Study of the possibility of isomorphic substitution of halogens and pseudohalogens groups in the ortho- and para- position of benzoic acid

Abstract

The present paper contains the elaboration of the thermic analysis of 22 binary systems, between benzoic, halogenbenzoic and pseudohalogenbenzoic acíds which were all determined by the "thaw-melting" method. Binary systems studied: 1) o-fluorobenzoic ac. + benzoic ac. Mixed crystals V; 2) o-chlorobenzoic ac. + o-fluorobenzoic ac. Mixed crystals III; 3) o-fluorobenzoíc ac. + o-bromobenzoic ac. Mixed crystals V; 4) o-fluorobenzoic ac. + o-iodobenzoic ac. Eutetic; 5) o-fluorobenzoic ac. + o hydroxybenzoic ac. Mixed crystals IV; 6) o-fluorobenzoic ac, + o-methylbenzoic ac. Compound 1: 1; 7) o-fluorobenzoic ac. + o-aminobenzoic ac. Eutetic; 8) benzoic ac. + o-aminobenzoic ac. Eutetic; 9) o-chlorobenzoic ac. + o-aminobenzoic ac. Eutetic; 10) o-bromobenzoic ac. + o-aminobenzoic ac. Eutetic; 11) o-iodobenzoic ac. + o aminobenzoic ac. Eutetic; 12) o-hydroxybenzoic ac. + o-aminobenzoic ac. Compound 1:1;  13) o-methylbenzoic ac. + o-aminobenzoic ac, Eutetic; 14) o-methylbenzoic ac. + o-hydroxybenzoic ac. Eutetic; 15) benzoic ac. + o-methylbenzoic ac. Mixed crystals V;16) benzoic ac. + p-fluorobenzoic ac. Mixed crvstals I; 17) p-fluorobenzoic ac. + p-hydroxybenzoic ac. Eutetic; 18) p-fluorobenzoic ac. + p-methylbenzoic ac. Eutetic; 19) p-fluorobenzoic ac. + p-aminobenzoic ac. Eutetic; 20) benzoic ac. + p-aminobenzoic ac. Eutetic; 21) p-hydroxybenzoic ac. + p-aminobenzoic ac. Eutetic; 22) p-methylbenzoic ac. + p-aminobenzoic ac. Eutetic.