“…The mononuclear structure A (Chart 1) was proposed, with significant intramolecular O-H … F 1 -C bonding causing slow rotation of the proximal CF 3 group at 296 uC, although the expected J( 1 H-19 F) coupling to F 1 was not observed. 7 A similar behavior was found for HOC(CF 3 ) 2 (2,4,6-C 6 H 2 (CF 3 ) 3 ), 8 showing that the ring substituent in para (Si(i-Pr) 3 or CF 3 ) position has no influence, whether electronic or steric, on the substituents that could be involved in H-bonding.…”