Salts of Phosphonic Acid Derivatives: Illustrative Examples of Solid State NMR Spectroscopy
نویسندگان
چکیده
High-resolution solid state 13C, 23Na and 31P NM R data have been obtained for the acid form and for several salts o f the phosphonic acids: ethane-1 ,2 -diphosphonic acid, ethane-l-hydroxy1.1-diphosphonic acid (H E D P ), and 3-am ino-l-hydroxypropane-l,l-diphosphonic acid. The data provide evidence by which sample purity and crystallinity may be examined and from which the size of the asymmetric unit may be determined. In the case of the sodium salts of ethane1.2-diphosphonic acid, the 3IP and _3Na spectra provide evidence of possible motion or bond fluctionality for the phosphonic acid group.
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