Quantitativestructure-stabilityrelationships (QSSRs) are formulated for the inclusioncomplexation of 17 barbituricacidderivatives with alpha- and beta-cyclodextrin. The variation in the complex stability constants K alpha and K beta is found to be partly accounted for by the molar refractivity or the hydrophobicity of the substituent R1 at position 5 of the barbiturate ring. In addition, K alpha
The Hydrolytic Rate of Barbituric Acid and the Extrathermodynamic Relationship
作者:Shozo Asada、Midori Yamamoto、Jujiro Nishijo
DOI:10.1246/bcsj.53.3017
日期:1980.10
The enthalpy-entropy relationship of activation was subjected to discussion in connection with the alkaline hydrolysis of 10 barbituric acids. The extrathermodynamic linear equation was derived by using several parameters; the dissociation constant (pK), the 13C shift value [δc(5)] at the 5-position of the ring, and/ or the molecular connectivity index (χ).