“…We synthesized 4 in three steps from diethyl 2,5-dibromoterephthalate as shown in Scheme S1 (ESI †). 11 In the 1 H NMR spectrum of 4, two sets of signals for the Ha, Hb, and Hc protons of the two diastereomers, i.e., the meso compound (meso-4) and the racemate (rac-4), were observed on the NMR timescale (Fig. S2, ESI †).…”
A structurally constrained, double-helical S,C-bridged tetraphenyl-para-phenylenediamine (TPPD) has been synthesized. The stable radical cation of the S,C-bridged TPPD was generated by chemical oxidation, and the electron spin was found to...
“…We synthesized 4 in three steps from diethyl 2,5-dibromoterephthalate as shown in Scheme S1 (ESI †). 11 In the 1 H NMR spectrum of 4, two sets of signals for the Ha, Hb, and Hc protons of the two diastereomers, i.e., the meso compound (meso-4) and the racemate (rac-4), were observed on the NMR timescale (Fig. S2, ESI †).…”
A structurally constrained, double-helical S,C-bridged tetraphenyl-para-phenylenediamine (TPPD) has been synthesized. The stable radical cation of the S,C-bridged TPPD was generated by chemical oxidation, and the electron spin was found to...
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