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Synthesis and Structures of the Capped and Sandwiched Cobalt Heptamolybdate Polyoxometalate $(NH_{4})_{6}{[Co(H_{2}O)_{5}][Mo_{7}O_{24}][Co(H_{2}O)_{2}][Mo_{7}O_{24}][Co(H_{2}O)_{5}$]} · 6 $H_{2}$O and Its Extended Structure $(NH_{4})_{6}{[Co(H_{2}O)_{2}]_{3}[Mo_{7}O_{24}]_{2}$}
| Content Provider | MDPI |
|---|---|
| Author | Spriet, Matthieu R. Polinski, Matthew J. Mercado, Brandon Q. Villa, Eric M. |
| Copyright Year | 2022 |
| Description | Two polyoxometalate-based compounds containing the heptamolybdate anion and cobalt(II) have been synthesized, structurally characterized via single-crystal X-ray diffraction and spectroscopically analyzed with solid-state UV–Vis–NIR. The first crystal structure presented is a capped- and sandwich-style polyoxometalate $(NH_{4})_{6}{[Co(H_{2}O)_{5}][Mo_{7}O_{24}$] $[Co(H_{2}O)_{2}][Mo_{7}O_{24}][Co(H_{2}O)_{5}$]} · 6 $H_{2}$O $(Co_{3}Mo_{14}$-POM). This orange product crystallizes in the P-1 space group and has an interesting structure for polyoxometalates (POMs). Here, the cobalt(II) groups are functioning both as a bridge between two heptamolybdate units and also capping units at the top and the bottom of the polyoxometalate. The second structure, another product within the same reaction, is constructed on a similar bonding motif but now forms an extended structure: $(NH_{4})_{6}{[Co(H_{2}O)_{2}]_{3}[Mo_{7}O_{24}]_{2}$} $(Co_{3}Mo_{14}$-ES). This compound also crystallizes in the space group P-1 but is easily separated due to its much darker red-violet color. These structures present themselves as a noteworthy compounds within POM-based crystal structures. Herein, the syntheses, crystal structures and characterization of these compounds are presented. |
| Starting Page | 1201 |
| e-ISSN | 20734352 |
| DOI | 10.3390/cryst12091201 |
| Journal | Crystals |
| Issue Number | 9 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-08-26 |
| Access Restriction | Open |
| Subject Keyword | Crystals Inorganic Chemistry Polyoxometalates Heptamolybdate Cobalt Crystal Structures |
| Content Type | Text |
| Resource Type | Article |
