Formation constants of silver(I) complexes of some sulphur-containing dipeptides and valylvaline
作者:Anthony Q. Lyons、Leslie D. Pettit
DOI:10.1039/dt9840002305
日期:——
Formation constants at 25 °C and I= 0.10 mol dm –3(KNO3) have been determined for the complexes of AgI with a range of nine dipeptides which incorporate side-chains containing one (glycylmethionine and methionylglycine) or two sulphur donor atoms. In the latter case dipeptides formed from amino acids of the same and of different chiralities were studied (e.g. L-methionyl-L-methionine and L-methionyl-D-methionine)
已经确定了在25°C和I = 0.10 mol dm –3(KNO 3)时的形成常数,其中包括具有九个二肽的Ag I配合物,这些二肽结合了含有一个(糖基蛋氨酸和蛋氨酸基甘氨酸)或两个硫供体原子的侧链。 。在从相同的氨基酸和不同手性的形成在后一种情况下二肽进行了研究(例如,大号-methionyl-大号-甲硫氨酸和大号-methionyl- d蛋氨酸)。将结果与缬氨酰缬氨酸进行比较。形成常数的值根据二肽的优选构象和Ag的趋势来解释I与S-供体原子键合或通过形成二聚体配合物进行线性配位。