从新的配体双(二苯基膦基)(N -4-(甲硫基)苯基)胺(4,N(PPh 2)2(p- C 6 H 4)SMe)及其单硫化物衍生物(Ph 2 P)N { P(S)Ph 2 }(p- C 6 H 4)SMe(4·S),我们已经制备并表征,包括通过X射线晶体学研究,它们的Ni(II)络合物[NiCl 2 {(Ph 2 P )2 N(p- C 6 H 4)SMe- P,P}](5)和[NiCl 2 {(Ph 2 P)N {P(S)Ph 2 }(p- C 6 H 4)SMe- P,S }](6)。还制备了双硫化物化合物N {P(S)Ph 2 } 2(p- C 6 H 4)SMe(4·S 2)并对其结构进行了表征。计算研究表明,较强的P供体和四元环P,P螯合物的综合影响导致复合物5比热力学更稳定的6,其含有一个弱P═S供体基团,但一个五元P,P═小号螯合环。为了比较,双螯合物[Ni {(Ph 2 P)N
The coordination of two heterofunctional P,P,S ligands of the N-functionalized DPPA-type bearing an alkylthioether or arylthioether N-substituent, (Ph2P)2N(CH2)3SMe (1) and (Ph2P)2N(p-C6H4)SMe (2), respectively, toward cobalt dichloride was investigated to examine the influence of the linker between the PNP nitrogen and the S atoms. The complexes [CoCl2(1)]2 (3) and [CoCl2(2)]2 (4) have been isolated
Mono- and polynuclear Ag(<scp>i</scp>) complexes of N-functionalized bis(diphenylphosphino)amine DPPA-type ligands: synthesis, solid-state structures and reactivity
作者:Alessio Ghisolfi、Christophe Fliedel、Pierre de Frémont、Pierre Braunstein
DOI:10.1039/c6dt04755f
日期:——
DPPA-type ligands (Ph2P)2N(p-Z)C6H4 (Z = H, SMe, OMe) led to Ag(I) complexes of various nuclearities and an unexpected influence of the para-substituent Z is observed, including for CH2Cl2 activation.
Unsymmetrical Chelation of N-Thioether-Functionalized Bis(diphenylphosphino)amine-Type Ligands and Substituent Effects on the Nuclearity of Iron(II) Complexes: Structures, Magnetism, and Bonding
interactions between the iron centers, and it was concluded that 3 behaves as an isolated high-spin Fe(II) mononuclear complex, while significant intra- and intermolecular ferromagnetic interactions were evidenced for 4 at low temperatures. Complexes 3 and 4 were also tested in catalyticethyleneoligomerization but did not exhibit any significant activity under the studied conditions.
Influence of a thioether function in short-bite diphosphine ligands on the nature of their silver complexes: structure of a trinuclear complex and of a coordination polymer
New cationic Ag(I) complexes were prepared by reaction of AgBF4 with two thioether-functionalized bis(diphenylphosphino)amine ligands, Ph2PN(p-ArSMe)PPh2 (L1) and Ph2PN(n-PrSMe)PPh2 (L2), and compared with those obtained from the unfunctionalized ligands Ph2PN(Ph)PPh2 (L3) and Ph2PN(n-Bu)PPh2 (L4), respectively. The complex [Ag3(mu3-Cl)2(mu2-L1-P,P)3](BF4) (1.BF4) contains a triangular array of Ag
Facile and Room-Temperature Activation of C<sub>sp3</sub>–Cl Bonds by Cheap and Air-Stable Nickel(II) Complexes of (<i>N</i>-Thioether) DPPA-Type Ligands
Reaction of the diphosphine (P,P) ligand N(PPh2)(2)(n-PrSMe) (1) or N(PPh2)(2)(p-(SMe)C6H4) (2) with [Ni(NCMe)(6)][BF4](2) in a 2:1 molar ratio afforded the bis-chelated, dicationic Ni(II) complexes [Ni(1)(2)][BF4](2) (3) and [Ni(2)(2)] [BF4](2) (4), respectively. Both complexes were characterized in solution by various spectroscopic techniques and in the solid state by X-ray diffraction studies. In the presence of Zn metal used as cheap reductant, complexes 3 and 4 activate the inert C-Cl bonds of dichloromethane at room temperature to afford in high yield the phosphonium ylide derivatives [Ni((Ph2P)NP(CH2)Ph-2}(n-PrSMe)-P,C)(2)] [BF4] (5) and [Ni((Ph2P)NP(CH2)Ph-2}(p-(SMe)C6H4)-P,C)(2)][BF4](2) (6), respectively. The formation of [Ni((Ph2P)NP(CH2)Ph-2}(nPrSMe)-P,C)(2)]Cl-2 (5'), an analogue of complex 5, from a Ni(0) precursor supports the reduction of the Ni(II) precursors by the Zn reagent prior to C-Cl bond activation. The structures of 5 and 5' were unambiguously established by X-ray diffraction analysis.