A C-13 NMR study of the interactions of (AgCN)-C-13 and Ag(CN)(2)(-) with thiomalic acid, L-methionine and DL-selenomethionine

作者：Isab AA^*; Wazeer MIM

来源：Spectroscopy: An International Journal , 2005, 19(5-6): 275-281.

• L-methionine
• DL-selenomethionine
• d,l-thiomalate
• AgNO3
• AgCN and Ag(CN)(2)(-)
• C-13 NMR

Complexation of Ag+ as AgNO3, solid AgCN and Ag(CN)(2)(-) by labeled and unlabeled L-methionine, DL-selenomethionine and d,l-thiomalate were studied by nuclear magnetic resonance methods. The C-13 NMR indicates that only Ag+ react with the both L-methionine, DL-selenomethionine at neutral and higher pH via CO2- and S or Se atom forming a chelate. The Ag(CN)(2)(-) and AgCN do not bind to either of these two ligands at any pH. The (AgCN)-C-13, which is an insoluble polymer, can react with thiomalate to form chelate complexes at neutral pH. Various structures for the chelate formations are proposed.

• 出版日期2005
• 单位中国石油大学（北京）