Sm. Gorun et al., SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF NONPLANAR PERFLUORO PHTHALONITRILES, Journal of fluorine chemistry, 91(1), 1998, pp. 37-40
Perfluoropropene reacts with 1,2-dicyano-3,4,5,6-tetrafluorobenzene to
give the first perfluoroalkyl substituted phthalonitriles. The X-ray
structures of the bis- and tris-substituted products reveal planar, un
distorted rings and head-to-head and head-to-tail preferred conformati
ons for the isopropyl substituents, respectively. As a result, the CF3
groups impart global non-planar character to the new molecules. (C) 1
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