NMR studies on single crystals of H2. III. Dynamic effects

1980 ◽  
Vol 40 (1-2) ◽  
pp. 187-205 ◽  
Author(s):  
S. Washburn ◽  
R. Schweizer ◽  
H. Meyer
Keyword(s):  
Single Crystals ◽  
Dynamic Effects ◽  
Nmr Studies

NMR studies on single crystals of H2: IV. The HD impurity spectrum

1981 ◽  
Vol 45 (1-2) ◽  
pp. 167-188 ◽  
Author(s):  
S. Washburn ◽  
R. Schweizer ◽  
H. Meyer
Keyword(s):  
Single Crystals ◽  
Nmr Studies ◽  
Impurity Spectrum

7Li and 14N NMR studies of phase II–III transition in LiNH4SO4 single crystals

2016 ◽  
Vol 247 ◽  
pp. 23-26
Author(s):  
Ae Ran Lim
Keyword(s):  
Single Crystals ◽  
Phase Ii ◽  
Nmr Studies ◽  
14N Nmr

A structural study of (1RS,2SR,3RS,4SR,5RS)-2,4-dibenzoyl-1,3,5-triphenylcyclohexan-1-ol chloroform hemisolvate and (1RS,2SR,3RS,4SR,5RS)-2,4-dibenzoyl-1-phenyl-3,5-bis(2-methoxyphenyl)cyclohexan-1-ol

2015 ◽  
Vol 71 (6) ◽  
pp. 491-498 ◽  
Author(s):  
Mikhail E. Minyaev ◽  
Dmitrii M. Roitershtein ◽  
Ilya E. Nifant'ev ◽  
Ivan V. Ananyev ◽  
Tatyana V. Minyaeva ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Single Crystals ◽  
Structural Study ◽  
Chair Conformation ◽  
Cyclohexane Ring ◽  
Nmr Studies ◽  
Acta Cryst

(1RS,2SR,3RS,4SR,5RS)-2,4-Dibenzoyl-1,3,5-triphenylcyclohexan-1-ol or (4-hydroxy-2,4,6-triphenylcyclohexane-1,3-diyl)bis(phenylmethanone), C38H32O3, (1), is formed as a by-product in the NaOH-catalyzed synthesis of 1,3,5-triphenylpentane-1,5-dione from acetophenone and benzaldehyde. Single crystals of the chloroform hemisolvate, C38H32O3·0.5CHCl3, were grown from chloroform. The structure has triclinic (P-1) symmetry. One diastereomer [as a pair of (1RS,2SR,3RS,4SR,5RS)-enantiomers] of (1) has been found in the crystal structure and confirmed by NMR studies. The dichoromethane hemisolvate has been reported previously [Zhanget al.(2007).Acta Cryst.E63, o4652]. (1RS,2SR,3RS,4SR,5RS)-2,4-Dibenzoyl-3,5-bis(2-methoxyphenyl)-1-phenylcyclohexan-1-ol or [4-hydroxy-2,6-bis(2-methoxyphenyl)-4-phenylcyclohexane-1,3-diyl]bis(phenylmethanone), C40H36O5, (2), is also formed as a by-product, under the same conditions, from acetophenone and 2-methoxybenzaldehyde. Crystals of (2) have been grown from chloroform. The structure has orthorhombic (Pca21) symmetry. A diastereomer of (2) possesses the same configuration as (1). In both structures, the cyclohexane ring adopts a chair conformation with all bulky groups (benzoyl, phenyl and 2-methoxyphenyl) in equatorial positions. The molecules of (1) and (2) both display one intramolecular O—H...O hydrogen bond.

Determination of 31P chemical shielding tensors from NMR studies on single crystals of chlorotris(triphenylphosphine) rhodium(I)

1985 ◽  
Vol 115 (1) ◽  
pp. 19-23 ◽  
Author(s):  
A. Naito ◽  
D.L. Sastry ◽  
C.A. McDowell
Keyword(s):  
Single Crystals ◽  
Chemical Shielding ◽  
Nmr Studies ◽  
Shielding Tensors

NMR studies of single crystals of H2: II. The spectrum of isolated ortho-H2 pairs

1979 ◽  
Vol 37 (3-4) ◽  
pp. 309-341 ◽  
Author(s):  
R. Schweizer ◽  
S. Washburn ◽  
H. Meyer ◽  
A. B. Harris
Keyword(s):  
Single Crystals ◽  
Nmr Studies

NMR studies of single crystals of the topological insulator Bi2Te3 at low temperatures

2017 ◽  
Vol 59 (5) ◽  
pp. 855-859 ◽  
Author(s):  
A. O. Antonenko ◽  
E. V. Charnaya ◽  
D. Yu. Nefedov ◽  
D. Yu. Podorozhkin ◽  
A. V. Uskov ◽  
...  
Keyword(s):  
Single Crystals ◽  
Topological Insulator ◽  
Low Temperatures ◽  
Nmr Studies

NMR studies of diffusion anisotropy in metal hydride single crystals

1991 ◽  
Vol 172-174 ◽  
pp. 603-610 ◽  
Author(s):  
H.C. Hoke ◽  
H.E. Schone ◽  
C.A. Sholl ◽  
S.P. Usher ◽  
R.G. Barnes ◽  
...  
Keyword(s):  
Single Crystals ◽  
Metal Hydride ◽  
Diffusion Anisotropy ◽  
Nmr Studies

Synthesis and dynamic NMR studies of novel hydantoin and thiohydantoin derivatives. Crystal structure of diethyl 2-(4,4-diaryl-2,5-dioxoimidazolidin-1-yl) fumarate and diethyl 2-(4,4-diaryl-2-mercapto-5-oxo-4,5-dihydro-1H-imidazol-1-yl)fumarate

2017 ◽  
Vol 41 (5) ◽  
pp. 309-313
Author(s):  
Mohammad M. Ghanbari ◽  
Marzieh Jamali ◽  
Gyula Batta ◽  
Attila C. Bényei
Keyword(s):  
Imidazole Ring ◽  
Rotational Energy ◽  
Dynamic Effects ◽  
X Ray Diffraction ◽  
Phosphorus Ylides ◽  
Nmr Studies ◽  
X Ray ◽  
Dialkyl Acetylenedicarboxylates ◽  
Rotational Isomers ◽  
Single Bonds

The reaction of stoichiometric amounts of dialkyl acetylenedicarboxylates with triphenylphosphine in the presence of hydantoins or thiohydantoins afforded stable crystalline phosphorus ylides. These compounds undergo smooth elimination of PPh3 to produce dialkyl 2-(4,4-diaryl-2,5-dioxoimidazolidin-1-yl)fumarate, 4 or dialkyl 2-(4,4-diaryl-2-mercapto-5-oxo-4,5-dihydro-1 H-imidazol-1-yl)fumarate, 7. Single crystal X-ray diffraction study on 4b and 7b proved the structures unambiguously with C=O and SH functionality at the 2-position of the imidazole ring, respectively. Dynamic effects were observed in the NMR spectra of these compounds and were attributed to restricted rotation around the carbon-nitrogen single bonds. Rotational energy barrier (Δ G#) for their interconversion process of rotational isomers equals to (53.6 and 17.2) ± 2 kcal mol−1.

NMR studies of single crystals of H2. V. NMR anisotropy and order parameter distribution ofX (ortho)?0.55

1982 ◽  
Vol 49 (1-2) ◽  
pp. 101-122 ◽  
Author(s):  
S. Washburn ◽  
M. Calkins ◽  
H. Meyer ◽  
A. B. Harris
Keyword(s):  
Single Crystals ◽  
Order Parameter ◽  
Parameter Distribution ◽  
Nmr Studies
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