Showing papers by "M. Teresa Moreno published in 2001"
TL;DR: In this article, the optical properties of these complexes are presented, where the authors show that two eclipsed [Pt2Tl4(C⋮CtBu)8]2- fragments are connected by four bridging thallium(I) ions.
54 citations
TL;DR: In this article, the reactivity of cis-CCR2(COD) and cis/trans-[Pt(C6F5)2(tht)2] towards PPh2CCPPh2 (dppa) in several molar ratios was explored.
Abstract: The reactivity of cis-[Pt(CCR)2(COD)] (R = But, Ph) and cis/trans-[Pt(C6F5)2(tht)2] towards PPh2CCPPh2 (dppa) in several molar ratios has been explored. Treatment of cis-[Pt(CCR)2(COD)] with 1 equiv. of dppa leads to novel alkynyl Pt(II) dimers [Pt2(CCR)4(μ-dppa)2] (R = But1, Ph 2) with a double dppa-bridged system. However, the reactions with 2 equiv. of dppa only give mixtures of 1 or 2 and the expected cis-[Pt(CCR)2(dppa-κP)2] (R = But3, Ph 4). The analogous reactions using cis- or trans-[Pt(C6F5)2(tht)2] (tht = tetrahydrothiophene) as precursors afford, in 1 ∶ 1 molar ratio, the homologous pentafluorophenyl–bis(μ-dppa) diplatinum species [Pt2(C6F5)4(μ-dppa)2] 5 or the polymer trans-[Pt(C6F5)2(μ-dppa)]n7 and, in 1 ∶ 2 molar ratio, the mononuclear cis- or trans-[Pt(C6F5)2(dppa-κP)2] (6, 8) derivatives. The molecular structure of 5 has been confirmed by X-ray diffraction. Furthermore, [Pt2(CCR)4(μ-dppa)2] 1 and 2 react with 2 equiv. of cis-[Pt(C6F5)2(thf)2] to afford the tetranuclear bis(μ-alkynyl)bis(μ-dppa) platinum complexes [(C6F5)2Pt(μ-CCR)2Pt(μ-dppa)]2 (R = But9, Ph 10). However, a mixture of 9/10 and [(RCC)2Pt(μ-dppa)2Pt(μ-CCR)2Pt(C6F5)2] (R = But11, Ph 12) is observed if the reactions are carried out in 1 ∶ 1 molar ratios. Finally, dinuclear P-bonded mono μ-dppa complexes of type Q2[cis-{Pt(C6F5)2X}2(μ-dppa)] [Q = NBu4, X = C6F513, X = Cl 14; Q = PMePh3, X = CCPh 15 (X-ray)] have also been prepared starting from the appropriate precursors and dppa.
23 citations