119Sn NMR Spectroscopy - Explore the Science & Experts | ideXlab

Scan Science and Technology

Contact Leading Edge Experts & Companies

119Sn NMR Spectroscopy

The Experts below are selected from a list of 4017 Experts worldwide ranked by ideXlab platform

119Sn NMR Spectroscopy – Free Register to Access Experts & Abstracts

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.

  • Triphenyltin derivatives of sulfanylcarboxylic esters.
    Journal of inorganic biochemistry, 2017
    Co-Authors: Josés. Casas, José Sordo, Agustín Sánchez, María D. Couce, Rafael Seoane, Antonio Perez-estévez, Ezequiel M. Vázquez-lópez

    Abstract:

    The reaction of 3-(aryl)-2-sulfanylpropenoic acids [H2xspa; x: p=3-phenyl-, f=3-(2-furyl)-, t=3-(2-thienyl)-] with methanol or ethanol gave the corresponding methyl (Hxspme) or ethyl (Hxspee) esters. The reaction of these esters (HL) with triphenyltin(IV) hydroxide gave compounds of the type [SnPh3L], which were isolated and characterized as solids by elemental analysis, IR Spectroscopy and mass spectrometry and in solution by multinuclear (1H, 13C and 119Sn) NMR Spectroscopy. The structures of [SnPh3(pspme)], [SnPh3(fspme)] and [SnPh3(fspee)] were determined by X-ray diffractometry and the antimicrobial activity against E. coli, S. aureus, B. subtilis, P. aeruginosa, Resistant P. aeruginosa (a strain resistant to ‘carbapenem’), and C. albicans was tested and the in vitro cytotoxic activity against the HeLa-229, A2780 and A2780cis cell lines was determined for all compounds.

  • Synthesis, characterization and antibacterial activity of 3‐(2‐methoxyphenyl)‐2‐sulfanylpropenoic acid and di‐isopropylammonium [3‐(2‐methoxyphenyl)‐2‐sulfanylpropenoato] triphenylstannate(IV). The crystal structure of [HQ][SnPh3(o‐mpspa)]
    Applied Organometallic Chemistry, 2006
    Co-Authors: Pedro Álvarez-boo, Josés. Casas, Eduardo E. Castellano, M. Delfina Couce, Rosa Farto, Eduardo Freijanes, José Sordo

    Abstract:

    Reaction of 3-(2-methoxyphenyl)-2-sulfanylpropenoic acid [H2(o-mpspa)] with SnPh3OH in the presence of di-isopropylamine resulted in the formation of the complex [HQ][SnPh3(o-mpspa)] (where HQ = di-isopropylammonium cation and o-mpspa = 3-(2-methoxyphenyl)-2-sulfanylpropenoato), which was characterized by mass spectrometry and vibrational Spectroscopy, as well as by 1H, 13C and 119Sn NMR Spectroscopy. The single-crystal X-ray structural analysis of the new complex shows a trigonal-bipyramidal coordination geometry around the Sn atom where o-mpspa behaves as a bidentate chelating ligand. Dimeric units arise from the existence of NH…O hydrogen bonds between the NH2 group of the di-isopropylammonium cation and the oxygen atoms of the two neighbouring carboxylato groups. The bacteriostatic activity of the complex is also reported. Copyright © 2007 John Wiley & Sons, Ltd.

  • Diorganotin(IV) complexes of dideprotonated pyridoxine (PN, vitamin B6). The crystal structures of [SnEt2(PN–2H)] · CH3OH, [SnEt2(PN–2H)(DMSO)] and [SnBu2(PN–2H)]
    Journal of Organometallic Chemistry, 2004
    Co-Authors: Josés. Casas, Umberto Russo, José Sordo, Agustín Sánchez, Alfonso Castiñeiras, Félix Condori, María D. Couce, José M. Varela, Ezequiel M. Vázquez-lópez

    Abstract:

    Abstract The reactions of dimethyl-, diethyl- and dibutyltin(IV) oxides with pyridoxine (PN) in toluene/ethanol led to the formation of compounds [SnR2(PN–2H)] which were characterized by EI and FAB mass spectrometry and by IR, Raman, Mossbauer and 1H, 13C and 119Sn NMR Spectroscopy. The structures of [SnEt2(PN–2H)] · CH3OH, [SnBu2(PN–2H)] and [SnEt2(PN–2H)(DMSO)] were determined by X-ray diffractometry. The first two contain dimeric [SnR2(PN–2H)]2 units in which two bridging-chelating pyridoxinate anions link the Sn atoms, while in [SnEt2(PN–2H)(DMSO)] the DMSO coordinates to the tin atom via its O atom in a similar dimeric unit.