Luminescent Platinum−Tin-Bonded Metallacycles:  First Oxidative Addition of Sn−S Bonds

Abstract

In the first examples of oxidative addition of tin−sulfur bonds to a transition-metal complex, the ring compounds (R2SnS)3 (R = Me, Ph) react with [PtMe2( t bu2bpy)] ( t bu2bpy = 4,4‘-di-tert-butyl-2,2‘-bipyridine) to give the new luminescent organoplatinum(IV) complexes [PtMe2(R2SnS)2( t bu2bpy)] (1 and 2; R = Me and Ph, respectively), which contain the new five-membered PtSnSSnS ring. The complex [PtMe2{(SnMe2)S(SnPh2)S}( t bu2bpy)] (3) is formed selectively by any of the redistribution reactions between 1 and (Ph2SnS)3, 2 and (Me2SnS)3, or 1 and 2.

Extremely Facile Oxidative Addition of Silyl, Germyl, and Stannyl Tellurides and Other Chalcogenides to Platinum(0) Complexes. X-ray Structure of trans-Pt(4-PhC6H4Te)(SiMe3)(PEt3)2

“…In contrast to the tellurides, no reaction was observed between PhSSiMe 3 and Pt(PEt 3 ) 3 even when a mixture was heated at 50 °C over 5 h . However, PhSeSiMe 3 did react, albeit more slowly than PhTeSiMe 3 , with Pt(PEt 3 ) 3 .…”

Oxidative Addition Reactions of Organoplatinum(II) Complexes with Nitrogen-Donor Ligands

“…In the first examples of oxidative addition of Sn−S bonds to a transition metal complex, the ring compounds (R 2 SnS) 3 (R = Me, Ph) react with [PtMe 2 ( t Bu 2 bpy)] to give the luminescent organoplatinum(IV) metallacycles [PtMe 2 (R 2 SnS) 2 ( t Bu 2 bpy)] (R = Me and Ph) which contain a 5-membered PtSnSSnS ring ( 13 ) . Interestingly, only two of the three R 2 SnS units present in (R 2 SnS) 3 are incorporated into the final products.…”

Synthesis and X-ray Crystal Structure of a Stable cis-1,2-bis(diphenylphosphino)ethene Monodentate Thiolate Platinum Complex and TGA Studies of its Precursors

“…1 However, those containing both a monodentate phosphine and a thiolate ligands are described as being unstable, as they undergo polymerization. 2,3 The most stable ones are those that possess two monodentate phosphines and a bidentate thiolate, or both bidentate thiolate and phosphine ligands. 2 We have been interested in platinun monometallic and heterobimetallic complexes contaning thiolate ligands, and have recently obtained the complexes shown in Figure 1.…”

“…4 Pt (IV) complexes related to 1 and 2 were reported to undergo reductive elimination of SnClR 3 to originate the corresponding Pt(II) compounds. 3,5 If 1 and 2 presented the same type of behavior, they would be usefull starting materials for the type of complex we were planning to prepare, especially from complex 1, upon reaction with dppen (dppen = Ph 2 PCH=CHPPh 2 ), as represented (Scheme1).…”