Gelmboldt Vladimir O, Ganin Eduard V, Domasevitch Konstantin V
Physico-Chemical Instutute of Environmental and Human Protection, Ministry of Education and Science of Ukraine and National Academy of Sciences of Ukraine, Preobrazhens'ka Street 3, Odessa 65082, Ukraine.
Acta Crystallogr C. 2007 Sep;63(Pt 9):o530-4. doi: 10.1107/S0108270107035469. Epub 2007 Aug 9.
In bis(2-carboxypyridinium) hexafluorosilicate, 2C(6)H(6)NO(2)+.SiF6(2-), (I), and bis(2-carboxyquinolinium) hexafluorosilicate dihydrate, 2C(10)H(8)NO(2)+.SiF6(2-).2H2O, (II), the Si atoms of the anions reside on crystallographic centres of inversion. Primary inter-ion interactions in (I) occur via strong N-H...F and O-H...F hydrogen bonds, generating corrugated layers incorporating SiF6 anions as four-connected net nodes and organic cations as simple links in between. In (II), a set of strong N-H...F, O-H...O and O-H...F hydrogen bonds, involving water molecules, gives a three-dimensional heterocoordinated rutile-like framework that integrates SiF6 anions as six-connected and water molecules as three-connected nodes. The carboxyl groups of the cation are hydrogen bonded to the water molecule [O...O = 2.5533 (13) A], while the N-H group supports direct bonding to the anion [N...F = 2.7061 (12) A].
在六氟硅酸双（2 - 羧基吡啶鎓）盐（2C₆H₆NO₂⁺·SiF₆²⁻，（I））和六氟硅酸双（2 - 羧基喹啉鎓）二水合物（2C₁₀H₈NO₂⁺·SiF₆²⁻·2H₂O，（II））中，阴离子的硅原子位于晶体学反演中心上。（I）中的主要离子间相互作用通过强N - H...F和O - H...F氢键发生，形成波纹状层，其中[SiF₆]²⁻阴离子作为四连接网络节点，有机阳离子作为其间的简单连接。在（II）中，一组涉及水分子的强N - H...F、O - H...O和O - H...F氢键形成了三维杂配位金红石型框架，其中[SiF₆]²⁻阴离子作为六连接节点，水分子作为三连接节点。阳离子的羧基与水分子形成氢键[O...O = 2.5533 (13) Å]，而N - H基团支持与阴离子直接键合[N...F = 2.7061 (12) Å]。
Zotero 插件