Add time:09/07/2019         Source:sciencedirect.com

Boron as [B(OH)4]- reacts in aqueous solution with triols RC(CH2OH)3 (R = CH3, C2H5 or NH2) forming various amounts of mono-chelate, bis-chelate and cage structures which are identified and measured by 13C, 1H and “B NMR spectra. NMR spectra of the products of B(OH)3 with N(CH2CH2OH)3 or N(CH[CH3]CH2OH)3 are also reported and assigned. Triethanolamine borate is shown to hydrolyse via a structure which includes one pendant CH2CH2OH group. Triisopropanolamine borate exists as symmetrical and unsymmetrical diastereomers, the latter being less susceptible to hydrolysis in either acidic or basic media. Copyright © 1996 Elsevier Science Ltd

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