scholarly journals The layered crystal structure of bis(theophyllinium) hexachloridostannate (IV), C14H18N8O8SnCl6

Author(s):  
Guido J. Reiss ◽  
Maik Wyshusek

Abstract C14H18N8O8SnCl6, monoclinic, P21/n (no. 14), a = 8.1810(2) Å, b = 12.6195(3) Å, c = 11.3811(2) Å, β = 90.258(2)°, Z = 2, V = 1174.97(5) Å3, R gt(F) = 0.0266, wR ref = 0.0620, T = 290 K.

2019 ◽  
Vol 34 (1) ◽  
pp. 50-58
Author(s):  
James A. Kaduk ◽  
Nicholas C. Boaz ◽  
Amy M. Gindhart ◽  
Thomas N. Blanton

The crystal structure of oxybutynin hydrochloride hemihydrate has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional techniques. Oxybutynin hydrochloride hemihydrate crystallizes in space group I2/a (#15) with a = 14.57266(8), b = 8.18550(6), c = 37.16842(26) Å, β = 91.8708(4)°, V = 4421.25(7) Å3, and Z = 8. The compound exhibits X-ray-induced photoreduction of the triple bond. Prominent in the layered crystal structure is the N–H⋅⋅⋅Cl hydrogen bond between the cation and anion, as well as O–H⋅⋅⋅Cl hydrogen bonds from the water molecule and hydroxyl group of the oxybutynin cation. C–H⋅⋅⋅Cl hydrogen bonds also contribute to the crystal energy, and help determine the conformation of the cation. The powder pattern is included in the Powder Diffraction File™ as entry 00-068-1305.


RSC Advances ◽  
2021 ◽  
Vol 11 (39) ◽  
pp. 24456-24465
Author(s):  
Rapaka S. C. Bose ◽  
K. Ramesh

Polycrystalline p-type Sb1.5Bi0.5Te3 (SBT) and n-type Bi2Te2.7Se0.3 (BTS) compounds possessing layered crystal structure show anisotropic electronic and thermal transport properties.


2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Sviatoslav Baranets ◽  
Alexander Ovchinnikov ◽  
Svilen Bobev

Abstract A new quaternary germanide has been synthesized and structurally characterized. BaLi2Cd2Ge2 adopts the rhombohedral CaCu4P2 structure type (Pearson code hR7; space group R 3 ‾ m $R‾{3}m$ , Z = 3) with unit cell parameters a = 4.5929(6) and c = 26.119(5) Å. Structure refinements from single-crystal X-ray diffraction data demonstrate that the layered crystal structure can be regarded as an ordered quaternary variant of the ternary archetype; structural parallels to layered pnictides and binary germanides can also be drawn. The layered crystal structure is characterized by the absence of direct Ge–Ge and Cd–Cd homoatomic bonds, which suggests that BaLi2Cd2Ge2 should be classified as a Zintl phase, according to the formulation (Ba2+)(Li+)2(Cd2+)2(Ge4−)2. Electronic structure calculations show that the Fermi level crosses a distinct peak in the DOS, although the presence of an electronic band gap or a dip in the electronic density of states at the Fermi level is expected based on the electron partitioning.


2019 ◽  
Vol 7 (17) ◽  
pp. 10552-10560 ◽  
Author(s):  
Raj Kumar Gogoi ◽  
Arindom Bikash Neog ◽  
Tukhar Jyoti Konch ◽  
Neelam Sarmah ◽  
Kalyan Raidongia

The reactive surface and layered crystal structure of vanadium pentoxide (V2O5) are exploited here to prepare a two-dimensional (2D) ion pump that transports ions against their concentration gradient.


2017 ◽  
Vol 5 (19) ◽  
pp. 9060-9066 ◽  
Author(s):  
Fei Wang ◽  
Yanhao Yu ◽  
Xin Yin ◽  
Peng Tian ◽  
Xudong Wang

Large area synthesis of two dimensional (2D) nanomaterials with a non-layered crystal structure remains a grand challenge.


2009 ◽  
Vol 6 (10) ◽  
pp. 2190-2194 ◽  
Author(s):  
Jesús A. Blanco ◽  
Sergei A. Khainakov ◽  
Olena Khainakova ◽  
José R. García ◽  
S. García-Granda

2002 ◽  
Vol 52 (S1) ◽  
pp. A289-A292
Author(s):  
M. Kajňaková ◽  
A. Orendáčová ◽  
M. Orendáč ◽  
J. Černák ◽  
A. Vlček ◽  
...  

2000 ◽  
Vol 2000.3 (0) ◽  
pp. 503-504
Author(s):  
Keiju MATSUZAKI ◽  
Shojiro MIYAKE ◽  
Jongduk KIM

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