METAL CHELATES OF SOME SULFUR-CONTAINING AMINO ACIDS
METAL CHELATES OF SOME SULFUR-CONTAINING AMINO ACIDS
复制标题
DOI:
10.1021/bi00894a001
复制
发表时间:
1964-01-01
期刊:
影响因子:
2.9
通讯作者:
MARTELL, AE
中科院分区:
文献类型:
--
作者:
LENZ, GR;MARTELL, AE
Acid-dissociation constants of DL-methionine, S-methyl-L-cysteine, DL-ethionine. L-cysteine, and DL-penicillamine, and the chelate-stability constants with Ag(I), Ca(II), Cd(II), Co(II), Cu(II), Hg(n), Mg(II), Mn(n), Ni(n), Pb(n), Sr(II), and Zn(n) are reported for 25[degree] and 0.10 [image] ionic strength. L-Cysteine and DL-penlcillamine are terdentate with respect to Cd(n), Hg(n), and Pb(II), and bidentate with the other metals, excepting Ag(I). All ligands are monodentate toward Ag(I); penicillamine forms only a protonated Ag(I) complex, and the cysteinate-Ag(I) complex precipitates. DL-Methionine, S-methyl-L-cysteine, and DL-ethionine are bidentate toward all other metals. There was no evidence of chelate formation of any of the ligands with the alkaline earths.