Polycyclic Aromatic Hydrocarbons; D010984:Platinum