1402267-10-0Relevant articles and documents
Platinum(0) complexes with alkynylphosphane ligands
Berenguer, Jesus R.,Lalinde, Elena,Moreno, M. Teresa,Montano, Patricia
, p. 3645 - 3654 (2012)
The reactivity of the Pt0 derivative [Pt2(dba) 3] (dba = trans,trans-dibenzylideneacetone) towards PPh 2C≡CR [R = Ph, tolyl (Tol), C5H4N-2] and PPh2C≡CPPh2 (dppa) has been explored. Treatment of [Pt2(dba)3] with PPh2C≡CR (8 equiv.) in THF gave the tetrahedral complexes [Pt(PPh2C≡CR)4] [R = Ph (1), Tol (3), C5H4N-2 (5)], whereas reactions with a molar ratio of 1:4 afforded the binuclear derivatives [{Pt(PPh 2C≡CR)(μ-κP:I·2-PPh 2C≡CR)}2] [R = Ph (2), Tol (4) X-ray, C 5H4N-2 (6)], which were shown to be generated through the mononuclear complexes 1, 3 and 5 as intermediate species. An analogous reaction using 4 equiv. of PPh2C≡CPPh2 afforded [Pt 2(PPh2C≡CPPh2)2(μ- κ2PP'-PPh2C≡CPPh2)3] (7), in which two Pt(PPh2C≡CPPh2) fragments are joined through three bridging dppa ligands (μ- κ2PP'-PPh2C≡CPPh2). Attempts to crystallize 7 at -30 °C afforded crystals of [Pt2{PPh 2C≡CP(O)Ph2}2(μ- κ2PP'-PPh2C≡CPPh2)3] (8) by oxidation of the free end of the terminal dppa ligands. The compound was characterized by X-ray diffraction. Tetrahedral Pt0 complexes [Pt(PPh2C≡CR)4], which evolve into binuclear derivatives [{Pt(PPh2C≡CR)(μ-κP: I·2-PPh2C≡CR)}2] [R = Ph, tolyl, C5H4N-2], and binuclear compounds stabilized by a (μ-PPh2C≡CPPh2)3 triply bridging system have been prepared and fully characterized. Copyright