| Crystal Structure of Bridged Dimer Complex of [Yb (H_2O)) (acac)_2 (Ac)]_2 |
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| 作者姓名： | SHEN Cheng |
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| 作者单位： | Chemistry Department，Changsha Electric Power University，Changsha 410077 |
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| 摘 要： | 1INTRODUCTIONTheacetylacetonatoisanexcellentbidentateligand.Withittherareearthmetalionscanformsomeseriesofcomplexes,suchasLn(acac)3.nH,O(n=1～4)andLn-(acac)4etc.1-5i.lntheeventletasampleofthecomplexLn(acac)3.3H,Odis-solveinacetylacetonewhichmixeswithaceticacidforrecrystallization.Asaresultasubstitutionreactionofligandsinthesolutionarises.Anacetylacetonatoandacoor-dinatedwatermolecu1eofLn(acac),.3H,Oaresubstitutedbytwoacetatosandanon-coordinatedwatermoleculeisremoved.Amixedligandandbr…
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| 关 键 词： | acetylacetonato crystal structure bridged dimer complex tetraacetylacetonatodiaquo-μ-diacetatodiytterbium (Ⅲ) |
Crystal Structure of Bridged Dimer Complex of [Yb (H_2O)) (acac)_2 (Ac)]_2 |
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| SHEN Cheng.Crystal Structure of Bridged Dimer Complex of [Yb (H_2O)) (acac)_2 (Ac)]_2[J].Chinese Journal of Structural Chemistry,1997(5). |
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| Authors: | SHEN Cheng |
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| Abstract: | The title complex C24H38O14Yb2(Mr=896. 62 ) crystallized in orthorhombic system, space group Pbcn with unit cell dimensions a=13. 478 (4), b=16. 161(7), c=15. 110(5); V=3291. 2(2); Z=4; F(000) = 1736; Dc=1. 810g. cm-3;μ= 17. 5 cm-1 (MoKa). The final R and Rw are 0.061 and 0.058 respectively. The title complex is a bridged dimer. The ligands that bridge two Yb(Ⅲ) centerions are the two acetatos in the complex and every Yb(Ⅲ) ion is eight-coordinated, being bonded to one O atom of one H,O molecule, four O atoms of two acetylacetonatos,two O atoms of an acetato and one O atom of another acetato. The coordination polyhedron of the Yb(Ⅲ) ion in the title complex is a dodecahedron. |
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| Keywords: | acetylacetonato crystal structure bridged dimer complex tetraacetylacetonatodiaquo-μ-diacetatodiytterbium (Ⅲ) |
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