Encapsulation of Halocarbons in a Tetrahedral Anion Cage

2015 ◽  
Vol 54 (30) ◽  
pp. 8658-8661 ◽  
Author(s):  
Dong Yang ◽  
Jie Zhao ◽  
Yanxia Zhao ◽  
Yibo Lei ◽  
Liping Cao ◽  
...  
Keyword(s):  
Tetrahedral Anion

Sn94– Zintl Ions as Reactive Precursor for Neat Solids: Syntheses and Crystal Structures of Rb4[SnTe4], KxCs4–x[SnTe4], and KxCs10–x[Sn4Te12]

2009 ◽  
Vol 64 (11-12) ◽  
pp. 1319-1324 ◽  
Author(s):  
Jian-Qiang Wang ◽  
Viktor Hlukhyy ◽  
Thomas F. Fässler
Keyword(s):  
Single Crystal ◽  
Crystal Structures ◽  
X Ray Diffraction ◽  
Compound K ◽  
Reaction Conditions ◽  
Elemental Tellurium ◽  
X Ray ◽  
Zintl Ions ◽  
Tetrahedral Anion

The reactions of Zintl ions Sn94− formed in ethylenediamine solutions of K2Cs2Sn9 and Rb4Sn9 with elemental tellurium have been investigated. Addition of elemental tellurium to the filtrates of these solutions leads - depending on the reaction conditions - to four different products: Compounds K0.36(1)Cs3.64(1)[SnTe4] (1) and Rb4[SnTe4] (2) contain the tetrahedral anion [SnTe4]4−, and Cs4[Sn2Te7] (3) features the anion [Te2Sn(μ-Te)(μ-Te2)SnTe2]4−, whereas a novel Zintl anion [Sn4Te12]10− is present in compound K0.44(1)Cs9.56(1)[Sn4Te12] (4). Compounds 1, 2 and 4 have been structurally characterized by single-crystal X-ray diffraction

scholarly journals Crystal structure of bis(4-acetylanilinium) tetrachloridomercurate(II)

2015 ◽  
Vol 71 (12) ◽  
pp. m236-m237
Author(s):  
Manickam Thairiyaraja ◽  
Arumugam Elangovan ◽  
Ganesh Arivazhagan ◽  
Kuthambalam Selvaraju ◽  
Subbiah Thamotharan
Keyword(s):  
Point Group ◽  
Three Dimensional ◽  
Group Symmetry ◽  
Dimensional Network ◽  
Centroid Distance ◽  
Bonding Interaction ◽  
Benzene Rings ◽  
Π Stacking Interaction ◽  
Considerable Distortion ◽  
Tetrahedral Anion

The structure of the title salt, (C8H10NO)2[HgCl4], is isotypic with that of the cuprate(II) and cobaltate(II) analogues. The asymmetric unit contains one 4-acetylanilinium cation and one half of a tetrachloridomercurate(II) anion (point group symmetrym). The Hg—Cl distances are in the range 2.4308 (7)–2.5244 (11) Å and the Cl—Hg—Cl angles in the range of 104.66 (2)–122.94 (4)°, indicating a considerable distortion of the tetrahedral anion. In the crystal, cations are linked by an intermolecular N—H...O hydrogen-bonding interaction, leading to aC(8) chain motif with the chains extending parallel to thebaxis. There is also a π–π stacking interaction with a centroid-to-centroid distance of 3.735 (2) Å between neighbouring benzene rings along this direction. The anions lie between the chains and interact with the cations through intermolecular N—H...Cl hydrogen bonds, leading to the formation of a three-dimensional network structure.

Infrared and Raman Study of the Anion-Donor Interactions in Tetrahedral Anion (TMTSF)2 X and (Tmttf)2 X Salts

1985 ◽  
Vol 119 (1) ◽  
pp. 211-220 ◽  
Author(s):  
R. Bozio ◽  
C. Pecile ◽  
J. C. Scott ◽  
E. M. Engler
Keyword(s):  
Raman Study ◽  
Tetrahedral Anion

Trivalent Tetrahedral Anion Template: A 26-Nucleus Silver Alkynyl Cluster Encapsulating Vanadate

2019 ◽  
Vol 58 (9) ◽  
pp. 5397-5400 ◽  
Author(s):  
Jing-Zhe Li ◽  
Fahime Bigdeli ◽  
Xue-Mei Gao ◽  
Ru Wang ◽  
Xue-Wen Wei ◽  
...  
Keyword(s):  
Tetrahedral Anion

scholarly journals Crystal structure of bis(4-acetylanilinium) tetrachloridocobaltate(II)

2015 ◽  
Vol 71 (12) ◽  
pp. m221-m222 ◽  
Author(s):  
Manickam Thairiyaraja ◽  
Arumugam Elangovan ◽  
Ramasamy Shanmugam ◽  
Kuthambalam Selvaraju ◽  
Subbiah Thamotharan
Keyword(s):  
Hydrogen Bonding ◽  
Three Dimensional ◽  
Mirror Plane ◽  
Stacking Interactions ◽  
Asymmetric Unit ◽  
Hydrogen Bonding Interactions ◽  
Dimensional Network ◽  
Centroid Distance ◽  
Benzene Rings ◽  
Tetrahedral Anion

The structure of the title salt, (C8H10NO)2[CoCl4], is isotypic with the analogous cuprate(II) structure. The asymmetric unit contains one 4-acetylanilinium cation and one half of a tetrachloridocobaltate(II) anion for which the CoIIatom and two Cl−ligands lie on a mirror plane. The Co—Cl distances in the distorted tetrahedral anion range from 2.2519 (6) to 2.2954 (9) Å and the Cl—Co—Cl angles range from 106.53 (2) to 110.81 (4)°. In the crystal, cations are self-assembled by intermolecular N—H...O hydrogen-bonding interactions, leading to aC(8) chain motif with the chains running parallel to thebaxis. π–π stacking interactions between benzene rings, with a centroid-to-centroid distance of 3.709 Å, are also observed along this direction. The CoCl42−anions are sandwiched between the cationic chains and interact with each other through intermolecular N—H...Cl hydrogen-bonding interactions, forming a three-dimensional network structure.

Peripheral Templation-Modulated Interconversion between an A4 L6 Tetrahedral Anion Cage and A2 L3 Triple Helicate with Guest Capture/Release

2018 ◽  
Vol 130 (7) ◽  
pp. 1869-1873 ◽  
Author(s):  
Xuemin Bai ◽  
Chuandong Jia ◽  
Yanxia Zhao ◽  
Dong Yang ◽  
Shi-Cheng Wang ◽  
...  
Keyword(s):  
Tetrahedral Anion ◽  
Triple Helicate

scholarly journals Flexible supramolecular ring-like host for various tetrahedral anion guests

2007 ◽  
Vol 63 (a1) ◽  
pp. s173-s173
Author(s):  
D. Matković-Čalogović ◽  
K. Užarević ◽  
I. Đilović ◽  
M. Cindrić
Keyword(s):  
Tetrahedral Anion

scholarly journals Sulphur and Molybdenum Incorporation at the Calcite-Water Interface: Insights from Ab Initio Molecular Dynamics

2021 ◽  
Author(s):  
Scott D. Midgley ◽  
Devis Di Tommaso ◽  
Dominik Fleitmann ◽  
Ricardo Grau-Crespo
Keyword(s):  
Molecular Dynamics ◽  
Calcium Carbonate ◽  
Ab Initio ◽  
Mineral Water ◽  
Ab Initio Molecular Dynamics ◽  
Water Interface ◽  
Trace Impurities ◽  
Tetrahedral Oxyanions ◽  
Element Bearing ◽  
Tetrahedral Anion

<p>Sulphur and molybdenum trace impurities in speleothems (stalagmites and stalactites) can provide long and continuous records of volcanic activity, which are important for past climatic and environmental reconstructions. However, the chemistry governing the incorporation of the trace-element bearing species into the calcium carbonate phases forming speleothems is not well understood. Our previous work has shown that substitution as tetrahedral oxyanions [<i>X</i>O<sub>4</sub>]<sup>2-</sup> (<i>X</i>=S, Mo) replacing [CO<sub>3</sub>]<sup>2-</sup> in CaCO<sub>3</sub> bulk phases (except perhaps for vaterite) is thermodynamically unfavourable with respect to the formation of competing phases, due to the larger size and different shape of the [<i>X</i>O<sub>4</sub>]<sup>2- </sup>tetrahedral anions in comparison with the flat [CO<sub>3</sub>]<sup>2-</sup> anions, which implied that most of the incorporation would happen at the surface rather than the bulk of the mineral. Here we present an ab initio molecular dynamics study exploring the incorporation of these impurities at the mineral-water interface. We show that the oxyanions substitution at the aqueous calcite (10.4) surface is clearly favoured over bulk incorporation, due to the lower structural strain on the calcium carbonate solid. Incorporation at surface step sites is even more favourable for both oxyanions, thanks to the additional interface space afforded by the surface line defect to accommodate the tetrahedral anion. Differences between sulphate and molybdate substitution can be mostly explained by the size of the anions. The molybdate oxyanion is more difficult to incorporate in the calcite bulk than the smaller sulphate oxyanion. However, when molybdate is substituted at the surface, the elastic cost is avoided because the oxyanion protrudes out of the surface and gains stability via the interaction with water at the interface, which in balance results in more favourable surface substitution for molybdate than for sulphate. The detailed molecular-level insights provided by our calculations will be useful to understand the chemical basis of S- and Mo-based speleothem records.</p>

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