The Protonation of Phloroglucinol and its Ethers: An Exception to the Acidity Function Concept

Quantum-mechanical study of 10-R-9-borabicyclo[3.3.2]decane alkene hydroboration

Density functional theory and correlated ab initio quantum mechanical methods were used to locate and analyze alkene hydroboration transition structures for 10-R-9-borabicyclo[3.3.2]decane reagents. Transition-state ensembles quantitatively modeled enantioselectivity for hydroboration of cis-, trans-, and gem-disubstituted alkenes in excellent agreement with experiment. The 10-R group and borabicyclo[3.3.2]decane ring conformation effects were analyzed to understand the origin of asymmetric selectivity.

NUCLEAR MAGNETIC RESONANCE STUDIES OF THE PROTONATION OF WEAK BASES IN FLUOROSULPHURIC ACID: IV. PHENOLS AND AROMATIC ETHERS

The n.m.r. spectra of phenol, anisole, and other phenols and aromatic ethers in solution in fluorosulphuric acid and in 70% perchloric acid show that in every case they protonate on an aromatic carbon. Earlier evidence from ultraviolet spectroscopy that phenol and anisole protonate on oxygen is reinterpreted.