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Título : TetrahedralcoordinationforZninhexacyanometallates:Structuresof Zn3A2[M(CN)6]2 xH2O withA ¼ K, Rb,CsandM ¼ Ru,Os
Palabras clave : Inorganiccompounds
Microporousmaterials
X-raydiffraction
Crystalstructure
Fecha de publicación : 16-ene-2013
Editorial : Journal ofPhysicsandChemistryofSolids
Descripción : Zinc hexacyanoruthenate(II)andhexacyanoosmate(II)werepreparedandstudiedfromX-ray diffraction (XRD),infrared(IR),andthermogravimetric(TG)data.Thesecompoundswerefoundtobe isomorphouswiththeironanalogues,crystallizingwitharhombohedralunitcell(R 3c spacegroup), where thezincatomhastetrahedralcoordinationtoNendsofCNgroups.ForCs,compoundswith formulaunitZnCs2[M(CN)6] andacubicunitcell(Fm 3m) werealsoobtained.Thecrystalstructures for theeightcompositionswererefinedfromthecorrespondingX-raypowderdiffractionpatternsusing the Rietveldmethod.RelatedtothetetrahedralcoordinationfortheZnatom,therhombohedralphase has aporousframeworkwithellipsoidalcavitiesofabout12.5 9 8A˚ , communicatedbyelliptical windowsof 5A˚ . Withinthesecavitiestheexchangeablealkalimetalionsarefound.Thefillingofthe cavityvolumeiscompletedwithwatermolecules.IRspectrumsensescertainchargedelocalization from theinnermetal,throughthe p-back donationmechanism.ForOscompoundsthiseffectis particularlypronounced,relatedtoamorediffusedorbitalsforthismetal. & 2008ElsevierLtd.Allrightsreserved
URI : http://www.repositoriodigital.ipn.mx/handle/123456789/10986
Otros identificadores : Journal ofPhysicsandChemistryofSolids70(2009)477–482
http://hdl.handle.net/123456789/498
Aparece en las colecciones: Doctorado

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