Gas-phase proton affinity and basicity of hydroxybenzophenones

5 p., 4 fig., 1 tab., 1 ap.The gas-phase Proton Affinity (PA) and Basicity (GB) of 2-, 3- and 4-hydroxybenzophenone isomers have been experimentally determined by the Extended Kinetic Cooks Method (EKCM), using ESI-TQ Mass Spectrometry. Our results show that 4-hydroxybenzophenone isomer (PA = 912.6 ± 8.4 kJ·mol) is in the order of 10 kJ·mol more basic than the 2- and 3-hydroxybenzophenones isomers. The results have been rationalized and discussed by means of computational DFT calculations at B3LYP/6-311++G(d,p) level of theory.The support of the Peruvian Scholarship program UNI-agreement No167 - 2015 – Fondecyct-UNI, CONCYTEC (Lima, Perú) is gratefully acknowledged. AFL acknowledges the support from the Brazilian funding agencies CNPq, FAPESP and CAPES