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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >New 1,2,3-triazole based bis- and trisphosphine ligands: synthesis, transition metal chemistry and catalytic studies
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New 1,2,3-triazole based bis- and trisphosphine ligands: synthesis, transition metal chemistry and catalytic studies

机译:基于新的1,2,3-三唑基石和三膦配体:合成,过渡金属化学和催化研究

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The syntheses and transition metal chemistry of triazole-based bis- and tris-phosphines, 5-(diphenylphosphanyl)-1-(2-(diphenylphosphanyl)phenyl)-4-phenyl-1H-1,2,3-triazole (2), 5-(diphenylphosphanyl)-4(2-(diphenylphosphanyl)phenyl)-1-phenyl-1H-1,2,3-triazole (5), 1,4-bis(2-(diphenylphosphanyl)phenyl)1H-1,2,3-triazole (6) and 5-(diphenylphosphanyl)-1,4-bis(2-(diphenylphosphanyl)phenyl)-1H-1,2,3-triazole (7), are described. Bisphosphines 5 and 6 show versatile coordination behavior due to the presence of at least four donor atoms. The reactions of 5 and 6 with group VI metal carbonyl derivatives were found to be highly sensitive to the reaction conditions. Bisphosphine 5 upon treatment with [M (CO)4( piperidine)2] (M = Mo and W) yielded both P,P and P,N coordinated complexes [M(CO)4(5)] [M = Mo-kappa(2)-P,N (8); W-kappa(2)-P,N (9); Mo-kappa(2)- P,P (10); W-kappa(2)-P,P (11)], whereas 6 afforded only P,N coordinated complexes [{o-Ph2P(C6H4){1,2,3-N3C(o-Ph2P(C6H4))CH}-kappa(2)-P,N}Mo(CO)(4)] (12) and [{o-Ph2P(C6H4){1,2,3N(3)C(o-Ph2P(C6H4))CH}-kappa(2)-P,N}W(CO)(4)] (13). The reactions of 5 with [M(COD)Cl-2] (M = Pd and Pt) yielded kappa(2)-P,P chelate complexes 14 and 15, respectively, whereas the treatment of 6 with [Pd(COD)Cl-2] at ambient temperature resulted in the formation of a rare fused six-membered PCP pincer complex [{o-Ph2P(C6H4){1,2,3-N3C(o-Ph2P(C6H4))C}-kappa(3)-P, C,P}PdCl] (16). Similar reactions of 6 with [NiCl2(DME)] and [Pt(COD)Cl-2] in the presence of LiHMDS yielded [{o-Ph2P(C6H4){1,2,3-N3C(o-Ph2P(C6H4))C}-kappa(3)-P,C,P} NiCl] (17) and [{o-Ph2P(C6H4){1,2,3-N3C(o-Ph2P(C6H(4)))C}-kappa(3)-P,C,P}PtCl] (18), respectively. The reaction between 6 and [M(COD)Cl](2) (M = Rh and Ir) produced cationic complexes [{o-Ph2P(C6H4){1,2,3-N3C(o-Ph2P(C6H4))CH}-kappa(2)-P,N}Rh(C8H12)]Cl (19) and [{o-Ph2P(C6H4){1,2,3-N3C(o-Ph2P(C6H4))CH}-kappa(2)-P,N}Ir (C8H12)]Cl (20), respectively, whereas the reaction with [Rh(acac)(CO)(2)] resulted in a pincer complex [{o-Ph2P(C6H4){1,2,3-N3C(o-Ph2P(C6H4))C}-kappa(3)-P, C,P}Rh(CO)] (21). The structures of most of the compounds have been determined by single crystal X-ray analyses. The fused six-membered PCP palladium pincer complex 16 is found to be an excellent catalyst for the Mizoroki-Heck coupling reaction.
机译:双 - 和三 - 膦,5-(二苯基膦基)-1-(2-(二苯基膦基)苯基)三唑类-4-苯基-1H-1,2,3-三唑的合成和过渡金属化学(2) ,5-(二苯基膦基)-4-(2-(二苯基膦基)苯基)-1-苯基-1H-1,2,3-三唑(5),1,4-双(2-(二苯基膦基)苯基)-1H-1-描述了2,3-三唑(6)和5-(二苯基膦基)-1,4-双(2-(二苯基膦基)苯基)-1H-1,2,3-三唑(7)。二膦5和6由于存在至少四个供体原子而显示通用的配位行为。发现5和6组与VI组金属羰基衍生物的反应对反应条件非常敏感。用[M(CO)4(哌啶)2](M = Mo和W)处理后的二膦5,得到P,P和P,N配位复合物[M(共)4(5)] [M = Mo-κB (2)-p,n(8); W-Kappa(2)-p,n(9); Mo-Kappa(2) - P,P(10); W-卡帕(2)-P,P(11)],而6只得到P,N配位络合物[{邻 - Ph2P(C6H4){1,2,3- N3C(邻Ph2P(C6H4))CH} -kappa(2)-p,n} mo(co)(4)](12)和[{o-ph2p(c6h4){1,2,3n(3)c(o-ph2p(c6h4))ch} -kappa(2)-p,n} w(co)(4)](13)。用[m(cod)cl-2](m = pd和pt)的5的反应分别产生κ(2)-p,p chelate络合物14和15,而用[pd(cod)cl -2]在环境温度下,导致形成稀有熔融的六元PCP钳复合物[{O-PH2P(C6H4){1,2,3-N3C(O-PH2P(C6H4))C} -Kappa(3 )-p,c,p} pdcl](16)。在LiHMDS存在下,6与[NiCl 2(DME)]和[Pt(COD)Cl-2]的类似反应产生[{O-PH2P(C6H4){1,2,3-N3C(O-PH2P(C6H4) )C} -Kappa(3)-P,C,P} NiCl](17)和[{O-PH2P(C6H4){1,2,3-N3C(O-PH2P(C6H(4)))C} -kappa(3)-p,c,p} ptcl](18)分别。 6- [m(COD)Cl](2)(2)(M = RH和IR)之间的反应产生阳离子复合物[{O-PH2P(C6H4){1,2,3-N3C(O-PH2P(C6H4))CH } -K​​appa(2)-P,N} RH(C8H12)] Cl(19)和[{O-PH2P(C6H4){1,2,3-N3C(O-PH2P(C6H4))CH} -Kappa( 2)-P,N} IR(C8H12)] Cl(20),与[RH(ACAC)(CO)(2)]反应得到钳子复合物[{O-PH2P(C6H4){1 ,2,3-N3C(O-PH2P(C6H4))C} -Kappa(3)-P,C,P} RH(CO)](21)。大多数化合物的结构已经通过单晶X射线分析确定。熔融的六元PCP钯钳络合物16被发现是Mizoroki-Heck偶联反应的优异催化剂。

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