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在合成犤Co(bpma)(tn)Cl犦2+体系配合物的实验中,得到犤Co(ptma)(amp)Cl犦2+体系的一反式(ptma中仲胺上的氢相对于Cl)经式异构体(m3犤ZnCl4犦·0.5H2O),其中bpma=N,N’-二(2-吡啶基甲基)胺,tn=1,3丙二胺,ptma=N-(2-吡啶基甲基)丙二胺,amp=2-(氨基甲基)吡啶。此配合物异构体构型选择性形成的原因可能主要是其结构中配体间C-H…π相互作用使之更稳定的结果。利用单晶X-射线衍射法测定的晶体学参数:单斜晶系,空间群C2/c,a=1.55978(19)nm,b=1.33324(16)nm,c=2.2077(3)nm,β=94.832(3)°,V=4.5748(10)nm3,Dc=1.696g·cm-3,Z=8,F000=2360,μ(MoKα)=23.72cm-1,R=0.0475,Rw=0.1204。配合物离子中Co3+为六配位。晶胞中含8个配合物阳离子,8个犤ZnCl4犦2-阴离子及4个水分子,对映体的比例为1∶1。
In the experiment of synthesizing the Co (bpma) (tn) Cl 犦 2+ system complexes, one trans (氢 Co (ptma) ()) Cl 犦 2+) (M3 犤 ZnCl4 犦 · 0.5H2O) where bpma = N, N’-bis (2-pyridylmethyl) amine, tn = 1,3 propylenediamine, ptma = N- -pyridylmethyl) propanediamine, amp = 2- (aminomethyl) pyridine. The reason for the selective formation of the isomeric configuration of this complex may mainly be the result of a more stable C-H ... π interaction between the ligands in its structure. The crystallographic parameters determined by single crystal X-ray diffraction are as follows: monoclinic, space group C2 / c, a = 1.55978 (19) nm, b = 1.33324 (16) nm, c = = 94.832 (3) °, V = 4.5748 (10) nm3, Dc = 1.696 g · cm -3, Z = 8, F000 = 2360, μ (MoKα) = 23.72 cm -1, R = 0.0475, Rw = 0.1204. Co3 + in complex ions is hexacoordination. The unit cell contains 8 complex cations, 8 ZnCl4 犦 2- anions and 4 water molecules with a 1: 1 enantiomeric ratio.