SCHEDULED MAINTENANCE
Crystallographic and NMR evidence indicates that the neutral compound (1) has a strong and essentially linear [170(1)°] O–H ⋯ N intramolecular hydrogen bond as part of a seven membered ring, with uniquely short O ⋯ N and H ⋯ N distances of 2.465(5) and 1.32(2)Å and an O–H distance of 1.16(2)Å respectively.
P. Camilleri, C. A. Marby, B. Odell, H. S. Rzepa, R. N. Sheppard, J. J. P. Stewart and D. J. Williams, J. Chem. Soc., Chem. Commun., 1989, 1722 DOI: 10.1039/C39890001722
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