Synthesis and supramolecularity of non-centrosymmetric proton transfer compound 2-aminopyridinum picolinoate

Abstract EN

The proton-transfer compound 1 was prepared by mixing equimolar amounts of picolinic acid with 2-aminopyridine.

Its crystal structure was determined by single-crystal X-ray diffraction.

Compound 1 was ionic, with proton transfer occurring to the aromatic nitrogen of the 2- amino pyridine moiety.

Supramolecular synthons including different motifs of hydrogen bonding, ion-pairing interactions, and non-Centro symmetric heteromer existed in the crystal structure were carefully investigated and presented in term of crystal engineering and host-guest chemistry.

Compound 1 crystallizes in the space group P2 (1) / n of the monoclinic system with unit cell parameters of: a = 8.7714(12) Å, b = 12.1579 (17) Å, c = 10.8546(15) Å, with α = 90o, β =110.100(4) o, and γ = 90o.