Copolymerization of trans-2,6-diazido-hexaphenylcyclophosphonitrile tetramer with 1,4-bis(diphenylphosphino)butane or 4,4′-bis(diphenylphosphino)biphenyl

Polymers [N(PN)₄(C₆H₅)₆N?P(C₆H₅)₂(CH₂)₄P(C₆H₅)₂]_x and [N(PN)₄(C₆H₅)₆N?P–(C₆H₅)₂C₆H₄C₆H₄P(C₆H₅)₂]_x have been formed by thermal copolymerization of trans-2,6-diazidohexaphenylcyclophosphonitrile [N₃(PN)₄(C₆H₅)₆N₃] with either 1,4-bis-(diphenylphosphino)butane [(C₆H₅)₂P(CH₂)₄P(C₆H₅)₂] or 4,4′-bis(diphenylphosphino)-biphenyl [(C₆H₅)₂C₆H₄C₆H₄P(C₆H₅)₂]. The maximum molecular weights obtained were about 10,000. A polymer endcapped with triphenyl phosphine was stable to 400°C.     

The Syntheses and Crystal Structures of cis-[Bis(diphenylphosphino)methane][1,2-bis(diphenylphosphlno)ethane] dicarbonylmolybdenum(O) and cis-[1,2-Bis(diphenylphosphino)ethane] [cis-1,2-bis(diphenylphosphino) ethylene]dicarbonylmolybdenum(0)

The title compounds, Mo(CO)₂(Ph₂PCH₂PPh₂)(Ph₂PCH₂CH₂PPh₂), Mo(CO)₂(dppm)(dppe) 1, and Mo(CO)₂(Ph₂PCH₂CH₂PPh₂)(Ph₂PCH = CHPPh₂), Mo(CO)₂(dppe)(cis-vpp) 2, were prepared from Mo(CO)₆ and the corresponding bidentate diphosphine ligands in n-decane under nitrogen atomosphere. Crystals of 1 are monoclinic, space group P 2₁/c, with a = 19.072(3), b = 11.348(3), c = 23.57(1) Å, β = 99.64(3)°, Z = 4, and the final residual R(F) = 0.044 for 4810 observed reflections; data of 2 are triclinic, space group P 1, with a = 12.091(3), b = 12.186(8), c = 18.934(5) Å, α = 96.93(4),β = 108.15(2), γ = 107.08(4)deg;, Z = 2, and the final residual R(F) = 0.058 for 4570 observed reflections. The distortion of compound 1 is more pronounced than that of compound 2, The two Mo-P lengths in the same bidentate chelate ligand for both compounds are different. Among them, the two larger Mo-P bond lengths for compound 2 are similar, but significantly different for 1.     

η3-Allyl[1,2-bis(diphenylphosphino)ethan]tricarbonylvanadium(0)-komplexe

The preparation, properties and spectroscopic investigation (IR, ¹H NMR, ³¹P NMR, MS) of η³-allyl[1,2-bis(diphenylphosphino)ethan]tricarbonylvanadium(0) compounds are reported.     

Mechanism of oxidative addition of benzonitriles to DI(1,4-bis(diethylphosphino)butane)nickel(0)

A kinetic study of the oxidative addition of RC₆H₄CN (R = H, m-CN, p-CN) to Ni(DEPB)₂ (DEPB = 1,4-bis(diethylphosphino)butane) suggests a template mechanism leading to the fission of one C---CN bond. The reaction products are trans-planar cyano-organonickel(II) complexes, Ni₂(μ-DEPB)₂(RC₆H₄)₂(CN)₂ and Ni(η¹- DEPB)(RC₆H₄)(CN), in equilibrium. through exchange of DEPB.     

1,4-双(烷基氯硅基)丁烷的合成及反应

利用HCl-AlCl_3对硅—苯键的断裂反应合成了1,4-双(烷基氯硅基)丁烷和1-(二甲基氯硅基)-4-(甲基二氯硅基)丁烷,研究了它们与水、氨(胺)、硫化氢及活泼金属(Li,K-Na,Mg)的反应。通过这些反应合成了十一个在环系中含有Si—A—Si(A=O,NR,S)链节的七员杂环化合物和两个在环系中含有Si—Si(或Si—Si—Si)键的六员(或七员)杂环化合物。