在正四丁基八钼酸(β型)铵和微量乙二胺的存在下,丙酮分子发生羟醛缩合形成了4甲基4羟基2戊酮,并与八钼酸根和正四丁基铵阳离子组成了标题化合物。X射线单晶结构分析表明该晶体属三斜晶系,空间群为P1,Mr=190277,a=11512(6)nm,b=1.2790(3)nm,c=1.3395(4)nm,α=6522(2)°,β=78.26(4)°,γ=71.12(3)°,Z=1,R=0.053,Rw=0.067。结果表明4甲基4羟基2戊酮的形成有可能揭示钼多酸的另一催化功能。 In the presence of n-tetrabutylammonium octamolybdate (beta-type) ammonium and trace ethylenediamine, aldol condensation of acetone molecules formed 4 methyl 4-hydroxy 2-pentanone and octamolybdate and n-tetrabutylammonium cations The title compound. The X-ray single crystal structure analysis shows that the crystal belongs to triclinic system with space group P1, Mr = 190277, a = 11512 (6) nm, b = 1.2790 (3) nm, c = 1.3395 6522 (2) °, β = 78.26 (4) °, γ = 71.12 (3) °, Z = 1, R = 0.053, Rw = 0.067. The results indicate that the formation of 4-methyl 4-hydroxy 2-pentanone may reveal another catalytic function of the molybdic acid.