Co-ordination of alkali metals by open-chain polyethers in transition-metal complexes. Part 2. An explanation for alkali-metal selectivity from the X-ray and molecular structure of tetrakis[1-(o-carboxymethoxyphenoxy)-2-(o-hydroxyphenoxy)ethanato(1–)]dirubidiumcobalt(<scp>II</scp>) and comparison with the dipotassium analogue
作者:David L. Hughes、Jonathan N. Wingfield
DOI:10.1039/dt9830000915
日期:——
The synthesis and X-ray crystal structure of the title compound [Co(L2Rb)2], containing the tifunctional centre Rb–Co–Rb, is reported and compared with the analogous [Co(L2K)2] structure. The selectivity of the moiety [CoL4]2– between alkali metals and, in particular, for potassium is discussed on the basis of this comparison. Crystals of [Co(L2Rb)2] are triclinic, a= 14.352(4), b= 14.911(3), c= 16
报告了标题化合物[Co(L 2 Rb)2 ]的合成和X射线晶体结构,该化合物含有功能性中心Rb–Co–Rb,并与类似的[Co(L 2 K)2 ]结构进行了比较。在此比较的基础上,讨论了碱金属之间[CoL 4 ] 2–的选择性,特别是对钾的选择性。[Co(L 2 Rb)2 ]的晶体为三斜晶,a = 14.352(4),b = 14.911(3),c = 16.772(3),α= 93.16(2),β= 106.75(2),γ = 110.91(2)°,Z =2。结构精制为R= 3585次反射的0.055。