Facile and optimized syntheses and structures of crystalline molybdenum blue compounds including one with an interesting high degree of defects: Na < inf > 26 < /inf > [Mo < inf > 142 < /inf > O < inf > 432 < /inf > (H < inf > 2 < /inf > O) < inf > 58 < /inf > H < inf > 14 < /inf > ] · ca. 300 H < inf > 2 < /inf > O

Abstract

The syntheses and structures of the two mixed-valence 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.