Piotr Garczarek, J. Janczak, J. Zoń
Mar 27, 2013
Citations
0
Influential Citations
5
Citations
Journal
Journal of Molecular Structure
Abstract
Abstract A new heterotopic phosphonic acid, 3-amino-5-(dihydroxyphosphoryl)benzoic acid (1) has been synthesized and obtained in the crystalline form. Second multifunctional phosphonic acid – namely 3-(dihydroxyphosphoryl)-5-nitrobenzoic acid (2) has also been obtained, following a different synthetic route than previously reported. Compound 1 crystallizes in a centrosymmetric space group of the triclinic system as monohydrate, C6H3(NH2)(COOH)PO3H2·H2O – 1a. The molecule in the crystal exists in a zwitterionic form, in which one of the proton of the phosphonic group is transferred to the amine group. The zwitterionic molecules interact to each other and with water molecules via N H…O and O H…O hydrogen bonds forming a three-dimensional network.