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Kim, Min Kyung,Jo, Vinna,Lee, Dong Woo,Ok, Kang Min Royal Society of Chemistry 2010 Dalton Transactions Vol.39 No.26
<P>A new layered bismuth tellurium oxychloride, Bi<SUB>3</SUB>Te<SUB>4</SUB>O<SUB>10</SUB>Cl<SUB>5</SUB> has been synthesized by a solid-state reaction under vacuum using Bi<SUB>2</SUB>O<SUB>3</SUB>, TeO<SUB>2</SUB>, and TeCl<SUB>4</SUB> as reagents. The structure of Bi<SUB>3</SUB>Te<SUB>4</SUB>O<SUB>10</SUB>Cl<SUB>5</SUB> has been determined by single-crystal X-ray diffraction. Bi<SUB>3</SUB>Te<SUB>4</SUB>O<SUB>10</SUB>Cl<SUB>5</SUB> contains two different lone pair cations, Bi<SUP>3+</SUP> and Te<SUP>4+</SUP> that are in asymmetric coordination environments. Bi<SUB>3</SUB>Te<SUB>4</SUB>O<SUB>10</SUB>Cl<SUB>5</SUB> has a novel two-dimensional layered structure consisting of distorted BiO<SUB>4</SUB>Cl<SUB>2</SUB> octahedra, BiO<SUB>4</SUB>Cl<SUB>3</SUB> polyhedra, TeO<SUB>4</SUB> polyhedra, and isolated Cl<SUP>−</SUP> ions. Complete structural analysis, infrared spectrum, thermogravimetric analysis, and dipole moment calculations are presented. Crystal data: Bi<SUB>3</SUB>Te<SUB>4</SUB>O<SUB>10</SUB>Cl<SUB>5</SUB>, monoclinic, space group <I>C</I>2/<I>m</I> (No. 12), <I>a</I> = 15.372(3) Å, <I>b</I> = 4.1004(7) Å, <I>c</I> = 13.301(2) Å, <I>β</I> = 98.336(5)°, <I>V</I> = 829.5(2) Å<SUP>3</SUP>, and <I>Z</I> = 2.</P> <P>Graphic Abstract</P><P>The lone pairs in Te<SUP>4+</SUP> cations point towards the free Cl<SUP>−</SUP> and impede the movement of the anionic template in Bi<SUB>3</SUB>Te<SUB>4</SUB>O<SUB>10</SUB>Cl<SUB>5</SUB>. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b927286k'> </P>