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首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >New E-unidentate [Ph2P(O)NP(E)Ph-2](-) (E = S or Se) complexes of palladium(II) and platinum(II)
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New E-unidentate [Ph2P(O)NP(E)Ph-2](-) (E = S or Se) complexes of palladium(II) and platinum(II)

机译:钯(II)和铂(II)的新的电子未知的[Ph2P(O)NP(E)Ph-2](-)(E = S或Se)配合物

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Metathesis of the monochloro metal(II) complexes [MCl(dien)] Cl (M=Pd or Pt; dien=diethylenetriamine) with K[Ph2P(O)-NP(E)Ph-2] (E=S or Se) or K[Ph2P(O) NPPh2] (prepared in situ from Ph2P(O)NHPPh2/KOBut) in methanol gave the cationic, mononuclear compounds [M(Ph2P(O)NP(E)Ph-2-E)(dien)](+) or [M(Ph2P(O)NPPh2-P)(dien)](+), isolated as their hexafluorophosphate salts. Ligand substitution reactions of the dichlorometal(II) precursors [MCl2(N similar to N)] (M = Pd or Pt; N similar to N = ethane-1,2-diamine, 1,2-diaminocyclohexane) with K[Ph2P(O)NP(E)Ph-2] or K[Ph2P(O)NPPh2] gave the neutral his substituted compounds [M{Ph2P(O)NP(E)Ph-2-E}(2)(N similar to N)] or [M{Ph2P(O)NPPh2-P}(2)(N similar to N)] in high yields (63-89%). Reaction of the unsymmetrical palladium(II) compound [PdCl2(ampy)] (ampy = 2-aminomethylpyridine) with K[Ph2P(O)NP(E)Ph-2] gave [Pd{Ph2P(O)NP(E)Ph-2-E}(2)(ampy)], analogous to the recently described compound [Pd{Ph2P(O)NP(E)Ph-2-E}(2)(en)], in which both [Ph2P(O)NP(E)Ph-2](-) ligands are exclusively E-monodentate bound. In contrast, transmetallation of K[Ph2P(O)NP(E)Ph-2] with [PdCl2(tmeda)] (tmeda =N,N,N',N'-tetramethylethylenediamine) gave only the O,E-chelate monocationic complexes [Pd{Ph2P(O)NP(E)Ph-2-O,E}(tmeda)]PF6 and not [Pd{Ph2P(O)NP(E)Ph-2-E}(2)(tmeda)]. Under similar reaction conditions the symmetrical anions [Ph2P(E)NP(E)Ph-2](-) (E=S or Se) gave, without exception, the known bis homoleptic complexes [M{Ph2P(E)NP(E)Ph-2-E,E'}(2)] (M=Pd or Pt) with displacement of all chloride and amine ligands. All new compounds have been characterised by a combination of multinuclear NMR (H-1, P-31{H-1}, Pt-195{H-1}), IR spectroscopy and elemental analyses. Furthermore, the X-ray crystal structures of five compounds have been determined and reveal a range of intermolecular and intramolecular hydrogen bonding contacts. There is also evidence for pi-delocalisation within the E-P-N-P-O and P-N-P-O backbones of the E-ligating or O,E-chelating ligand. (C) 2000 Elsevier Science Ltd All rights reserved. [References: 48]
机译:一氯金属(II)配合物[MCl(dien)] Cl(M = Pd或Pt; dien =二亚乙基三胺)与K [Ph2P(O)-NP(E)Ph-2](E = S或Se)的复分解或K [Ph2P(O)NPPh2](由Ph2P(O)NHPPh2 / KOBut原位制备)在甲醇中得到阳离子单核化合物[M(Ph2P(O)NP(E)Ph-2-E)(dien) ](+)或[M(Ph2P(O)NPPh2-P)(dien)](+),以六氟磷酸盐的形式分离。二氯金属(II)前体[MCl2(N与N相似)](M = Pd或Pt; N与N =乙烷-1,2-二胺,1,2-二氨基环己烷)的配体取代反应与K [Ph2P( O)NP(E)Ph-2]或K [Ph2P(O)NPPh2]赋予中性他的取代化合物[M {Ph2P(O)NP(E)Ph-2-E}(2)(N与N相似)]或[M {Ph2P(O)NPPh2-P}(2)(N类似于N)]高收率(63-89%)。非对称钯(II)化合物[PdCl2(ampy)](ampy = 2-氨基甲基吡啶)与K [Ph2P(O)NP(E)Ph-2]的反应得到[Pd {Ph2P(O)NP(E)Ph -2-E}(2)(ampy)],类似于最近描述的化合物[Pd {Ph2P(O)NP(E)Ph-2-E}(2)(en)],其中两个[Ph2P( O)NP(E)Ph-2](-)配体仅与E单齿结合。相反,K [Ph2P(O)NP(E)Ph-2]与[PdCl2(tmeda)](tmeda = N,N,N',N'-四甲基乙二胺)的金属转移仅产生O,E-螯合单阳离子[Pd {Ph2P(O)NP(E)Ph-2-O,E}(tmeda)] PF6而不是[Pd {Ph2P(O)NP(E)Ph-2-E}(2)(tmeda) ]。在相似的反应条件下,对称阴离子[Ph2P(E)NP(E)Ph-2](-)(E = S或Se)毫无例外地产生已知的双均纯络合物[M {Ph2P(E)NP(E )Ph-2-E,E'}(2)](M = Pd或Pt),并取代所有氯和胺配体。所有新化合物都通过多核NMR(H-1,P-31 {H-1},Pt-195 {H-1}),IR光谱和元素分析的组合进行表征。此外,已经确定了五种化合物的X射线晶体结构,它们揭示了分子间和分子内氢键接触的范围。也有证据表明在E-连接或O,E-螯合配体的E-P-N-P-O和P-N-P-O骨架中存在pi异位。 (C)2000 Elsevier Science Ltd保留所有权利。 [参考:48]

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