. Author manuscript; available in PMC: 2009 Mar 30.

Published in final edited form as: J Am Chem Soc. 2008 Mar 12;130(13):4212–4213. doi: 10.1021/ja7101218

Table 1.

J Couplings of ¹³C1 and the Protons in Positions 2 and 3 in 1-¹³C-succinic Acid; the Site Labels Are in Figure 1

pH	2J_CH (Hz)	3J_CH (Hz)	3J_HaHc (Hz)	3J_HaHb (Hz)
1.80	−7.15	5.84	5.43	7.45
2.10	−7.16	5.83	5.42	7.56
2.95	−7.15	5.82	5.62	7.41
4.31	−6.80	5.47	6.07	7.35
5.66	−6.41	4.48	7.55	7.17
8.68	−6.61	4.20	8.69	6.62
13.3	−6.32	4.13	8.51	6.68