Synthesis, Characterization, and Crystal Structures of Two Novel High-Nuclear Nickel-Substituted Dimeric Polyoxometalates

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• 作者：Zhiming Zhang ; Yangguang Li ; Enbo Wang ; Xinlong Wang ; Chao Qin ; and Haiyan An
• 刊名：Inorganic Chemistry
• 出版年：2006
• 出版时间：May 29, 2006
• 年：2006
• 卷：45
• 期：11
• 页码：4313 - 4315
• 全文大小：114K
• 年卷期：v.45,no.11(May 29, 2006)
• ISSN：1520-510X

文摘

Two novel high-nuclear Ni-substituted polyoxometalates Na₉K[Ni₇(OH)₄(H₂O)(CO₃)₂(HCO₃)(A-mages/gifchars/alpha.gif" BORDER=0>-SiW₉O₃₄)(mages/gifchars/beta2.gif" BORDER=0 ALIGN="middle">-SiW₁₀O₃₇)]·5H₃O·18H₂O (1) and K₆Na₄[{Ni₆(H₂O)₄(mages/entities/mgr.gif">₂-H₂O)₄(mages/entities/mgr.gif">₃-OH)₂}(x-SiW₉O₃₄)₂]·17.5H₂O (2) have been obtained by reaction of K₈[mages/gifchars/gamma.gif" BORDER=0 >-SiW₁₀O₃₆]with NiCl₂·2H₂O in basic conditions. Compounds 1 and 2 allrepresent the first polyoxometalates substituted by seven and sixNi centers, respectively. Also, compound 1 exhibits a novelasymmetric dimeric structure, composed of [A-mages/gifchars/alpha.gif" BORDER=0>-SiW₉O₃₄]^10- and[mages/gifchars/beta2.gif" BORDER=0 ALIGN="middle">-SiW₁₀O₃₇]^10- units linked by a Ni₇ cluster and three carbonates,which exhibit tri- and bidentate coordination modes in 1.