Very strong hydrogen bonds formed between carboxylic acids and anions: trifluoroacetic and acetic acids with acetates and fluoride
Abstract
Studies on very strong H bonds have been extended to the strongest carboxylic acid CF3CO2H and its anion. The H bonds CF3CO2–⋯ H–OAc (AC = MeCO), –F ⋯ H–O2CCF3, and CF3CO2–⋯ H–O2CCF3 have been studied in detail by both p.m.r. and i.r. spectroscopy and δ(OH)H, Kc, Δν(O–H), ΔH0, ΔG0, and ΔS0 values obtained.