Metal(II) Hexafluorophosphates(V) (M = Sr, Pb) Containing XeF2-Coordinated Metal Ions [M(XeF2)3](PF6)2, [Pb3(XeF2)11
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- 作者：Tina Buni
//pubs.acs.org/images/entities/ccaron.gif" border="0"> ; Melita Tram
- 刊名：Inorganic Chemistry
- 出版年：2007
- 出版时间：June 25, 2007
- 年：2007
- 卷：46
- 期：13
- 页码：5276 - 5282
- 全文大小：408K
- 年卷期：v.46,no.13(June 25, 2007)
- ISSN：1520-510X
文摘
From the system MF2/PF5/XeF2/anhydrous hydrogen fluoride (aHF), four compounds [Sr(XeF2)3](PF6)2, [Pb(XeF2)3](PF6)2, [Sr3(XeF2)10](PF6)6, and [Pb3(XeF2)11](PF6)6 were isolated and characterized by Raman spectroscopy andX-ray single-crystal diffraction. The [M(XeF2)3](PF6)2 (M = Sr, Pb) compounds are isostructural with the previouslyreported [Sr(XeF2)3](AsF6)2. The structure of [Sr3(XeF2)10](PF6)6 (space group C2/c; a = 11.778(6) Å, b = 12.497(6) Å, c = 34.60(2) Å, 
gifchars/beta2.gif" BORDER=0 ALIGN="middle"> = 95.574(4)
gif">, V = 5069(4) Å3, Z = 4) contains two crystallographically independentmetal centers with a coordination number of 10 and rather unusual coordination spheres in the shape of tetracappedtrigonal prisms. The bridging XeF2 molecules and one bridging PF6- anion, which connect the metal centers, formcomplicated 3D structures. The structure of [Pb3(XeF2)11](PF6)6 (space group C2/m; a = 13.01(3) Å, b = 11.437(4)Å, c = 18.487(7) Å, gifchars/beta2.gif" BORDER=0 ALIGN="middle"> = 104.374(9)gif">, V = 2665(6) Å3, Z = 2) consists of a 3D network of the general formula{[Pb3(XeF2)10](PF6)6}n and a noncoordinated XeF2 molecule fixed in the crystal structure only by weak electrostaticinteractions. This structure also contains two crystallographically independent Pb atoms. One of them possessesa unique homoleptic environment built up by eight F atoms from eight XeF2 molecules in the shape of a cube,whereas the second Pb atom with a coordination number of 9 adopts the shape of a tricapped trigonal prismcommon for lead compounds. [Pb3(XeF2)11](PF6)6 and [Sr3(XeF2)10](PF6)6 are formed when an excess of XeF2 isused during the process of the crystallization of [M(XeF2)3](PF6)2 from their aHF solutions.
gifchars/beta2.gif" BORDER=0 ALIGN="middle"> = 95.574(4)gif">, V = 5069(4) Å3, Z = 4) contains two crystallographically independentmetal centers with a coordination number of 10 and rather unusual coordination spheres in the shape of tetracappedtrigonal prisms. The bridging XeF2 molecules and one bridging PF6- anion, which connect the metal centers, formcomplicated 3D structures. The structure of [Pb3(XeF2)11](PF6)6 (space group C2/m; a = 13.01(3) Å, b = 11.437(4)Å, c = 18.487(7) Å, gifchars/beta2.gif" BORDER=0 ALIGN="middle"> = 104.374(9)gif">, V = 2665(6) Å3, Z = 2) consists of a 3D network of the general formula{[Pb3(XeF2)10](PF6)6}n and a noncoordinated XeF2 molecule fixed in the crystal structure only by weak electrostaticinteractions. This structure also contains two crystallographically independent Pb atoms. One of them possessesa unique homoleptic environment built up by eight F atoms from eight XeF2 molecules in the shape of a cube,whereas the second Pb atom with a coordination number of 9 adopts the shape of a tricapped trigonal prismcommon for lead compounds. [Pb3(XeF2)11](PF6)6 and [Sr3(XeF2)10](PF6)6 are formed when an excess of XeF2 isused during the process of the crystallization of [M(XeF2)3](PF6)2 from their aHF solutions.