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通式为MW_(11)O_(39)的“不饱和”11-系列杂多阴离子仍然保持了基本的Keggin结构,但失去了其中的一个W-O基团。MW_(11)O_(39)具有很高的反应活性,当其他金属离子(或3A主族元素离子)进入这一空位时,便形成了三元杂多配合物ZMW_(11)和Ln(MW_(11))_2。ZMW_(11)(Z为3A主族金属离子和过渡金属离子)中,11-杂多阴离子起着五齿配体的作用,第六个配位位置被结构水占据,ZMW_(11)基本保持原来的Keggin结构。Ln(MW_(11))_2(Ln为镧系或锕系离子)
The “unsaturated” 11-series heteropolyanions of the general formula MW 11 O 39 (39) still retain the basic Keggin structure but lose one of the W-O groups. MW 11 O 39 has high reactivity. When other metal ions (or main ions of 3A group) enter this vacancy, the ternary heteropoly complexes ZMW 11 and Ln MW_ (11)) _ 2. In ZMW11 (Z is 3A main metal ion and transition metal ion), 11-heteropolyanion plays a role of a pentagonal ligand. The sixth coordination site is occupied by structural water, and ZMW 11 remains basically The original Keggin structure. Ln (MW_ (11)) _2 (Ln is a lanthanide or actinide ion)