Facile and Optimized Syntheses and Structures of Crystalline Molybdenum Blue Compounds Including one with an Interesting High Degree of Defects: Na₂₆[Mo₁₄₂O₄₃₂(H₂O)₅₈H₁₄] · ca. 300 H₂O and Na₁₆[(MoO₃)₁₇₆(H₂O)₆₃(CH₃OH)₁₇H₁₆] · ca. 600 H₂O · ca. 6 CH₃OH

The syntheses and structures of the two mixedvalence crystalline molybdenum blue compounds Na₂₆[Mo₁₄₂O₄₃₂(H₂O)₅₈H₁₄] · ca. 300 H₂O (1) (containing the maximal number of well defined defects which influence the overall structure and the reactivity of the anionic cluster) and Na₁₆[(MoO₃)₁₇₆(H₂O)₆₃(CH₃OH)₁₇H₁₆] · ca. 600 H₂O · ca. 6 CH₃OH (2) (obtained in an optimized high-yield synthesis) are reported with reference to the critical conditions required for the isolation of corresponding crystalline materials.