scholarly journals Crystal Structure Determination of Cyclohexane-1,4-dione from Three-dimensional Data Obtained at Room Temperature.

1964 ◽  
Vol 18 ◽  
pp. 923-931 ◽  
Author(s):  
P. Groth ◽  
O. Hassel ◽  
B. Thorkilsen ◽  
Hans Halvarson ◽  
Lennart Nilsson
Keyword(s):  
Crystal Structure ◽  
Structure Determination ◽  
Room Temperature ◽  
Three Dimensional ◽  
Crystal Structure Determination

First crystal-structure determination of natural lansfordite, MgCO3·5H2O

2017 ◽  
Vol 81 (5) ◽  
pp. 1063-1071 ◽  
Author(s):  
Fabrizio Nestola ◽  
Anatoly V. Kasatkin ◽  
Sergey S. Potapov ◽  
Olga YA. Chervyatsova ◽  
Arianna Lanza
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Single Crystal ◽  
Structure Determination ◽  
Room Temperature ◽  
Crystal Structure Determination ◽  
Hydrogen Atoms ◽  
Synthetic Analogues ◽  
X Ray

AbstractThis study presents the first crystal-structure determination of natural MgCO3·5H2O, mineral lansfordite, in comparison with previous structural works performed on synthetic analogues. A new prototype single-crystal X-ray diffractometer allowed us to measure an extremely small crystal (i.e. 0.020 mm × 0.010 mm × 0.005 mm) and refine anisotropically all non-hydrogen atoms in the structure and provide a robust hydrogen-bond arrangement. Our new data confirm that natural lansfordite can be stable for several months at room temperature, in contrast with previous works, which reported that such a mineral could be stable only below 10°C.

Synthesis and Single Crystal Structure Determination of Bis(carbido)bis(μ-diphenylphosphido)heptadecacarbonyloctaruthenium-Dichloromethane (1/1), Ru8(μ6-C)(μ5-C)(μ-PPh2)2(CO)17.CH2Cl2

1993 ◽  
Vol 46 (11) ◽  
pp. 1811 ◽  
Author(s):  
CJ Adams ◽  
MI Bruce ◽  
BW Skelton ◽  
AH White
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Structure Determination ◽  
Title Compound ◽  
Room Temperature ◽  
Single Crystal Structure ◽  
Crystal Structure Determination ◽  
Triangular Face ◽  
X Ray

The synthesis and room-temperature single-crystal X-ray structure determination of the title compound are recorded. Crystals are monoclinic, P 21/c, a 14.43(2), b 18.39(1), c 23.64(3) Ǻ, β 123.16(7)°, Z = 4, isostructural with the recently described Fe3Ru5 analogue; R was 0.048 for 6892 'observed' data [I > 3σ(I)]. The cluster is one of the few containing separated carbide ligands within a polyhedral metal skeleton, consisting of an Ru5C square pyramid and an Ru6C octahedron sharing a triangular face, with two PPh2 groups bridging opposite Ru-Ru vectors in each polyhedron.

Synthese und Kristallstrukturbestimmung von Additionsverbindungen aus Alkyldimethylbromsilanen und N-Trimethylsilylimidazol/Syntheses and Crystal Structure Determination of Addition Compounds of Alkyldimethylbromosilanes and N-Trimethylsilylimidazole

1997 ◽  
Vol 52 (12) ◽  
pp. 1491-1496 ◽  
Author(s):  
Karl Hensen ◽  
Frank Gebhardta ◽  
Michael Bolteb
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Structure Determination ◽  
Room Temperature ◽  
Crystal Structure Determination

Abstract The bromosilanes RMe2SiBr (R = Me, Et, n-Pr and i-Pr) form ionic 1:1-compounds with N-trimethylsilylimidazole (NTMSI), stable at room temperature. Crystals of the compounds with R = Et, n-Pr and i-Pr are obtained by sublimation. From the product of the reaction of 1,1-dibromosilacyclopentane with NTMSI single crystals of N,N′-bis(trimethylsilyl)imidazolium-bromide (R = Me) were obtained. In the new adducts both silicon atoms are tetracoordinated.

Synthese und Kristallstrukturbestimmung von Silicium-Komplexen der Koordinationszahl sechs mit Dimethylpyridinen/ Syntheses and Crystal Structure Determination of Hexacoordinated Silicon-Complexes with Dimethylpyridines

2000 ◽  
Vol 55 (10) ◽  
pp. 901-906 ◽  
Author(s):  
Karl Hensena ◽  
Markus Kettner ◽  
Thorsten Stumpf ◽  
Michael Bolte
Keyword(s):  
Crystal Structure ◽  
Structure Analysis ◽  
Silicon Atom ◽  
Structure Determination ◽  
Room Temperature ◽  
Crystal Structure Determination ◽  
Aprotic Solvents ◽  
X Ray

Abstract Trichlorosilane, HSiCl3, forms with 3,4-dimethylpyridine in aprotic solvents a crystalline l:2-compound which is stable at room temperature and readily soluble in CHCl3. Colourless crystals of the dicationic complex, [H2Si(3,4-dimethylpyridine)4]2+ 2Cl- · 6 CHCl3 (verified by X-ray structure analysis) are obtained by dismutation of HSiCl3(3,4-dimethylpyridine)2 in CHCl3 within one week at room temperature.29Si NM R indicates that SiCl4 is generated as a second product. H2SiCl2 with 2,4-dimethylpyridine as well as MeHSiBr2 with 3,5-dimethylpyridine in aprotic solvents form 1:2-compounds stable at room temperature. X-ray structure analyses in both cases establish neutral-complexes with a hexa-coordinated silicon atom

Vom Fluorsilan zum Siloxan — 1,3-Silylgruppenwanderung am Si3CSiO-Gerüst/ From a Fluorosilane to a Siloxane — 1,3-Migration of Silyl Groups in the Si3CSiO System

1985 ◽  
Vol 40 (8) ◽  
pp. 1023-1028 ◽  
Author(s):  
Uwe Klingebiel ◽  
Sabine Pohlmann ◽  
Lutz Skoda ◽  
Cornelia Lensch ◽  
George M. Sheldrick
Keyword(s):  
Crystal Structure ◽  
Structure Determination ◽  
Crystal Structure Determination ◽  
Silyl Groups ◽  
Trimethylsilyl Groups

AbstractThe nature of the products which are formed in the reaction of tris(trimethylsilyl)Methylfluorosilanes (Me3Si)3C -SiF2R with KOH depends on the bulkiness of the substituents R. The condensed siloxane is obtained for R = F . The crystal structure determination of this siloxane (Me3Si)3C -SiF2-O -SiF2-C (SiMe3)3 shows that the Si -O - Si unit is linear. A fluorosilanol as well as a siloxane could be isolated for R = Me. 1,3-Migration of one or two trimethylsilyl groups from the carbon to the oxygen takes place for R = phenyl, rm-butyl or silylamine, with formation of siloxanes which are isomeres o f the expected silanols.

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