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|Section3= |Section4= |Section5= |Section6= |Section7= |Section8= }} Tantalum(V) ethoxide is an metalorganic compound with formula Ta2(OC2H5)10, often abbreviated as Ta2(OEt)10. It is a colorless solid that dissolves in some organic solvents but hydrolyzes readily. In solution, it aggregates to form bioctahedral〔 dimers〔 with composition ()2. Several approaches for preparing tantalum(V) ethoxide are known but salt metathesis from tantalum(V) chloride is generally the most successful synthetic approach.〔 It is mainly used for the manufacture of tantalum(V) oxide thin-film materials by approaches including chemical vapor deposition,〔 atomic layer deposition,〔 and sol-gel processing.〔 These materials have semiconductor,〔 electrochromic,〔 and optical〔 applications. ==Structure== Metal alkoxides rarely adopt monomeric structures and tantalum(V) ethoxide is no exception. Early studies established that tantalum alkoxides aggregate in solution as dimers with octahedral six-coordinate tantalum metal centres. Subsequent crystallographic analysis established that the methoxide and isopropoxides of niobium adopt bioctahedral structures.〔 From a geometric perspective, the ten ethoxide ligand oxygen atoms of the Ta2(OEt)10 molecule in solution define a pair of octahedra sharing a common edge with the two tantalum atoms located at their centres.〔 From a bonding perspective, each tantalum centre is surrounded octahedrally by four monodentate and two bridging ethoxide ligands. The oxygen atoms of the bridging ethoxides are each bonded to both tantalum centres, and these two ligands are ''cis'' to one another within the coordination sphere. The formula ()2 more comprehensively represents this dimeric structure, though the simplified formula is commonly used for most purposes. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Tantalum(V) ethoxide」の詳細全文を読む スポンサード リンク
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