Browsing by Author "IBANEZ, F"
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- ItemHYDROLYSIS OF TRIS(1,10-PHENANTHROLINE)IRON(II) COMPLEX IN 1,4-DIOXANE WATER MIXTURES(1986) CAZANGA, M; SANTOS, JG; IBANEZ, F
- ItemKINETIC-STUDIES ON THE REACTION OF TRIETHYLPHENYL-PHOSPHINE AND DIETHYLPHENYL-PHOSPHINE WITH CARBON-DISULFIDE IN NITRILE SOLUTIONS(1986) CAMPINO, T; SANTOS, JG; IBANEZ, F
- ItemRADICAL SCAVENGING IN THE SONOLYSIS OF AQUEOUS-SOLUTIONS OF I-, BR-, AND N3-(AMER CHEMICAL SOC, 1991) GUTIERREZ, M; HENGLEIN, A; IBANEZ, FIodide and bromide solutions are sonolyzed under pH conditions, where reactions of the products, i.e. hydrogen peroxide and iodine (or bromine), do not occur. The total yield of the products as well as the hydrogen yield is independent of solute concentration. The results are understood in terms of the competition of the OH + OH and the OH + solute reactions. A local concentration of 4 x 10(-3) M of the OH radicals in an interfacial region between the cavitation bubbles and the liquid is derived from the data obtained. The sonolysis of azide solutions is also investigated. The main product is nitrogen, which is formed in the reaction of N3- with OH radicals in the millimolar concentration range. At higher azide concentrations, additional nitrogen is formed as hydrogen atoms are also scavenged. Ammonia and hydrazine are minor products of the N3- sonolysis.
- ItemREACTIVITY STUDIES ON THE HYDROLYSIS OF IRON(II) COMPLEXES OF SUBSTITUTED PHENANTHROLINES IN DIOXANE WATER SOLVENTS(1989) IBANEZ, F; SANTOS, JG; FRANCOIS, MA; GALLARDO, S
- ItemSOLVENT EFFECTS ON THE REACTION OF TRIETHYLPHOSPHINE WITH CARBON-DISULFIDE(1984) IBANEZ, F; SANTOS, JG
- ItemSOLVENT EFFECTS UPON THE N-H VIBRATIONAL FREQUENCIES OF PHOSPHORAMIDES(1982) IBANEZ, F; PENA, JThe effect of various solvents upon the N-H vibrational frequencies of phosphoryl trisanilide (PTA), thiophosphoryl trisanilide (TTA), phosphoryl triscyclohexylamide (PTC) and thiophosphoryl triscyclohexylamide (TTC) was measured. The solvent shifts for the different amides are correlated and there is also some correlation between solvent shifts and Gutmann''s solvent donicities. For the calculation of the solvent shifts a better linear relation is obtained through an equation of 3 terms which takes into account the donicity, the acceptor number, the dipole moment and the relative permittivity of the solvent. The last term considers the interaction of the solvent dipole moment with the induced dipole on the N-H bond. These correlations are discussed.