Na[Co(OX)_2(N,N’-Me_2en)]的合成、异构体分离、空间构型推定和性质研究

STUDY ON SYNTHESIS, SEPARATION OF ISOMERS, STERIC STRUCTURE AND CHARACTERIZATION FOR Na[Co(OX)_2(N,N'-Mc_2cn)]

合成了具有三个手性原子的二草酸根、N,N＇-二甲基乙二胺合钴(Ⅲ)酸钠配合物.用离子交换法分离了该配合物三对可能的对映体:△(SS)(?)(RR)、△(SR)(?)(RS)和△(RR)(?)(SS)对映体,用质子核磁共振法推定了异构体的空间构型,用高效液相色谱法测定了三对对映体的平衡生成率,其相对比值(34.0℃)为:△(SS)(?)(RR):△(SR)(?)(RS):△(RR)(?)(SS)=58:33:9.各对映体d-d跃迁最大吸收峰波数次序为:△(SS)(?)(RR)>△(SR)(?)(RS)>△(RR)(?)(SS).

The complex of sodium bis(oxalato) (N,N'-dimethylethylenediamine) cobalt(Ⅲ) has been synthesized. It belongs to the ternary and asymmetric octahedral complex with three chiral atomic centers. And three possible racemic pairs of the complex, A(SS)A(RR), A(SR)A(RS) and A(RR)A(SS)-isomer, were separated by ion exchange method. the steric structure of the isomers were characterized by 1H NMR method. The isomer distribution at equilibrium were determined by high performance liquid chromatographic method. The relative value is : A(SS)A(RR) : A(SR)A(RS): A(RR)A(SS) = 58 : 33 : 9(34.0℃). The wave number of d-d absorption peaks decreased in the order of A(SS)A(RR) > A(SR)A(RS) > A(RR)A(SS).