The trans-[py2AlCl4] - (‘py’ = pyridine) Anion, Structurally Characterized in Two Pyridinium Salts

2004 ◽  
Vol 57 (5) ◽  
pp. 503 ◽  
Author(s):  
Peter C. Junk ◽  
Colin L. Raston ◽  
Brian W. Skelton ◽  
Allan H. White
Keyword(s):  
Crystal Structure ◽  
Low Temperature ◽  
Single Crystal ◽  
Metal Atom ◽  
Single Crystal Structure ◽  
Pyridinium Salts ◽  
Structure Determinations

Salts of the trans-[py2AlCl4]– anion have been structurally characterized by ‘low’-temperature single crystal structure determinations of the adducts 2AlCl3 · 2HCl · 4py {=(pyH)2[(py)2AlCl4](AlCl4)}, and 2AlCl3 · 3HCl · 7py {=(pyH)3[(py)2AlCl4]2Cl}, extending the structurally characterized members of the array [(py)nAlCl(6–n)](n–3)± with ‘octahedral’ six-coordinate metal atom geometries, the members for n = 3 (mer) and 4 (trans) having been previously characterized.

The crystal structure of AlAsO4 at high pressure

1991 ◽  
Vol 194 (3-4) ◽  
Author(s):  
H. Sowa
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Low Temperature ◽  
Single Crystal ◽  
Single Crystal Structure ◽  
Space Groups ◽  
Structure Determinations ◽  
Oxygen Anions

AbstractSingle-crystal structure determinations of the low-temperature quartz modification of AlAsOThe refinements were carried out in space groupsThe high pressure behaviour of AlAsOFrom the shortening of intertetrahedral O – O distances and the changes of the shape of the Dirichlet domains of the oxygen anions, it can be concluded that the oxygen packing changes with increasing pressure in the direction of an arrangement corresponding to a cubic body-centered lattice. As in the case of SiO

High‐pressure single‐crystal structure determinations for ruby up to 90 kbar using an automatic diffractometer

1978 ◽  
Vol 49 (8) ◽  
pp. 4411-4416 ◽  
Author(s):  
H. d’Amour ◽  
D. Schiferl ◽  
W. Denner ◽  
Heinz Schulz ◽  
W. B. Holzapfel
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Single Crystal ◽  
Single Crystal Structure ◽  
Structure Determinations ◽  
Automatic Diffractometer

Lewis-Base Adducts of Main Group 1 Metal Compounds. X. Lithium Bromide and Iodide Complexes With Acetonitrile (1 : 2, 1 : 4 Respectively)

1989 ◽  
Vol 42 (1) ◽  
pp. 201 ◽  
Author(s):  
CL Raston ◽  
CR Whitaker ◽  
AH White
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Lithium Bromide ◽  
Main Group ◽  
Lewis Base ◽  
Single Crystal Structure ◽  
Metal Compounds ◽  
Structure Determinations ◽  
Group 1

Although only sparingly soluble in acetonitrile, lithium(1) bromide and iodide crystallize as acetonitrile adducts, structurally characterized as LiX/MeCN 1 : 2 and 1 : 4 respectively by single-crystal structure determinations. The bromide is a �,�′-dibromo-bridged dimer , ( MeCN )2LiBr2Li( NCMe )2)] (monoclinic, P21/n, a 7.624(2), b 12.61 2(2), c 8.047(3) � , β 98.94(3)°p; Z 2 dimers; R 0.038 for No 1081 'observed' reflections); Li-Br, N 2.534(7), 2.492(8); 2.031(9), 2.047(8) � respectively, with Li…Li, 3.17(1); Br…Br, 3.8989(9) � respectively. The iodide is ionic, [Li( NCMe )4]+1- (orthorhombic, P21221, a 20.66(1), b 12.208(6), c 8.4296) �, Z 6; R 0.062 for No 866).

X-ray and neutron diffraction investigation at 298 K of NH4I · NH3 and ND4I · ND3 containing the cation H3N – H … NH3+ and D3N – D … ND3+

1992 ◽  
Vol 200 (3-4) ◽  
Author(s):  
H. J. Berthold ◽  
E. Vonholdt ◽  
R. Wartchow ◽  
T. Vogt
Keyword(s):  
Crystal Structure ◽  
Low Temperature ◽  
Neutron Diffraction ◽  
Single Crystal ◽  
Structure Analysis ◽  
Crystal Structure Analysis ◽  
Single Crystal Structure ◽  
X Ray ◽  
Single Crystal Structure Analysis

AbstractNHA single crystal structure analysis of NThe deuterated compound NThe structures of the ordered low temperature phases will be reported separately.

scholarly journals Potential photoacid generators based on oxime sulfonates

2019 ◽  
Vol 43 (1-2) ◽  
pp. 26-33
Author(s):  
M John Plater ◽  
William TA Harrison ◽  
Ross Killah
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Single Crystal Structure ◽  
Fragmentation Pathways ◽  
X Ray ◽  
Photoacid Generators ◽  
Structure Determinations ◽  
Secondary Reactions

The bis-oxime of acenaphthenequinone and the mono-oxime of benzil have been sulfonated by reaction with 4-methylbenzenesulfonyl chloride and propylsulfonyl chloride. The four sulfonated oximes were characterised by X-ray single-crystal structure determinations. Some photochemical decompositions were studied using a 6-W 254-nm immersion well lamp in dichloromethane. The 4-methylbenzenesulfonate bis-oxime of acenaphthenequinone and the 4-methylbenzenesulfonate mono-oxime of benzil both give 4-methylbenzenesulfonic acid upon irradiation but not 4-methylbenzenesulfinic acid. Fragmentation pathways are discussed. The possible use of these compounds as photoacid generators in polymer resists and the role of secondary reactions to liberate acid is discussed.

scholarly journals Single-crystal structure ofHoBaCo4O7at ambient conditions, at low temperature, and at high pressure

2009 ◽  
Vol 79 (6) ◽  
Author(s):  
Erick A. Juarez-Arellano ◽  
Alexandra Friedrich ◽  
Dan J. Wilson ◽  
Leonore Wiehl ◽  
Wolfgang Morgenroth ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Low Temperature ◽  
Single Crystal ◽  
Single Crystal Structure ◽  
Ambient Conditions
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