The roles of “ammonium” and “hydrogen-bond” protons in single crystals of the superionic conductor NH4HSeO4 by 1H NMR relaxation

2008 ◽  
Vol 69 (10) ◽  
pp. 2360-2365 ◽  
Author(s):  
Ae Ran Lim ◽  
Seo Won Jang ◽  
Jin-Hae Chang
Keyword(s):  
Hydrogen Bond ◽  
Single Crystals ◽  
1H Nmr ◽  
Nmr Relaxation ◽  
Superionic Conductor

1H-NMR RELAXATION STUDIES ON THE NATURE OF THE SEMICONDUCTING STATE OF (TMTTF)2Br AND (TMTTF)2PF6: MAGNETISM

1983 ◽  
Vol 44 (C3) ◽  
pp. C3-1095-C3-1097
Author(s):  
T. Takahashi ◽  
F. Creuzet ◽  
D. Jérôme ◽  
J. M. Fabre
Keyword(s):  
1H Nmr ◽  
Nmr Relaxation ◽  
Relaxation Studies

Selective 1H-NMR relaxation investigations of membrane-bound drugs in vitro

1990 ◽  
Vol 36 (3) ◽  
pp. 209-213 ◽  
Author(s):  
E. Gaggelli ◽  
T. Di Perri ◽  
A. Orrico ◽  
P.L. Capecchi ◽  
F.Laghi Pasini ◽  
...  
Keyword(s):  
1H Nmr ◽  
Nmr Relaxation ◽  
Membrane Bound

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.

Dipolar spectral densities from off-resonance 1H NMR relaxation measurements

1995 ◽  
Vol 233 (5-6) ◽  
pp. 545-549 ◽  
Author(s):  
H Desvaux ◽  
P Berthault ◽  
N Birlirakis
Keyword(s):  
1H Nmr ◽  
Nmr Relaxation ◽  
Spectral Densities ◽  
Relaxation Measurements

1H-NMR relaxation rate in (DMe-DCNQI)2Cu and (DMeO-DCNQI)2Cu

1991 ◽  
Vol 42 (1-2) ◽  
pp. 1843-1846 ◽  
Author(s):  
K. Kanoda ◽  
T. Tamura ◽  
T. Ohyama ◽  
T. Takahashi ◽  
R. Kato ◽  
...  
Keyword(s):  
Relaxation Rate ◽  
1H Nmr ◽  
Nmr Relaxation
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