Oka, Hiroyuki published the artcileSynthesis and characterization of poly(1,3-phenylene)-based polyradical carrying cyclic nitroxides observation of ferromagnetic interaction, HPLC of Formula: 111865-47-5, the publication is Polymer Journal (Tokyo) (1999), 31(11-1), 979-982, database is CAplus.
A poly(1,3-phenylene) containing cyclic nitroxide radicals which are planar in most cases, favoring extensive delocalization of unpaired electrons over the whole of radical mol. was prepared and the magnetic properties were studied. The radical containing polyphenylene was prepared by Pd-catalyzed cross-coupling of 6,8-Dibromo-2,2,4,4-tetramethyl-1H,2H,4H-3,1-benzoxazine and 2,2′-(1,3-phenylene)bis-1,3,2-Dioxaborinane, in the presence of Bu4NCl and K2CO3 under N; the intermediate was oxidized by 3-chloroperoxybenzoic acid to generate the polyradical. The spin concentration of the polyradical determined by ESR was 1.61 x 1021 spins/g, corresponding to 0.75 spin per repeating unit. Spin concentration was constant in the solid state for a long time at room temperature A clear absorption peak due to the AMs = 2 forbidden transition was observed at 5.5-60 K. The signal intensity vs. T-1 plots gives a linear relationship, indicating that the polyradical is in part at least in a triplet ground state (or both the triplet and singlet are nearly degenerated). The intramol. magnetic interaction through the n-conjugation is thus ferromagnetic.
Polymer Journal (Tokyo) published new progress about 111865-47-5. 111865-47-5 belongs to bromides-buliding-blocks, auxiliary class Benzenes, name is Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, and the molecular formula is C10H16Br3N, HPLC of Formula: 111865-47-5.
Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary