3.2.2. Synthesis of [NH4]2{CuMo6O16(OH)2[CH3C(CH2O)3]2}·2H2O (**2**)

The synthetic procedure of compound **2** was similar to that of compound **1** except that the pH of the solution was adjusted to 2. Elemental analysis calcd. (%) for [NH4]2{CuMo6O16(OH)2[CH3C(CH2O)3]2}·2H2O (Mw = 1235.58 g mol<sup>−</sup>1): C 9.72%, H 2.61%, N 2.27%, Cu 5.14%, and Mo 46.59%; found C 9.31%, H 2.80%, N 2.31%, Cu 5.21%, and Mo 46.76%.
