Synthesis of [POCOP]-pincer iron and cobalt complexes via C<sub>sp3</sub>–H activation and catalytic application of iron hydride in hydrosilylation reactions
作者:Shaofeng Huang、Hua Zhao、Xiaoyan Li、Lin Wang、Hongjian Sun
DOI:10.1039/c5ra00072f
日期:——
Csp3–H bond activation in diphosphinito pincer ligand (Ph2PO(o-C6H2-(4,6-tBu2)))2CH2 (1) (POCH2OP) was achieved by Fe(PMe3)4 and CoMe(PMe3)4 to afford complexes (POCHOP)Fe(H) (PMe3)2 (2) and (POCHOP)Co(PMe3)2 (4) under mild conditions. Hydrido iron complex 2 reacted with iodomethane via the elimination of methane to deliver complex (POCHOP)FeI(PMe3) (3). The ligand replacement in Ni(PMe3)4 by 1 gave
Fe(PMe)可实现二膦酸酯钳配体(Ph 2 PO(o -C 6 H 2-(4,6- t Bu 2)))2 CH 2(1)(POCH 2 OP)中的C sp3- H键活化3)4和CoMe(PMe 3)4在温和条件下提供络合物(POCHOP)Fe(H)(PMe 3)2(2)和(POCHOP)Co(PMe 3)2(4)。氢铁络合物2通过消除甲烷与碘甲烷反应生成复合物(POCHOP)FeI(PMe 3)(3)。Ni(PMe 3)4中的配体被1取代,生成了镍(0)络合物(POCH 2 OP)Ni(PMe 3)2(5),而没有C钳3-配体(1)的C sp3- H键活化。证实氢化铁络合物2可以有效地催化醛和酮的氢化硅烷化反应。配合物2–5通过光谱方法和X射线单晶衍射分析进行了表征。
Syntheses and Characterization of Ten-Membered Cyclic and Large Bite Acyclic Bis(phosphines)
作者:Maravanji S. Balakrishna、Rashmishree Panda
DOI:10.1080/10426500307891
日期:2003.6
Reaction of bis(dichlorophosphino)aniline with CH 2 bridged bis(phenols) or substituted diamine gives the 10-membered heterocyclic phosphorochloridities in quantitative yield. The bis(phenols) also react with chlorodiphenylphosphine to afford the bulky acyclic bis(phosphinites).
spectra of [L(2)MCl(2)] [M = Pd, 9; M = Pt, 10] and of the organometallic derived compounds [L(2)Pd(PPh(3))], 11, and [L(2)Pd(Cl)(eta(2)-CH(2)Ph)], 12, consist of a pair of doublets, with the H(endo)() coupled to the P of the metallacycle. The CH(2)-metal close proximity drives the electrophilic metalation of the bridging methylene by RhCl(3) to form [L(2)Rh(Cl)(2)(MeCN)], 13, [L(2) = Ph(2)P(o-C(6)H(
新型二膦参考配体L(2),6,Ph(2)P(oC(6)H(4)CH(2)C(6)H(4)-o)PPh(2)的多步合成已精简,可以在ca上进行制备。20克秤。它与各种金属碎片形成金属环。所得的非常坚硬的船形构象迫使桥接亚甲基的质子(H(endo)())紧靠金属,从而使这些质子(H(endo)(),H(exo )())非对映体。[L(2)MCl(2)]的NMR光谱[M = Pd,9; M = Pt,10]和有机金属衍生化合物[L(2)Pd(PPh(3))],11和[L(2)Pd(Cl)(eta(2)-CH(2)Ph) ],12,由一对双键组成,其中H(endo)()与金属环的P相连。CH(2)-金属紧密接近通过RhCl(3)驱动桥连亚甲基的亲电金属化形成[L(2)Rh(Cl)(2)(MeCN)],13 [L(2)= Ph(2)P(oC(6)H(4)CHC(6)H(4)-o)PPh(2)]。一个