The species resulting from the addition of benzene to HF SbF 5 (Exercise 15 24) shows the following 13 C NMR absorptions 52 2(CH 2 ), 136 9(CH), 178 1(CH), and 186 6(CH) ppm The signals at 136 9 and 186 6 are twice the intensity of the other peaks Assign this spectrum Exercise 15 24 Professor G Ola...

From the 1H NMR data in Exercise 1524 we can deduce that the species resulting from the addition of ...

The species resulting from the addition of benzene to HF SbF 5 (Exercise 15-24) shows the

Question:

The species resulting from the addition of benzene to HF – SbF₅ (Exercise 15-24) shows the following ¹³C NMR absorptions: δ = 52.2(CH₂), 136.9(CH), 178.1(CH), and 186.6(CH) ppm. The signals at δ = 136.9 and δ = 186.6 are twice the intensity of the other peaks. Assign this spectrum.

Exercise 15-24

Professor G. Olah* and his colleagues exposed benzene to the especially strong acid system HF – SbF₅ in an NMR tube and observed a new ¹H NMR spectrum with absorptions at δ = 5.69 (2 H), 8.22 (2 H), 9.42 (1 H), and 9.58 (2 H) ppm. Propose a structure for this species.

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