Abstract
A study of the H+-acetylacetone (acac, HC) and H+–V3+-acetylacetone systems using emf(H) and UV–Vis measurements in 3.0 M KCl ionic medium at 25°C is presented here. As the initial case, the acetylacetone pK a value was determined under similar experimental conditions as reported a few years ago, finding very similar values. Subsequently, in the study of the H+–V3+-acetylacetone system, the stability constants of [VC]2+, [VC2]+, VC3, [OHVC]+, OHVC2, [(OH)2V2C]3+ and [(OH)2V2C2]2+ complexes were determined by emf(H) measurements, and by means of UV–Vis measurements the respective values of [VC]2+, [VC2]+, VC3 and [OHVC]+ species, which are the most abundant in this system. The data analysis was carried out using the NERNST, FONDO, and SPEFO versions of the least-squares program LETAGROP. Some extra-thermodynamic relationships about the stability order of the VII, VIII, and VIV-acetylacetone complexes were obtained by ab initio calculations.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
