119Sn NMR Spectroscopy

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Mitsuo Sawamoto - One of the best experts on this subject based on the ideXlab platform.

  • In-Situ Direct Analysis of the Growing Species by 119Sn NMR Spectroscopy: Living Cationic Polymerization of Isobutyl Vinyl Ether with HCl/SnCl4/nBu4NCl1
    Macromolecules, 1998
    Co-Authors: Hiroshi Katayama, Masami Kamigaito, Mitsuo Sawamoto
    Abstract:

    119Sn NMR Spectroscopy was employed for analysis of the interaction and reaction of SnCl4 with the HCl−IBVE adduct [1; CH3CHCl(OiBu)] in the presence of nBu4NCl in CH2Cl2 solution at −78 °C, which are model reactions for the living cationic polymerization of isobutyl vinyl ether (IBVE). The addition of 1 to an SnCl4 solution led to upfield shifts of the tin nucleus as the 1/SnCl4 mole ratio (

  • in situ direct analysis of the growing species by 119Sn NMR Spectroscopy living cationic polymerization of isobutyl vinyl ether with hcl sncl4 nbu4ncl1
    Macromolecules, 1998
    Co-Authors: Hiroshi Katayama, Masami Kamigaito, Mitsuo Sawamoto
    Abstract:

    119Sn NMR Spectroscopy was employed for analysis of the interaction and reaction of SnCl4 with the HCl−IBVE adduct [1; CH3CHCl(OiBu)] in the presence of nBu4NCl in CH2Cl2 solution at −78 °C, which are model reactions for the living cationic polymerization of isobutyl vinyl ether (IBVE). The addition of 1 to an SnCl4 solution led to upfield shifts of the tin nucleus as the 1/SnCl4 mole ratio (<1) increases, which indicates the formation of SnCl5-, via the interaction between SnCl4 and the chlorine atom in 1. On further addition of 1, the pentacoordinated anion is converted into the hexacoordinated SnCl62-. These tin species are in fast equilibrium among each other, and the 119Sn NMR analyses support the formation of a carbocation [2; CH3CH+(OiBu)] from 1 and the dynamic equilibrium between 1 and 2. More effective chloride-anion donors such as nBu4NCl and Ph3CCl can quantitatively convert SnCl4 into SnCl5-, and then into SnCl62-. Thus under the conditions where living cationic IBVE polymerization proceeds (...

Hiroshi Katayama - One of the best experts on this subject based on the ideXlab platform.

  • In-Situ Direct Analysis of the Growing Species by 119Sn NMR Spectroscopy: Living Cationic Polymerization of Isobutyl Vinyl Ether with HCl/SnCl4/nBu4NCl1
    Macromolecules, 1998
    Co-Authors: Hiroshi Katayama, Masami Kamigaito, Mitsuo Sawamoto
    Abstract:

    119Sn NMR Spectroscopy was employed for analysis of the interaction and reaction of SnCl4 with the HCl−IBVE adduct [1; CH3CHCl(OiBu)] in the presence of nBu4NCl in CH2Cl2 solution at −78 °C, which are model reactions for the living cationic polymerization of isobutyl vinyl ether (IBVE). The addition of 1 to an SnCl4 solution led to upfield shifts of the tin nucleus as the 1/SnCl4 mole ratio (

  • in situ direct analysis of the growing species by 119Sn NMR Spectroscopy living cationic polymerization of isobutyl vinyl ether with hcl sncl4 nbu4ncl1
    Macromolecules, 1998
    Co-Authors: Hiroshi Katayama, Masami Kamigaito, Mitsuo Sawamoto
    Abstract:

    119Sn NMR Spectroscopy was employed for analysis of the interaction and reaction of SnCl4 with the HCl−IBVE adduct [1; CH3CHCl(OiBu)] in the presence of nBu4NCl in CH2Cl2 solution at −78 °C, which are model reactions for the living cationic polymerization of isobutyl vinyl ether (IBVE). The addition of 1 to an SnCl4 solution led to upfield shifts of the tin nucleus as the 1/SnCl4 mole ratio (<1) increases, which indicates the formation of SnCl5-, via the interaction between SnCl4 and the chlorine atom in 1. On further addition of 1, the pentacoordinated anion is converted into the hexacoordinated SnCl62-. These tin species are in fast equilibrium among each other, and the 119Sn NMR analyses support the formation of a carbocation [2; CH3CH+(OiBu)] from 1 and the dynamic equilibrium between 1 and 2. More effective chloride-anion donors such as nBu4NCl and Ph3CCl can quantitatively convert SnCl4 into SnCl5-, and then into SnCl62-. Thus under the conditions where living cationic IBVE polymerization proceeds (...

Josés. Casas - One of the best experts on this subject based on the ideXlab platform.

José Sordo - One of the best experts on this subject based on the ideXlab platform.

Masami Kamigaito - One of the best experts on this subject based on the ideXlab platform.

  • In-Situ Direct Analysis of the Growing Species by 119Sn NMR Spectroscopy: Living Cationic Polymerization of Isobutyl Vinyl Ether with HCl/SnCl4/nBu4NCl1
    Macromolecules, 1998
    Co-Authors: Hiroshi Katayama, Masami Kamigaito, Mitsuo Sawamoto
    Abstract:

    119Sn NMR Spectroscopy was employed for analysis of the interaction and reaction of SnCl4 with the HCl−IBVE adduct [1; CH3CHCl(OiBu)] in the presence of nBu4NCl in CH2Cl2 solution at −78 °C, which are model reactions for the living cationic polymerization of isobutyl vinyl ether (IBVE). The addition of 1 to an SnCl4 solution led to upfield shifts of the tin nucleus as the 1/SnCl4 mole ratio (

  • in situ direct analysis of the growing species by 119Sn NMR Spectroscopy living cationic polymerization of isobutyl vinyl ether with hcl sncl4 nbu4ncl1
    Macromolecules, 1998
    Co-Authors: Hiroshi Katayama, Masami Kamigaito, Mitsuo Sawamoto
    Abstract:

    119Sn NMR Spectroscopy was employed for analysis of the interaction and reaction of SnCl4 with the HCl−IBVE adduct [1; CH3CHCl(OiBu)] in the presence of nBu4NCl in CH2Cl2 solution at −78 °C, which are model reactions for the living cationic polymerization of isobutyl vinyl ether (IBVE). The addition of 1 to an SnCl4 solution led to upfield shifts of the tin nucleus as the 1/SnCl4 mole ratio (<1) increases, which indicates the formation of SnCl5-, via the interaction between SnCl4 and the chlorine atom in 1. On further addition of 1, the pentacoordinated anion is converted into the hexacoordinated SnCl62-. These tin species are in fast equilibrium among each other, and the 119Sn NMR analyses support the formation of a carbocation [2; CH3CH+(OiBu)] from 1 and the dynamic equilibrium between 1 and 2. More effective chloride-anion donors such as nBu4NCl and Ph3CCl can quantitatively convert SnCl4 into SnCl5-, and then into SnCl62-. Thus under the conditions where living cationic IBVE polymerization proceeds (...