Production and Isomeric Distribution of Xanthylium Cation Pigments and Their Precursors in Wine-like Conditions: Impact of Cu(II), Fe(II), Fe(III), Mn(II), Zn(II), and Al(III)

2017 ◽  
Vol 65 (11) ◽  
pp. 2414-2425 ◽  
Author(s):  
Anque Guo ◽  
Nikolaos Kontoudakis ◽  
Geoffrey R. Scollary ◽  
Andrew C. Clark
Keyword(s):  
Isomeric Distribution

Synthese und Eigenschaften von 3,6-Diorgano-3,6-dithio-1,2,4,5,3,6-tetrathiadiphosphorinanen; eine neue Möglichkeit zur Knüpfung von S—S-Bindungen / Synthesis and Properties of 3,6-D iorgano-3,6-dithio-1,2,4,5,3,6-tetrathiadiphosphorinanes; a New Possibility of Forming S—S Bonds

1987 ◽  
Vol 42 (10) ◽  
pp. 1263-1267 ◽  
Author(s):  
Josef Hahn ◽  
Tina Nataniel
Keyword(s):  
Conformational Analysis ◽  
Crystalline State ◽  
Acid Anhydride ◽  
Boat Conformation ◽  
Trans Orientation ◽  
Isomeric Distribution ◽  
Phosphorus Heterocycles ◽  
High Yields ◽  
Dithiophosphonic Acid ◽  
Twist Boat

Abstract The six-membered sulfur-phosphorus heterocycles 3,6-diorgano-3,6-dithio-1,2,4,5,3,6-tetrathiadiphosphorinanes (RP(S)S2)2 (R = Me 1a and R = t-Bu 1b ) are formed in high yields from the silyl esters of the corresponding trithiophosphonic acids RP(S)(SSiMe3)2 and dimethylsulfoxide. They are fairly stable in the crystalline state. In solution sulfur elimination occurs, which in the case of l a leads to the formation of 3,5-dimethyl-3,5-dithio-1,2,4,3,5-trithiadiphospholane, MeP(S)S2PMe(S)S (4). Likewise lb decomposes to give the corresponding dithiophosphonic acid anhydride (t-BuP(S)S)2. According to NMR spectroscopic conformational analysis, 1a exists in four isomeric forms: two chair and two twist-boat conformations, which differ in the orientation (cis or trans) of the Me groups. The isomeric distribution indicates that the Me groups prefer the axial positions. As a consequence of steric bulk, 1b is only present in the twist-boat conformation with trans orientation of the t-Bu substituents.

Determination of Isomeric Distribution in Mixedo-andp-Toluenesulfonamides by Ultraviolet Absorption

1959 ◽  
Vol 31 (11) ◽  
pp. 1806-1808 ◽  
Author(s):  
F. N. Stewart ◽  
J. E. Caldwell ◽  
A. F. Ueiner
Keyword(s):  
Ultraviolet Absorption ◽  
Isomeric Distribution

Isomeric Distribution of Conjugated Linoleic Acids (CLA) in the Tissues of Layer Hens Fed a CLA Diet

2003 ◽  
Vol 51 (19) ◽  
pp. 5654-5660 ◽  
Author(s):  
Lin Yang ◽  
Yu Huang ◽  
Han Qing Wang ◽  
Zhen-Yu Chen
Keyword(s):  
Conjugated Linoleic Acids ◽  
Isomeric Distribution ◽  
Layer Hens

Isomeric distribution of monosaccharides in deep eutectic solvents: NMR study

2018 ◽  
Vol 255 ◽  
pp. 244-249 ◽  
Author(s):  
Mengjie Wu ◽  
Wei Zhou ◽  
Christian Marcus Pedersen ◽  
Hui Ma ◽  
Yan Qiao ◽  
...  
Keyword(s):  
Deep Eutectic Solvents ◽  
Nmr Study ◽  
Isomeric Distribution

scholarly journals Microfluidic SAXS Study of Lamellar and Multilamellar Vesicle Phases of Linear Sodium Alkylbenzenesulfonate Surfactant with Intrinsic Isomeric Distribution

Langmuir ◽  
2016 ◽  
Vol 32 (23) ◽  
pp. 5852-5861 ◽  
Author(s):  
Andreas S. Poulos ◽  
Manuela Nania ◽  
Paul Lapham ◽  
Ruhina M. Miller ◽  
Andrew J. Smith ◽  
...  
Keyword(s):  
Multilamellar Vesicle ◽  
Isomeric Distribution
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