Nishida, Masakazu published the artcileReactions of Highly Branched Perfluoroolefins with (Pentafluorophenyl)trimethylsilane: Characterization of the Unique Structural Properties of Perfluorinated Super-Congested Systems, Computed Properties of 1206-46-8, the publication is Asian Journal of Organic Chemistry (2016), 5(7), 927-937, database is CAplus.
Hexafluoropropene trimers were reacted with C6F5Si(CH3)3 to provide not only pentafluorophenyl but also perfluorophenylene derivatives [F(C6F4)nC9F17; n = 2-9] by successive pentafluorophenylation of perfluoroaryl rings. Their structures, including rotational isomers, were determined by MS, 19F and 13C-{19F} NMR spectroscopy, and/or X-ray crystallog. and were further confirmed by B3LYP-GIAO calculation of NMR shieldings. Formation of a pair of gear-meshed rotamers with clockwise and counterclockwise conformations was identified by NMR measurements for the structures having geminal (CF3)2CF groups at the C=C bond. That the predominantly formed counterclockwise rotamer was gradually converted to the clockwise rotamer over 50 days at room temperature through a synchronized movement of gears was also confirmed by NMR measurements. A comparison between the X-ray structure and B3LYP calculations showed some structural differences that arise from the crystal packing.
Asian Journal of Organic Chemistry published new progress about 1206-46-8. 1206-46-8 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Trimethyl(perfluorophenyl)silane, and the molecular formula is C9H9F5Si, Computed Properties of 1206-46-8.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia