Synthesis, crystal structure and NMR of [Na(DB18C6)(CH3CN)]3[α-AsM12O40] (M = Mo/W) |
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| Authors: | Xiaoming Lu Bo Liu Sarula Jing Wang Chaohui Ye |
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| Affiliation: | aDepartment of Chemistry, Capital Normal University, Beijing 100037, China;bResearch institute of Petroleum Processing, SINOPEC, Beijing 100083, China;cWuhan Institute of Physics and Mathematics, Wuhan 430071, China |
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| Abstract: | Two super-molecular complexes [Na(DB18C6)(CH3CN)]3[α-AsM12O40] (M = Mo/W) were obtained by solvothermal reaction and characterized by IR,1H 13C and gUMBC NMR, X-ray. The result reveals that the complex consists of a [α-AsM12O40]3− (M = Mo/W) anion with α-Keggin structure, and three complex [Na (DB18C6)(CH3CN)]+ cations in which every sodium ion is located in the cavity of dibenzo-18-crown-6 with 6 Na–O bonds and coordinated with one of the terminal O atom of [α-AsM12O40]3− (M = Mo/W) and the N atom of CH3CN from two sides of the distorted DB18C6 plane, respectively. The three terminal O atoms linked with sodium ion are from a single M3O13 (M = Mo/W) triplet of the α-Keggin metalatoarsenate anion, and M–Ob (M = Mo/W) bonds exhibit alternating single–double bond character. |
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| Keywords: | Crown ether Polyoxometalates Crystal structure Solvothermal reaction |
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