摘要
本文作者制得的单品经分析证明是由质子化大环LH_4^(+4)阳离子、Co(NCS)_6^(-4)阴离子、一分子Co(No_3)_2和4分子H_2O组成,还证明质子化大环L以船式构象存在,为研究超分子配合物的催化机理提供了结构依据。本实验还发现六异硫氰根合钴(Ⅱ)配阴离子能稳定存在。
A new complex of protonated 24-membered hexaaza-dioxa macrocycle LH4+4 with hex-aisothiocyanatocobalt( 2 ) was synthesized and the crystal structure of [C16H42N6O2][Co(NCS)6] · Co (NO3)2 · 4H2O was determined. It crystallizes in the triclinic system, space group Pl(a = 7. 992(1) A , 6=11. 007(2) A, c-=27. 328(2) A , a = 79. 01(2)°, β=81. 57(2)°, y= 68. 70(2)°, V = 2190. 9A3, Z=2). The protonated macrocycle L in the complex is in a boat type conformation. Comparing IR and NMR of the free protonated macrocycle L with those of the macrocycle L in the complex, it is proved that the conformation of the free protonated macrocycle L is the same as that of the macrocycle L in the complex. The results obtained provide a basis for study of catalytic mechanism in supermolecule.The six-coordinated isothiocyanatocobalt complex anion [Co(NCS)6]-4 is rare in the literature. Its structure is octahedral.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1990年第6期660-662,共3页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
钴配合物
大环化合物
晶体结构
Crystal structure, Macrocycle compound, Complex
