Octafluoronaphthalene-1,8-diaminonaphthalene (1/1)

The structure of C10H10N2.C10F8, (I), comprises mixed stacks of parallel (w ithin 2 degrees) neutral molecules, overlapping in a 'graphitic' mode. Mole cular geometry and UV-visible spectra indicate the absence of charge transf er. Structure (I) in space group P2(1) is close to P2(1)/c and pseudo-isost ructural with the 1:1 complex of naphthalene and C10F8, hence the crystal p acking of (I) is governed largely by quadrupole-quadrupole interactions, hy drogen bonding of NH2 groups (including a relatively strong N-H . . .F bond of 2.16 Angstrom) being less important.