Hydrogen-bonded pillars of alternating chiral complex cations and anions: 1. Synthesis, characterization, X-ray structure and thermal stability of catena-{[Co(H(2)oxado)(3)][Cr(C(2)O(4))(3)].5H(2)O} and of its precursor (H(3)oxado)[Co(H(2)oxado)(3)](SO(4))(2).2H(2)O.
Hydrogen-bonded pillars of alternating chiral complex cations and anions: 1. Synthesis, characterization, X-ray structure and thermal stability of catena-{[Co(H(2)oxado)(3)][Cr(C(2)O(4))(3)].5H(2)O} and of its precursor (H(3)oxado)[Co(H(2)oxado)(3)](SO(4))(2).2H(2)O.
复制标题
交替手性络合物阳离子和阴离子的氢键柱：1.catena-{[Co(H(2)oxado)(3)][Cr(C(2)O)的合成、表征、X射线结构和热稳定性
作者：
M. Bélombé;J. Nenwa;Y. Mbiangué;F. Majoumo;P. Lönnecke;E. Hey‐Hawkins
化合物（H（3）oxado）[Co（H（2）oxado）（3）]（SO（4））（2）·2 H（2）O（）（H（3）oxado（+）=草酰胺二肟单肟）与Ba（6）（H（2）O）（17）[Cr（C（2）O（4））（3）]（4）·7 H（2）O在水中进行复分解反应，得到一维络合盐{[Co（H（2）oxado）（3）][Cr（C（2）O（4））（3）]·5 H（2）。O}（无穷大）（）（H（2）oxado =草酰胺二肟）。通过元素分析、红外光谱、紫外-可见光谱和X-射线单晶结构测定对化合物进行了表征。的结构由交替的手性络合物阳离子和阴离子的无限柱组成，它们通过静电和纵向O-HO相互作用沿沿着[100]连接在一起，平均链内CoCr分离为4.94 A。赤道N-HO桥交联相邻的柱（其具有相反的手性）并巩固三维晶格框架，该三维晶格框架描绘平行于a轴的椭圆形纳米通道，封装高度无序的水分子。这两种化合物的热稳定性进行了评估，通过TGA和有效磁矩，在室温下检查，揭示了相当大的自旋轨道耦合。
Compound (H(3)oxado)[Co(H(2)oxado)(3)](SO(4))(2).2H(2)O () (H(3)oxado(+) = oxamide dioximemonoximium) reacted metathetically with Ba(6)(H(2)O)(17)[Cr(C(2)O(4))(3)](4).7H(2)O in water to give the one-dimensional complex salt {[Co(H(2)oxado)(3)][Cr(C(2)O(4))(3)].5H(2)O}(infinity) () (H(2)oxado = oxamide dioxime). Compounds and were characterized by elemental analysis, FTIR, UV-Vis and by single crystal X-ray structure determination. The structure of consists of infinite pillars of alternating chiral complex cations and anions linked together along [100] by electrostatic and longitudinal O-HO interactions, with an average intrachain CoCr separation of 4.94 A. Equatorial N-HO bridges cross-link neighboring pillars (which are of opposite chirality) and consolidate a three-dimensional lattice framework which delineates elliptic nanochannels parallel to the a axis, encapsulating highly disordered water molecules. The thermal stability of both compounds was assessed by TGA, and the effective magnetic moment of , checked at room temperature, revealed considerable spin-orbit coupling.