65310-68-1Relevant academic research and scientific papers
The reactivity of dinuclear platina-β-diketones with phosphines: Diacetylplatinum(II) complexes and mononuclear platina-β-diketones
Albrecht, Christian,Wagner, Christoph,Steinborn, Dirk
, p. 2858 - 2866 (2008)
Addition of mono- and bidentate phosphines or of AsPh3 to the platina-β-diketone [Pt2{(COMe)2H}2(μ- Cl)2] (1) followed by the addition of NaOMe at -70°C resulted in the formation of diacetyl platinum(II) complexes cis-[Pt(COMe)2L 2] (L = PPh3, 2a; P(4-FC6H4) 3, 2b; PPh2(4-py), 2c; PMePh2, 2d; AsPh 3, 2d) and [Pt(COMe)2(Lcombining double inverted breveL)] (Lcombining double inverted breveL = dppe, 3b; dppp, 3c), respectively. The analogous reaction with dppm afforded the dinuclear complex cis-[{Pt(COMe) 2}2(μ-dppm)2] (4) that reacted in boiling acetone yielding [Pt(COMe)2(dppm)] (3a). The reactions 1 → 2/3 were found to proceed via thermally highly unstable cationic mononuclear platina-β-diketone intermediates [Pt{(COMe)2H}L 2]+ and [Pt{(COMe)2H}(Lcombining double inverted breveL)]+, respectively, that could be isolated as chlorides for Lcombining double inverted breveL = dppe (5a) and dppp (5b). The reversibility of the deprotonation of type 5 complexes with NaOMe yielding type 3 complexes was shown by the protonation of the diacetyl complex 3b with HBF4 yielding the platina-β-diketone [Pt{(COMe)2H}(dppe)](BF 4) (5c). All compounds were fully characterized by means of NMR and IR spectroscopies, and microanalyses. X-ray diffraction analysis was performed for the complex cis-[Pt(COMe)2(PPh3)2] ·H2O·CHCl3 (2a·H2O· CHCl3).
