CRYSTALLOGRAPHIC STUDIES ON STERICALLY AFFECTED CHEMICAL-SPECIES .2. MOLECULAR AND CRYSTAL-STRUCTURE OF 1,8-BIS(DIMETHYLAMINO)-NAPHTHALENE TETRAFLUOROBORATE - ANALYSIS OF DISTORTION OF GEOMETRY IN THE AROMATIC PART DUE TO INTRAMOLECULAR HYDROGEN-BONDING

The crystal and molecular structures of 1,8-bis (dimethylamino) naphthalene tetrafluoroborate have been determined by X-ray diffraction. The compound crystallizes in the triclinic system, space group P1, with a=8.073(1), b=8.1200(1), c=12.256(1)Å, α=92.25(1)°, β=106.23(1)° and γ=79.23(1)°. The structure has been solved by direct methods and refined to R=0.06 for 2370 reflections. Strong intramolecular H-bonding causes out-of -plane deformations in the region of peri substituents and very strong in-plane deformations of the valence angles at carbons C1, C8 and C9. The H position is symmetrical and the N⋯N distance is 2.562 Å. © 1990.