486. Olefin co-ordination compounds. Part IV. Diene complexes of platinum(II). The structure of Hofmann and von Narbutt's [dicyclopentadiene(RO)PtCl]

Abstract

Co-ordination C m v d . Part IV.* D i m C m p k e s of Platinum@). The Structure of Hofmurm and uon Narbutt's [Dio yc~opentadim(RO)PtC~].

Electrophilic Activation of Alkenes by Platinum(II): So Much More Than a Slow Version of Palladium(II)

“…Although the structures could not be conclusively identified at the time, it was suggested that a C À OMe bond, rather than a Pt À OMe bond, had been formed. Through reactivity studies, Chatt et al [10] demonstrated almost 50 years later that the products were chloridebridged dimers, and analysis by derivatization supported the original proposal that the methoxy group was associated not with Pt as a methoxide ligand, but with the organic dicyclopentadiene fragment. The research group of Stille [11,12] determined by NMR the structure of the monomeric pyridine adduct, which results from the exo attack of methanol at the more strained double bond to give the bmethoxy Pt-alkyl shown [Eq.…”

Two Dieneplatinum Synthetic Reagents, Pt(C6H2F3-2,4,6)2(cod) and Pt(C6HF4-2,3,4,5)2(cod)

“…PtCl 2 (cod) + 2 RLi ® PtR 2 (cod) + 2 LiCl (R = C 6 H 2 F 3 -2,4,6 or C 6 HF 4 -2, 3,4,5) The 1 H and 19 F NMR spectra support the identification with 3 J(Pt,F) and 2 J(Pt,HC=) coupling constants similar to those for Pt(C 6 F 5 ) 2 (cod) [6]. For 2, additional coupling to F3 but not F5 and to the ortho-H was observed.…”

Unsymmetrical complexes containing the linear tetraphosphine ligand DPPEPM

“…Solvents were distilled prior to use. [PtCl 2 (cod)], [PdCl 2 (cod)], [PtR 2 (cod)] (R = Me, Ph), [PtClR(cod)] (R = Me, Ph), and [PdClMe(cod)] were prepared as reported previously [22,[31][32][33][34]. 1 H and 31 P{ 1 H} NMR spectra were recorded on a Bruker ARX-500 or Avance 300, or a Varian Unity plus 300 spectrometer.…”

“…To this solution elemental sulfur (0.001 g, 0.0038 mmol) was added, and a yellow solution formed. 31 3 J PH = 7 Hz, 2 J PtH = 71 Hz, CH 3 ), 1.9-2.9 (several m, PCH 2 CH 2 P), 3.6-3.8 (br m, PCH 2 P), 6.8-7.8 (m, C 6 H 5 ).…”