{'fraction_non_alphanumeric': 0.02404809619238477, 'fraction_numerical': 0.002004008016032064, 'mean_word_length': 4.747126436781609, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Analysis of nuclear magnetic resonance spectra of phthalic acid and its diesters

The n.m.r. spectra of benzene ring protons of phthalic acid, phthalic anhydride, dimethylphthalate, and diethylphthalate were analyzed by means of LAOCN 3 computer programme. The results of analysis were compared with those obtained by direct method. For the given series of compounds it was found that the coupling constants JAA' and J B B ' change whereas the constants JAB and J A B ' remain practically unchanged.