A novel coordination mode of kappa(1)-N-Br-pyridylbenz-(imida, oxa or othia)-zole to Pt(II): synthesis, characterization, electrochemical and structural analysis
Por:
Nicasio-Collazo, Juan, Ramirez-Garcia, Gonzalo, Flores-Alamo, Marcos, Gutierrez-Granados, Silvia, Peralta-Hernandez, Juan M., Luis Maldonado, Jose, Jimenez-Halla, J. Oscar C., Serrano, Oracio
Publicada:
1 ene 2019
Resumen:
Herein, three novel Pt(II) complexes with formula
[trans-Pt(Br-PyBenz-X)(Cl)(2)(DMSO)] (1-3) having
Br-pyridylbenz-(imida, oxa or othia)-zole (L1-3) derivatives as
potential bidentate ligands, under an unusual kappa(1)-N-coordination
mode are reported. All compounds were obtained straightforwardly via
reaction of corresponding LPB1-3 and [Pt(Cl)(2)(DMSO)(2)] (DMSO =
dimethyl sulfoxide), at 100 degrees C in acetonitrile, respectively. 1-3
complexes were characterized by analytical and spectroscopic data:
melting point, FT-IR, Raman, UV/Vis and NMR experiments. Cyclic
voltammetry studies show an irreversible two-electron process at -0.50
and -0.51 V, which was ascribed to the Pt(II)/Pt(IV) couple, for
complexes 2 and 3. The crystal structure of complex 2 was elucidated by
single-crystal X-ray diffraction, where the platinum atom exhibits a
square plane geometry, where L-PB2 adopts an unusual mono-coordinated
mode via an N-kappa(1)-benzoxazole ring. According to DFT calculations
the first N-coordination exchanging one DMSO molecule is favourable,
while the second N-coordination is highly impeded.
Filiaciones:
Nicasio-Collazo, Juan:
Univ Guanajuato, Dept Quim, Cerro Venada S-N, Guanajuato 36040, Gto, Mexico
Ctr Invest Opt, Res Grp Opt Properties Mat GPOM, AP 37000, Guanajuato, Mexico
Departamento de Química, Universidad de Guanajuato, Cerro de La Venada S/N, Guanajuato Gto, CP 36040, Mexico
Research Group of Optical Properties of Materials (GPOM), Centro de Investigaciones en Óptica, León Guanajuato, AP 37000, Mexico
Ramirez-Garcia, Gonzalo:
Univ Guanajuato, Dept Quim, Cerro Venada S-N, Guanajuato 36040, Gto, Mexico
Departamento de Química, Universidad de Guanajuato, Cerro de La Venada S/N, Guanajuato Gto, CP 36040, Mexico
Flores-Alamo, Marcos:
Univ Nacl Autonoma Mexico, Fac Quim, Circuito Exterior S-N,Cd Univ, Mexico City 04510, DF, Mexico
Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Circuito Exterior S/N, Coyoacán, Cd. Universitaria, Ciudad de México, CP 04510, Mexico
Gutierrez-Granados, Silvia:
Univ Guanajuato, Dept Quim, Cerro Venada S-N, Guanajuato 36040, Gto, Mexico
Departamento de Química, Universidad de Guanajuato, Cerro de La Venada S/N, Guanajuato Gto, CP 36040, Mexico
Peralta-Hernandez, Juan M.:
Univ Guanajuato, Dept Quim, Cerro Venada S-N, Guanajuato 36040, Gto, Mexico
Departamento de Química, Universidad de Guanajuato, Cerro de La Venada S/N, Guanajuato Gto, CP 36040, Mexico
Luis Maldonado, Jose:
Ctr Invest Opt, Res Grp Opt Properties Mat GPOM, AP 37000, Guanajuato, Mexico
Jimenez-Halla, J. Oscar C.:
Univ Guanajuato, Dept Quim, Cerro Venada S-N, Guanajuato 36040, Gto, Mexico
Serrano, Oracio:
Univ Guanajuato, Dept Quim, Cerro Venada S-N, Guanajuato 36040, Gto, Mexico
Departamento de Química, Universidad de Guanajuato, Cerro de La Venada S/N, Guanajuato Gto, CP 36040, Mexico
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