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Jean-François Pilichowski Myriam Morel Farba Tamboura Stefan Chmela Jacques Lacoste 《Polymer Degradation and Stability》2010,95(9):1575-4515
4-13C-isoprene was prepared by the Wittig reaction. All reaction steps were optimised using unlabelled compounds. By reaction with triphenyl phosphine, 13C labelled methyl iodide afforded labelled methyl-triphenyl phosphine iodide in 84% yield. This reacted with meth acrolein with production of 4-13C-isoprene in 64% yield. Labelled polyisoprene was prepared by anionic polymerisation initiated by t-butyl lithium. Based on 13CH3I the overall yield is ca 30%. The polymer was characterized by 1H and 13C NMR spectroscopy. The contribution of each microstructure was [cis 1-4, 72%]; [trans 1-4, 10%]; [3-4, 18%]. 相似文献
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Tamboura Farba Bouyagui Gaye Mohamed Nedelec Jean Marie Mentre Olivier 《Journal of chemical crystallography》2008,38(6):471-474
Abstract The copper complex [Cu(C23H27Br2N4O2)(H2O)(NO3)]2 was synthesized and characterized by X-ray diffraction. The complex crystallizes in the triclinic system with space group
P-1, lattice parameters: a = 13.2293(18) (?), b = 14.184(20) (?), c = 16.522(23) (?), α = 91.923(2)°, β = 111.777(2)°, γ = 111.259(2)°, V = 2632.0(6) ?3, Z = 4, D
c
= 0.88 Mg m−3. In the title compound [Cu(C23H27Br2N4O2)(H2O)(NO3)]2, the coordination polyhedron of the Cu atom is a square-planar environment. The structure consists of mononuclear units in
which the copper(II) ions are linked in the plane by N, N′ iminato and O, O′ phenoxo atoms. In addition the crystal lattice
contains one water molecule per unit.
Graphical Abstract Dissymmetric ligand was efficiently synthesized and used to prepfsare a copper(II) complex which was characterized by X-ray
diffraction
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