
%0 Journal Article
%A Sandow, Melissa 
%A Easton, Christopher J. 
%A Lincoln, Stephen F. 
%T Metallocyclodextrins of 6<emph type="7">A</emph>-(2-Aminoethylamino)-6<emph type="7">A</emph>-deoxy-&szlig;-cyclodextrin: Their Formation and Complexation of (<emph type="2">R</emph>)- and (<emph type="2">S</emph>)-Tryptophanate in Aqueous Solution
%J Australian Journal of Chemistry
%D 2000/03/14
%V 52
%N 12
%P 1151-1155
%K 
%R https://doi.org/10.1071/CH99101
%U https://www.publish.csiro.au/paper/CH99101 
%X The binary metallocyclodextrins formed by 6A-(2-aminoethylamino)-6A-deoxy-&#946;-cyclodextrin (&#91;M(&#946;CDen)&#93;2+ where M2+ = Co2+ , Ni2+ , Cu2+ and Zn2+) are characterized by log(K/dm3 mol&#8211;1) = 12.000.05, 7.810.01, 8.370.03 and 8.520.07, respectively, in aqueous solution at 298.2 K and I = 0.10 mol dm&#8211;3 (NaClO4), where K is the stability constant. The ternary metallocyclodextrins formed by &#91;M(&#946;CDen)&#93;2+ and (R)- and (S)-tryptophanate, &#91;M(&#946;CDen)(R)-Trp&#93;+ and &#91;M(&#946;CDen)(S)-Trp&#93;+ , are characterized by log(K/dm3 mol&#8211;1) = 8.710.06 and 8.540.07, 5.380.06 and 5.410.04, 8.200.04 and 7.860.02, and 5.790.01 and 5.790.05, respectively, when M2+ = Co2+ , Ni2+ , Cu2+ and Zn2+. These data are discussed together with those characterizing the less stable metallocyclodextrins formed by 6A-(3-aminopropylamino)-6A-deoxy-&#946;-cyclodextrin. 
