【摘要】 钼酸根或硫代钼酸根与半胱氨酸盐酸盐及次硫酸钠作用生成氧桥或硫桥二钼(V)丰胱氦酸络合物。本文剖析反应过程和合成产物在酸碱溶液中的核磁共振谱,顺磁共振谱,电子谱,磁化率以及晶体结构的数据;推导化合物的合成机理;讨论化合物在酸碱溶液中的化学稳定性以及不同桥原子对化学稳定性的影响。本文还对可能的磁结构作了探讨。更多还原

【Abstract】 Thiomolybdates, (Mo,4-n Sn)= with n=0-4, react readily with cysteine hydrochloride and sodium dithionite to form oxygen and/or sulfur bridged dimolybdenum(V) complexes,{Mo2O2(u2-O)2-m(u2-S)m --Cys2}=with m=0-2. The reaction mechanism is studied with ESR and NMR.The. dimolybdenum(V) complexes dissociate readily in concentrated acid and partially in basic solution as shown by ESR and magnetic susceptibility. The disulfur bridged complex is the most stable one of the three.By comparing bond lengths, magnetic susceptibility, 1H NMR and C NMR spectra of different bridged complexes, the mechanism of antiferromagnetic coupling between two Mo(V) atoms is suggested.更多还原