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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >The Reactivity of Dinuclear Platina-beta-diketones with Phosphines: Diacetylplatinum(II) Complexes and Mononuclear Platina-beta-diketones
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The Reactivity of Dinuclear Platina-beta-diketones with Phosphines: Diacetylplatinum(II) Complexes and Mononuclear Platina-beta-diketones

机译:双核普拉坦-β-二酮与膦的反应性:二乙酰铂(II)配合物和单核普拉坦-β-二酮

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摘要

Addition of mono- and bidentate phosphines or of AsPh3 to the platina-beta-diketone [Pt-2{(COMe)(2)H}(2)(mu-Cl)(2)] (1) followed by the addition of NaOMe at -70 degrees C resulted in the formation of diacetyl platinum(II) complexes cis-[Pt(COMe)(2)L-2] (L = PPh3, 2a; P(4-FC,H,),, 2b,- PPh,(4-py), 2e; PMePh,, 1d; AsPh [Pt(COMe)(2)(L(sic)L)] (L(sic)L = dppe, 3b; dppp,3c), respectively. The analogous reaction with dppm afforded the dinuclear complex cis- [{Pt(COMe)(2)}(2)(mu-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-beta-diketone(sic) intermediates [Pt{(COMe)(2)H}L-2](+) and [Pt{(COMe)(2)H}(L(sic)L)](+), respectively, that could be isolated as chlorides for L(sic)L = 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-beta-diketone [Pt{(COMe)(2)H}(dppe)](BF4) (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)]center dot H2O center dot CHCl3 (2a center dot H2O center dot CHCl3).
机译:在铂-β-二酮[Pt-2 {(COMe)(2)H}(2)(mu-Cl)(2)](1)中添加单或双膦或AsPh3。 NaOMe在-70摄氏度下导致形成二乙酰基铂(II)配合物顺式[[Pt(COMe)(2)L-2](L = PPh3,2a; P(4-FC,H,),2b ,-PPh,(4-py),2e; PMePh ,, 1d; AsPh [Pt(COMe)(2)(L(sic)L)](L(sic)L = dppe,3b; dppp,3c),与dppm的类似反应得到双核配合物顺式[{Pt(COMe)(2)}(2)(mu-dPPM(2)](4),该丙酮在沸腾的丙酮中反应。 2)(dppm)](3a)。发现反应1-> 2/3是通过热高度不稳定的阳离子单核铂-β-二酮(sic)中间体[Pt {(COMe)(2)H} L- 2](+)和[Pt {(COMe)(2)H}(L(sic)L)](+),分别可以分离为L(sic)L = dppe(5a)和dppp的氯化物(5b)。二乙酰基复合物3b与HB的质子化显示了5型复合物与NaOMe产生3型复合物去质子化的可逆性。 F4产生铂-β-二酮[Pt {(COMe)(2)H}(dppe)](BF4)(5c)。所有化合物均通过NMR和IR光谱学以及微量分析进行了充分表征。对复合顺式[[Pt(COMe)(2)(PPh3)(2)]中心点H2O中心点CHCl3(2a中心点H2O中心点CHCl3)进行X射线衍射分析。

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