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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Reactivity of 2-chalcogenopyridines with palladium-phosphine complexes: Isolation of different complexes depending on the nature of chalcogen atom and phosphine ligand
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Reactivity of 2-chalcogenopyridines with palladium-phosphine complexes: Isolation of different complexes depending on the nature of chalcogen atom and phosphine ligand

机译:2-硫属元素吡啶与钯-膦配合物的反应性:根据硫属元素原子和膦配体的性质,分离不同的配合物

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Reactions of either Pd(0) phosphine complexes with dipyridyldichalcogenides or [PdCl_2(P∩P)] (P∩P = dppe, dppp) with pyridylchalcogenolate ions have been examined and a variety of Pd(ii) complexes have been isolated and characterized. Oxidative addition of {SeC _5H_3(3-R)N}_2 (R = H or Me) to [Pd(P ∩P)_2] (P∩P = dppe, dppp) gave either a mononuclear complex, [Pd{2-Se-C_5H_3(3-R)N} _2(P∩P)] (for P∩P/R: dppe/H or Me; dppp/H) or a cationic binuclear complex, [Pd_2{μ-SeC _5H_3(3-Me)N}_2(dppp)_2]~(2+) (4b) (R = Me) whereas reactions involving the tellurium analogue exclusively afforded trinuclear complexes, [Pd_3(μ-Te)_2(P ∩P)_3]Cl_2 (P∩P = dppe (2) or dppp (6)). The latter was also obtained in the substitution reaction between [PdCl_2(P∩P)] and NaTeC_5H_3(3-R)N. The substitution reactions between [PdCl_2(dppe)] and Pb{EC _5H_3(3-R)N}_2 yielded mononuclear complexes, [Pd{2-E-C_5H_3(3-R)N}_2(dppe)] (1a-1e) (E = S, Se or Te) while in the case of [PdCl_2(dppp)], the reactions resulted in the formation of mono-, bi- and tri- nuclear complexes depending on the nature of the chalcogen atom (E = S, Se or Te) and the substituent on the pyridyl ring (R = H or Me). Treatment of dipyridyl ditellurides, {TeC5H 3(3-R)N}2 (R = H or Me), with [Pd(PPh3) 4] gave expected tellurolate complexes, [Pd{2-TeC_5H _3(3-R)N}_2(PPh3)2] (7a, 7b) which on prolonged standing in CDCl_3 solution gave green crystals of [PdCl{2-Te(Cl)_2C_5H_3(3-Me)N}(PPh_3)] (9). The molecular structures of {TeC_5H_3(3-Me)N} _2, [Pd_2{μ-TeC_5H_3(3-Me)N} _2(dppp)_2]Cl_2·3H_2O (5·3H_2O), [Pd_3(μ-Te)_2(dppp) _3]Cl_2·3CHCl_3 (6·3CHCl _3) and [PdCl{2-Te(Cl)_2C_5H_3(3-Me)N} (PPh_3)] (9) were established by single crystal X-ray diffraction analyses.
机译:研究了Pd(0)膦配合物与二吡啶基二卤化物或[PdCl_2(P∩P)](P∩P= dppe,dppp)与吡啶硫醇根酸酯离子的反应,并分离和表征了多种Pd(ii)配合物。将{SeC _5H_3(3-R)N} _2(R = H或Me)氧化添加到[Pd(P∩P)_2](P∩P= dppe,dppp)中可得到单核络合物[Pd {2 -Se-C_5H_3(3-R)N} _2(P∩P)](对于P∩P/ R:dppe / H或Me; dppp / H)或阳离子双核络合物[Pd_2 {μ-SeC_5H_3( 3-Me)N} _2(dppp)_2]〜(2+)(4b)(R = Me),而涉及碲类似物的反应仅提供三核配合物[Pd_3(μ-Te)_2(P∩P)_3 ] Cl_2(P∩P= dppe(2)或dppp(6))。后者也是在[PdCl_2(P∩P)]与NaTeC_5H_3(3-R)N之间的取代反应中获得的。 [PdCl_2(dppe)]与Pb {EC _5H_3(3-R)N} _2之间的取代反应产生单核络合物[Pd {2-E-C_5H_3(3-R)N} _2(dppe)](1a- 1e)(E = S,Se或Te),而在[PdCl_2(dppp)]的情况下,根据硫族原子的性质,反应导致形成单核,双核和三核配合物(E = S,Se或Te)和吡啶环上的取代基(R = H或Me)。用[Pd(PPh3)4]处理二吡啶基二碲化物{TeC5H 3(3-R)N} 2(R = H或Me)得到预期的碲化物复合物[Pd {2-TeC_5H _3(3-R)N } _2(PPh3)2](7a,7b)长时间放置在CDCl_3溶液中,得到绿色晶体[PdCl {2-Te(Cl)_2C_5H_3(3-Me)N}(PPh_3)](9)。 {TeC_5H_3(3-Me)N} _2,[Pd_2 {μ-TeC_5H_3(3-Me)N} _2(dppp)_2] Cl_2·3H_2O(5·3H_2O),[Pd_3(μ-Te)通过单晶X射线衍射分析确定了_2(dppp)_3] Cl_2·3CHCl_3(6·3CHCl _3)和[PdCl {2-Te(Cl)_2C_5H_3(3-Me)N}(PPh_3)](9)。 。

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