The title molecule, C10H8F6N4, has been characterized crystallographic
ally, thus establishing its isomeric form. This form has a C=N-N=C sub
structure with a torsion angle of 145 (1)-degrees about the N-N bond.
There is an extensive hydrogen-bonding system, such that each molecule
is doubly bonded to each of two neighbours, related to the first by d
ifferent twofold axes.