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Kolekcje
Inne
Solid state and solution behaviour of N-(2-pyridyl)- and N-(4-methyl-2-pyridyl)aminomethane-1,1-diphosphonic acids.
Autorzy
Rok wydania
2006
Czasopismo
Journal of Molecular Structure
Numer woluminu
782
Strony
81-93
DOI
10.1016/j.molstruc.2005.07.004
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The crystal structures of N-(2-pyridyl)aminomethane-1,1-diphosphonic acid (1) and N-(4-methyl-2-pyridyl)aminomethane-1,1-diphosphonic acid (2) are determined and discussed with respect to their geometry and solid state organization. Compounds 1 and 2 crystallize as the opposite E and Z isomers. However, in solution both appear as a mixture of the Z and E forms. From the temperature dependence of NMR spectra, the Z/E ratio is assigned to be nearly equal in 1 and 0.69:0.31, respectively, in 2. The role of a substituent position on the pyridyl ring for the Z/E ratio in solution and for solid state conformations of N-(2-pyridyl)aminomethane-1,1-diphosphonic acids is discussed as well.
Słowa kluczowe
Bisphosphonates, Self-assembly, Hydrogen bonds, X-ray diffraction, Dynamic NMR spectroscopy
Adres publiczny
https://doi.org/10.1016/j.molstruc.2005.07.004
Strona internetowa wydawcy
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