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钼是经常在生物酶中存在着金属元素之一,它在某些生物体系中很可能以某种原子簇的形式构成活性中心,例如固氮酶活性中心就是由钼铁硫组成的原子簇。Newton等人用EXAFS方法对铁钼辅基中钼的微环境的研究,发现与钼原子相距2.01处有氧原子配位。因此,我们企图合成钼原子有端基氧配的钼铁硫簇合物。在相类似合成条件下,改变不同的甲醇钠的浓度,得到了两种不同类型的簇合物,即[(C_2H_5)_4N]_3·[Fe(MoS_4)_2O_2和[(C_4H_9)_4N]_2[Mo_2S_6O_2]。本文报道[(C_4H_9)_4N]_2·[Mo_2S_6O_2]的合成、结构和性质研究。
Molybdenum is often one of the metal elements in the biological enzyme, which in some biological systems is likely to form some kind of atomic cluster activity centers, such as nitrogenase activity center is composed of molybdenum iron sulfur clusters. Newton et al. Studied the microenvironment of molybdenum in the iron-molybdenum prosthetic by the EXAFS method and found that oxygen atoms coordinate with the molybdenum atoms at 2.01. Therefore, we have attempted to synthesize molybdenum iron sulfur cluster compounds with terminal oxygen of molybdenum atoms. Under similar synthesis conditions, different concentrations of sodium methylate were changed to obtain two different types of cluster compounds, namely [(C 2 H 5) 4N] 3 [Fe (MoS 4) 2 O 2 and [C 4 H 9] 4N] Mo_2S_6O_2]. This paper reports the synthesis, structure and properties of [(C_4H_9) _4N] _2 · [Mo_2S_6O_2].