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Investigadores :

Página personal del Dr.Q. Oscar Ventura


http://www.rau.edu.uy/pedeciba/personas/ventura.htm

El Dr. Oscar Ventura es investigador Grado 5 en el Area Química del PEDECIBA. Ingresó al Programa en 1987. Desempeña sus actividades en la Cátedra de Química Cuántica, Facultad de Química.

http://bilbo.edu.uy/MTC-Labs

Línea de investigación:
Determinación de estructura y reactividad de complejos de enlace de hidrógeno en

  • haces moleculares supersónicos (dímeros)
  • fase gaseosa (clusters)
  • fase condensada (líquidos y polímeros)
  • en sistemas de interés fisicoquímico (He22, H2O, HF, HF, etc.)
  • de interés en química orgánica (isomerización, adición nucleofílica y electrofílica transferencia protónica)
  • de química macromolecular ("host-guest chemistry")

Dirección postal:
Cátedra de Química Cuántica
Facultad de Química
Universidad de la República
Av. Gral. Flores 2124
Montevideo 11800
Uruguay
tel: (+598-2) 948396
fax: (+598-2) 941906
e-mail :onv@fq.edu.uy



Publicaciones


  • Ventura O, Cubas ML,
    A conformational study of the hemimercaptal of methylglyoxal and glutathione including the study of solvent effects
    J Braz Chem Soc, 2-3: 210-216 (1991)

  • Coitiño L, Ventura O, Sosa R
    Comparison of semiempirical methods in the determination of the structure of hydrogen bonded complexes of NH3 and H2O.
    J Mol Struct (Teochem) (1991)

  • Sosa R, Ventura O, Irving K
    Ab initio characterization of possible dissociation pathways for multiphoton ionization of the water dimer in supersonics free jets
    J Mol Struct (Theochem), 86: 315-328 (1992)

  • Ventura O, Cubas ML
    A semi-empirical study of the reaction of the hemimercaptal of methylglyoxal and glutathione at the active center of Glyoxalase I
    Int J Quantum Chem, 44: 699-722 (1992)

  • Ventura O, Lledos A, Coitiño E, Bertran J,
    Analysis of the gas phase addition of water to formaldehyde. A semiempirical and ab initio study of bifunctional catalysis by H2O
    J Comput Chem, 13: 1037-1046 (1992)

  • Coitiño E, Sosa R, Ventura O
    Comprative ab initio and semiempirical study of hydrogen-bonded complexes of NH3 and H2O
    J Mol Struct (Theochem), 86: 453-463 (1992)

  • Ventura O
    Chemical reactivity
    In: Structure, Interactions and Reactivity, S. Fraga (Ed.), Elsevier Pub. Co., pp. 600-636 (1992)

  • Turi L, Rama J, Dannemberg J, Ventura O
    Molecular orbital study of the structures of hydroxamic acids
    J Phys Chem, 96: 3709-3714 (1992)

  • Coitiño E, Lledos A, Serra R, Ventura O
    Ab initio study of structure and reactivity of H2CO.H2O+ and related radical cations
    J Am Chem Soc, 115: 9121-9126 (1993)

  • Ventura O, Rama J, Turi L, Dannemberg J
    Acidity of hydroxamic acids: an ab initio and semiempirical study
    J Am Chem Soc, 115: 5754 (1993)

  • Vila F, Ventura O, Varela J, Longo E
    An AM1 semiempirical study of the mechanism of sintering for ZnO in the presence of water and carbon dioxide
    J Mol Struct (Theochem), 305: 175-184 (1993)

  • Pereira A, Coitiño E, Ventura O
    Comparative ab initio study of the structure of the H2CO. H20+ and H2CO.HF+ radical cations
    J Mol Struct (Theochem) (1993)

  • Coitiño E, Ventura O
    Isomerization of the formaldehyde radical cation and the failure of MP2
    Chem Phys Lett, 202: 479-482 (1993)

  • Karwowski J, Bancewicz M, Ventura O
    Moments of energy level distributions in vibrational spectra
    J Phys A, 20: 5581 (1993)

  • Sosa R, Gardiol P, Ventura O
    Multi-reference Cl calculation of the potential energy curves for the water monomer and dimer
    J Mol Struct (Theochem), 297: 337-345 (1993)

  • Coitiño E, Tomasi J, Ventura O
    On the importance of water in the aldol condensation reactions of acetaldehyde
    J Chem Soc Faraday T (1993)

  • Pereira A, Coitiño E, Ventura O
    Ab initio
    study of the structure of radical cations derived from H-bonded complexes: a comparison between [H2CO.H2O]+ and [H2CO.HF]+
    J Mol Struct (Teochem), 314: 31 (1994)

  • Ventura O, Latajka Z, Ratajzack H, Irving K
    On the dimerization shift of the OH-stretching fundamentals of the water dimer
    Chem Phys Lett, 217: 436 (1994)

  • Ventura O, Ferreira E, Gardiol P, Sosa R
    Ab initio MP2, MCSCF and MR-SDCI study on the structure of O4 and comparison with the hypervalent CO3 and SO3 species
    J Mol Struct (Theochem) (1995)

  • Coitiño E, Pereira A, Ventura O
    High level ab initio prediction of the structure and IR spectra of formaldehyde-water radical-cation complexes
    J Chem Phys, 102: 2833 (1995)

  • Ventura O, Rama J, Turi L, Dannenberg J
    The gas-phase structure and acidity of formohydroxamic acid and formamide: a comparative ab initio study
    J Phys Chem, 99: 131 (1995)

  • Ventura O, Kieninger M, Coitiño E
    Density functional study of the isomerization of fluoro-and chloroformaldehyde radical cations
    J Comput Chem, 17: 1309 (1996)

  • Ventura O
    Transition states for H-radical reactions: LiFH as a stringent test case for density functional methods
    Mol. Phys., 89: 1851 (1996)

  • Kremer E, Gancheff J, Kremer C, Mombrú A, Suescun L, González O, Mariezcurrena R, Cubas ML, Ventura O
    Structural and conformational analysis of Tc(V) and Re(V) dioxo complexes. X-ray crystal structure of [TcO2(tn)2].H2O
    Polyhedron, 16: 3311-3316 (1997)

  • Gambino D, Kremer E, Baran EJ, Mombrú A, Suescun L, Mariezcurrena R, Kieninger M,Ventura O
    Synthesis, characterization and crystal structure of [ReO(Me4tu)4](PF6)3
    Z Anorg Allg Chem, 625: 1-7 (1999)