854959-88-9Relevant academic research and scientific papers
Platinum(II) and mixed platinum(II)/gold(I) σ-alkynyl complexes. The first anionic σ-alkynyl metal polymers
Vicente, Jose,Chicote, Maria-Teresa,Alvarez-Falcon, Miguel M.,Jones, Peter G.
, p. 2764 - 2772 (2008/10/09)
The alkynes C6Me4(C≡CH)2-1,4, C 6Me4(C≡CH)2-1,2, and C6Me 3(C≡CH)3-1,3,5 react with cis-[PtCl 2(PAr3)2] and NHEt2 and a catalytic amount of CuI to give complexes trans-[Pt-(C≡CC6Me 4C≡CH-4)2(PAr3)2] [Ar = Ph (1a), C6H4Me-4 (To) (1b)], trans-[Pt(C≡CC 6Me4-C≡CH-2)2(PAr3) 2] [Ar = Ph (2a), To (2b)], and trans-[Pt{C≡CC 6Me3(C≡CH)2-3,5}2(PAr 3)2] [Ar = Ph (3a), To (3b)], respectively. The reactions of [Au(acac)PAr3] (acac = acetylacetonato) with complex la or lb (2:1) or with 3b (4:1) give the neutral mixed PtIIAuI 2 or PtIIAuI4 σ-alkynyl complexes trans- [Pt(C≡CC6Me4C≡CAuPAr 3-4)2(PAr3)2] [Ar = Ph (4a), To (4b)] or trans-[Pt{C≡CC6Me3(C≡CAuPTo 3)2-3,5}2(PTo3)2] (5b), respectively. Additionally, the replacement of the triarylphosphine ligands present in 1a, 2a, 4b, or 5b with various trialkylphosphines produces the homologous derivatives with PMe3 (1c, 2c, 4c, 5c), PEt3 (1d), or P(nBu)3 (1e), respectively. PPN[Au(acac) 2] reacts with complex 1a, 1c, or 1e (1:1) to give (PPN) n[trans-Pt{(C≡CC6Me4C≡C-4) 2Au}(PR3)2]n [R = Ph (6a), Me (6c), nBu (6e)], while its reaction with 3b (2:1) produces (PPN) 2n[trans-Pt{C≡CC6Me3(C≡C) 2-3,5Au2(PTo3)2]n (7). Complexes 6a, 6c, 6e, and 7 are the first anionic σ-alkynyl metal polymers described so far. The crystal structures of 1a·CHCl3, 2b·2CHCl3, and 4b·5CH2Cl2 have been determined. Each complex displays crystallographic inversion symmetry.
