Effects of side chain amino nitrogen donor atoms on metal complexation of aminohydroxamic acids: New diaminohydroxamates chelating Ni(ii) more strongly than Fe(iii)
作者:Éva A. Enyedy、Hajnalka Csóka、István Lázár、Giovanni Micera、Eugenio Garribba、Etelka Farkas
DOI:10.1039/b111184a
日期:——
further interactions. The amino groups do not co-ordinate to aluminium(III) or iron(III) at all and the closer the side chain amino group is situated to the α-aminohydroxamic residue the less stable the hydroxamate complex formed in the order of Lysha, Dambha, Dampha, and hydrolytic processes become increasingly dominant. The co-ordination of the side chain amino nitrogen of Dampha and Dambha to nickel(II)
二氨基异羟肟酸2,6-二氨基-N-羟基己酰胺(赖氨酸异羟肟酸(Lysha), 2,4-二氨基-N-羟基丁酰胺 (2,4-二氨基丁氧基异羟肟酸,Dambha)和2,3-二氨基-N-羟基丙酰胺(2,3-二氨基丙氧基异羟肟酸,Dampha)与锰(II),钴(II),铁(II),镍(II),铜(II),锌(II),铁(III),铝(III)和钼(VI) pH电位,紫外可见分光光度法和电子病历方法。后两种二氨基异羟肟酸被合成为新的配体和表征。将结果与简单的α-氨基酸衍生物α-丙氨酸异羟肟酸(α-Alaha)的结果和侧链的影响进行了比较氨基对配位模式和所形成的配合物的稳定性进行了评价。不出所料,侧链 氨基 氮原子Lysha的产品与任何已研究的金属都不协调,但对于可能的进一步相互作用仍然是自由的。氨基根本不与铝(III)或铁(III)配位,并且侧链越靠近氨基 位于α-氨基异羟肟酸残基上,稳定性越差 异羟