observed reflections. The structure comprises infinite linear arrays of silver atoms doubly bridged by methionine sulphur atoms and nitrate groups. Each silver atom is surrounded by two sulphurs at 2.511(2) and 2.577(2)Å, two oxygens of a nitrate group at 2.512(7) and 2.574(9)Å, and two oxygens of a second nitrate group at 2.523(9) and 2.855(9)Å. Comparison with the crystal structure of the uncomplexed dipeptide
标题化合物的结构已经通过单晶X射线衍射法确定。该化合物在单斜晶系空间群P 2 1中结晶,其晶胞尺寸为a = 13.634(6),b = 6.225(4),c = 6.784(4)Å,β= 104.8(7)°,并且Z =2。通过重原子方法求解结构,并通过最小二乘法将其精炼为常规R基于1 342个独立观察到的反射的系数为0.052。该结构包括由蛋
氨酸
硫原子和
硝酸根基团双重桥接的
银原子的无限线性阵列。每个
银原子在2.511(2)和2.577(2)Å处被两个
硫原子包围,在2.512(7)和2.574(9)Å处被
硝酸根基团的两个氧包围,在2.523(9)下被另一个
硝酸根基团的两个氧包围。 )和2.855(9)Å。与未络合的二肽的晶体结构比较表明,配位后构象发生了显着变化。