
%0 Journal Article
%A Appleton, TG 
%A Hall, JR 
%A Harris, AD 
%A Kimlin, HA 
%A McMahon, IJ 
%T N.M.R. study of acid-base equilibria of aminoalkylphosphonic acids, <sup>+</sup>NH<sub>3</sub>(CH<sub>2</sub>)<sub>n</sub>PO<sub>3</sub>H<sup>-</sup> (n = 1,2,3): Evidence for cyclization in solution
%J Australian Journal of Chemistry
%D 1984/09/01
%V 37
%N 9
%P 1833-1840
%K 
%R https://doi.org/10.1071/CH9841833
%U https://www.publish.csiro.au/paper/CH9841833 
%X The variations with pD of 31P, 13C and lH n.m.r. chemical shifts for D2O solution of MePO3H2 and NH2(CH2)nPO3H2 (n = 1, 2, 3) have been studied. In the aminoalkylphosphonic acids, &#948;p is profoundly affected by amine deprotonation. 'Cyclic' conformations in which the amine group is close to the phosphonate group are proposed, with the strength of the amine-phosphonate interaction decreasing as n increases. 
