955(2), b=17.176(6), c=21.829(9) A, Z=4) are reported. Binding of HgCl2 is through N7 of the purine bases. In 1 discrete molecules are formed, while 2 is a linear polymer with (HgCl)n chains to which the guanine bases and chloro ligands are coordinated. The solution behavior is characterized by a rapid ligand exchange and low complex formation constants, log β1=0.4 (1), 1.3 (1:1 adduct of 2) and 1.0 [HgCl2·9-EtGH]
摘要研究了HgCl2与
9-乙基鸟嘌呤,1,9-二甲基
鸟嘌呤和2-
氨基-6-甲氧基-9-甲基
嘌呤(6,9-二甲基
鸟嘌呤)的配位。配合物HgCl2(2-
氨基-6-甲氧基-9-甲基-
嘌呤-N7)(1)的X射线结构(单斜晶系,P21 / m,a = 10.160(3),b = 6.222(1), c = 11.060(3)A,β= 116.11(2)°,Z = 2)和[HgCl2·(1,9-二甲基-
鸟嘌呤-N7)] 2HgCl2} n(2)(斜方晶系,Pbca,a =报告了6.955(2),b = 17.176(6),c = 21.829(9)A,Z = 4)。HgCl2的结合通过
嘌呤碱基的N7进行。在1个分子中形成了离散分子,而在2个分子中则是带有(Hg = Cl)n链的线性聚合物,
鸟嘌呤碱基和
氯配体与该聚合物配位。溶液行为的特征在于快速的
配体交换和低的络合物形成常数,logβ1= 0.4(1),1