[Co(3,3-tri)(amp)Cl]^(2+)四个经式异构体的NMR研究

Study on 2D NMR Spectra of the Four Meridional Isomers in [Co(3,3-tri)(amp)Cl]^(2+) System

利用一维及二维核磁共振谱,如gCOSY和NOESY,对合成的4个[CO(3,3-tri)(amp)Cl]^(2+)经式异构体的溶液结构进行了解析,与柱色层方法分离出的四带配合物对照的结果是:b1=m2;b2=m_4;b_3=m1;b4=m3.

The configurations of the four geometric mer - isomers in a new [Co(3,3 - tri) (amp)Cl]2+ [3,3-tri = N - (3 - aminoethyl) - 1,3 - propanediamine; amp = 2 - (aminomethyl)pyridine] system were assigned by using 2D NMR techniques such as gCOSY and NOESY. Solvent used was Me2SO - d6 with the central peak of the CD3 septet as the reference (13C, δ = 39.37; 1H, δ=2.49 relative to SiMe4). Comparing to the eluates from the chromatographic column, cation exchange media used was Dowex 50W×2 (H+ form, 200 - 400 mesh; Biorad Compauy), the first band contains the m2, the second band contains the m4, the third band contains the ml and the fourth band contains the m3.