...
首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Transition metal chemistry of cyclodiphosphanes containing phosphine and amide-phosphine functionalities: Formation of a stable dipalladium(II) complex containing a Pd-P σ-bond.
【24h】

Transition metal chemistry of cyclodiphosphanes containing phosphine and amide-phosphine functionalities: Formation of a stable dipalladium(II) complex containing a Pd-P σ-bond.

机译:含膦和酰胺-膦官能团的环二膦的过渡金属化学:形成具有Pd-Pσ键的稳定的二钯(II)配合物。

获取原文
获取原文并翻译 | 示例
           

摘要

Cyclodiphosphazanes containing phosphine or phosphine plus amide functionalities {(~tBuNP(OC_6H_4PPh _2-o)}_2 (3), {~tBuNP(OCH_2CH _2PPh_2)}_2 (4), {~tBuHN(~tBuNP)_2OC_6H_4PPh_2-o} (5), and {~tBuHN(~tBuNP)_2OCH_2CH _2PPh_2} (6) were synthesized by reacting cis-{ ~tBuNPCl}_2 (1) and cis-[~tBuHN(~tBuNP)_2Cl] (2) with corresponding phosphine substituted nucleophiles. The reactions of 3 and 5 with excess of elemental sulfur or selenium produce the corresponding tetra and trichalcogenides, {(~tBuNP(E)(OC_6H_4P(E)Ph_2-o)} _2 (7, E = S; 8, E = Se) and {~tBuHN(~tBuNP) _2OC_6H_4P(E)Ph_2-o} (9, E = S; 10, E = Se), respectively, in quantitative yields. The reactions between 3 and [Rh(COD)Cl]_2 or [M(COD)Cl]_2 (M = Pd or Pt) afford bischelated complexes [Rh(CO)Cl{~tBuNP(OC_6H _4PPh_2-o)}]_2 (11), and [MCl_2{ ~tBuNP(OC_6H4PPh_2-o)}]_2 (12, M = Pd; 13, M = Pt) in good yield. The 1:2 reaction between 3 and [PdCl(η~3-C_3H_5)]_2 in dichloromethane resulted initially in the formation of a tripalladium complex of the type [Pd_3Cl_4(η~3-C_3H _5)_2{~tBuNPOC_6H_4PPh _2}_2] (14a) which readily reacts with moisture to form an interesting binuclear complex, [Cl_2Pd{μ-(PPh_2C _6H_4OP(μ-~tBuN)_2P(O)}(μ-Cl) Pd(OC_6H_4PPh_2)] (14b). One of the palladium(ii) atoms forms a simple six-membered chelate ring, whereas the other palladium(ii) atom facilitates the moisture assisted cleavage of one of the endocyclic P-O bonds followed by the oxidation of P(iii) to P(v) thus forming a Pd-P σ-bond. The broken ortho-phosphine substituted phenoxide ion forms a five-membered palladacycle with the same palladium(ii) atom. Similar reaction of 5 with [PdCl(η~3-C_3H_5)]_2 also affords a binuclear complex [{PdCl(η~3-C_3H _5)}~tBuNH{~tBuNP}_2OC_6H _4PPh_2{PdCl_2}] (15) containing a PdCl _2 moiety which forms a six-membered chelate ring via ring-phosphorus and PPh_2 moieties on one side and a PdCl(η~3-C _3H_5) fragment coordinating to amide bound phosphorus atom on the other side of the ring. Treatment of 3 with four equivalents of AuCl(SMe_2) produces a tetranuclear complex, [(AuCl)_4{ ~tBuNP(OC_6H_4PPh_2)}_2] (16), whereas a 1:3 reaction between 5 and AuCl(SMe_2) leads to the formation of a trinuclear complex, [~tBuNH{~tBuNP(AuCl)} _2OC_6H_4P(AuCl)Ph_2] (17). The crystal structures of 3, 5, 9-11 and 13-17 are reported.
机译:含有膦或膦加上酰胺官能团的环二磷氮烷{(〜tBuNP(OC_6H_4PPh _2-o)} _ 2(3),{〜tBuNP(OCH_2CH _2PPh_2)} _ 2(4),{〜tBuHN(〜tBuNP)_2OC_6H_4PPh_2-o}(5 )和{〜tBuHN(〜tBuNP)_2OCH_2CH _2PPh_2}(6)通过使顺式-{〜tBuNPCl} _2(1)和顺式-[〜tBuHN(〜tBuNP)_2Cl](2)与相应的膦取代亲核试剂反应合成。3和5与过量的元素硫或硒的反应产生相应的四卤化和三卤化ides,{(〜tBuNP(E)(OC_6H_4P(E)Ph_2-o)} _2(7,E = S; 8,E = Se)和{〜tBuHN(〜tBuNP)_2OC_6H_4P(E)Ph_2-o}(9,E = S; 10,E = Se),分别以定量收率计算。3和[Rh(COD)Cl]之间的反应_2或[M(COD)Cl] _2(M = Pd或Pt)提供双螯合物[Rh(CO)Cl {〜tBuNP(OC_6H _4PPh_2-o)}] _ 2(11)和[MCl_2 {〜tBuNP(OC_6H4PPh_2) -o)}] _ 2(12,M = Pd; 13,M = Pt),产率高,3与[PdCl(η〜3-C_3H_5)] _ 2在二氯甲烷中的1:2反应最初导致生成三方碳c [Pd_3Cl_4(η〜3-C_3H _5)_2 {〜tBuNPOC_6H_4PPh _2} _2]类型的复合物(14a)易于与水分反应形成有趣的双核络合物[Cl_2Pd {μ-(PPh_2C _6H_4OP(μ-〜tBuN )_2P(O)}(μ-Cl)Pd(OC_6H_4PPh_2)](14b)。钯(ii)原子中的一个形成简单的六元螯合环,而另一个钯(ii)原子促进内环PO键之一的水分辅助裂解,随后将P(iii)氧化为P(v )从而形成Pd-Pσ键。断裂的邻膦取代的酚盐离子与相同的钯(ii)原子形成五元的palladacycle。 5与[PdCl(η〜3-C_3H_5)] _ 2的相似反应也提供了双核络合物[{PdCl(η〜3-C_3H _5)}〜tBuNH {〜tBuNP} _2OC_6H _4PPh_2 {PdCl_2}](15) PdCl _2部分在一侧通过环磷和PPh_2部分形成六元螯合环,而PdCl(η〜3-C _3H_5)片段在环的另一侧与酰胺键合的磷原子配位。用四当量的AuCl(SMe_2)处理3会产生四核复合物[(AuCl)_4 {〜tBuNP(OC_6H_4PPh_2)} _ 2](16),而5与AuCl(SMe_2)之间的1:3反应导致三核复合物[〜tBuNH {〜tBuNP(AuCl)} _2OC_6H_4P(AuCl)Ph_2]的形成(17)。报道了3、5、9-11和13-17的晶体结构。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号