The title molecule in the solid state exists as a cyclic trimer, with B-O(H)-B bridges and a cyclo-hexane-like structure (C2 twist-boat conformation); dissolution in toluene-d8 affords the B(C6F5)2OH monomer, in which the low-temperature 19F NMR data reveal restricted rotation of the OH substituent around the Ar2B-OH bond (Ea = 39 kJ mol-1), as a result of the partial double-bond character of this interaction.
Bis(pentafluorophenyl)borinic acid: A cyclic trimer in the solid state and a monomer, with hindered rotation around the B-OH bond, in solution / T. Beringhelli, G. D'Alfonso, D. Donghi, D. Maggioni, P. Mercandelli, A. Sironi. - In: ORGANOMETALLICS. - ISSN 0276-7333. - 22:8(2003), pp. 1588-1590.
Bis(pentafluorophenyl)borinic acid: A cyclic trimer in the solid state and a monomer, with hindered rotation around the B-OH bond, in solution
T. BeringhelliPrimo
;G. D'AlfonsoSecondo
;D. Donghi;D. Maggioni;P. MercandelliPenultimo
;A. SironiUltimo
2003
Abstract
The title molecule in the solid state exists as a cyclic trimer, with B-O(H)-B bridges and a cyclo-hexane-like structure (C2 twist-boat conformation); dissolution in toluene-d8 affords the B(C6F5)2OH monomer, in which the low-temperature 19F NMR data reveal restricted rotation of the OH substituent around the Ar2B-OH bond (Ea = 39 kJ mol-1), as a result of the partial double-bond character of this interaction.
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