scholarly journals Transition and Group IIB Metal Complexes With “Active Aldehyde” Derivatives of Thiamine

1994 ◽  
Vol 1 (2-3) ◽  
pp. 221-231 ◽  
Author(s):  
Maria Louloudi ◽  
Nick Hadjiliadis ◽  
Jean Pierre Laussac ◽  
Robert Bau
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Electronic Spectra ◽  
Nmr Spectra ◽  
Two Dimensional ◽  
Tetrahedral Structure ◽  
The One ◽  
Pyrimidine Moiety ◽  
Derivatives Of ◽  
Cyclohexyl Methyl

The Zn2+, Cd2+, Hg2+, Co2+ and Ni2+ ions produce zwitterionic type complexes with the ligands (L), 2-(α-hydroxy-benzyl)thiamine=HBT and 2-(α-hydroxy-cyclohexyl-methyl)thiamine = HCMT, of the type MLCl3. The ligands are in the S conformation, the metals are bound to N1, of the pyrimidine moiety of thiamine and the complexes have a trigonally distorted tetrahedral structure, as the crystal structure of the complex Zn(HCMT)Cl3 (orthorombic, a=14.4 b=14.1 c=17.4 β=105.6O V=3392A3 R=13.8%), the one and two dimensional H1 nmr spectra of the Zn2+, Cd2+ and Hg2+ complexes and the electronic spectra of the Co2+ and Ni2+ complexes show. A brief review of the previous techniques (structure of the Hg(HBT)Cl3 complex, IR-Raman spectra, C13 nmr in solution and solid state etc) used to characterize these complexes, is also given here and the proper conclusions drawn.

Studies of the neutral trisaccharides of goat (Capra hircus) colostrum and of the one- and two-dimensional 1H and 13C NMR spectra of 6′-N-acetylglucosaminyllactose

1994 ◽  
Vol 262 (2) ◽  
pp. 173-184 ◽  
Author(s):  
Tadasu Urashima ◽  
William A. Bubb ◽  
Michael Messer ◽  
Yuhnagi Tsuji ◽  
Yasuko Taneda
Keyword(s):  
13C Nmr ◽  
Nmr Spectra ◽  
Capra Hircus ◽  
13C Nmr Spectra ◽  
Two Dimensional ◽  
1H And 13C Nmr ◽  
The One

scholarly journals Five sesquiterpenes from the root Aucklandia lappa Decne.

2019 ◽  
pp. 5-11
Author(s):  
Chjuo Fuguan ◽  
Seesregdorj S ◽  
Gerelt-Od Ya
Keyword(s):  
Phenolic Compounds ◽  
Nmr Spectra ◽  
Previous Literature ◽  
Two Dimensional ◽  
Nmr Data ◽  
Nmr Techniques ◽  
The One ◽  
Dehydrocostus Lactone ◽  
First Time

The four sesquiterpenes calameone (1), dehydrocostus lactone (2), aristolone (3), alantolactone (4) and one triterpenoid α-amyrine (5), simple phenolic compounds such as 4-hydroxybenzaldehyde, (6), piceol (7), apocynin (8), dihydroconiferyl (9) and coniferyl (10) have been identified by using the proton and carbon NMR spectra which were isolated from a dichloromethane extract of the roots of Aucklandia lappa Decne. Their structures were established by the one‐and two‐dimensional NMR techniques including DEPT, COSY and HMBC spectroscopy. This work examined proton and carbon NMR data of calameone (1) and aristolone (3) for the first time, which had not yet been fully studied in previous literature. Рүда ургамлын (Aucklandia lappa Decne.) терпент нэгдлийн судалгаа Хураангуй: Рүда ургамлын үндэсний дихлорметаны ханднаас хроматографийн аргуудаар эвдесман хэлбэрийн сесквитерпен каламеон (1), аристолон (3), алантолактон (4), гвяан хэлбэрийн сесквитерпен дегидрокостасын лактон (2), тритерпеноид α-амурин (5) болон энгийн фенолт нэгдэл 4-гидроксибензальдегид (6), пицелол (7), апоцинин (8), дегидрокониферол (9), кониферол (10) зэрэг бодисыг химийн цэвэр байдалтай ялгав. Эдгээр бодисын бүтэц байгуулалтыг нэг болон хоёр хэмжээст ЦСР-ын DEPT, COSY, HMBC спектроскопийн аргаар таньж тодорхойлов. Урьд өмнө каламеон (1), аристолон (3) бодисуудын устөрөгч ба нүүрстөрөгчийн атомуудын химийн шилжилтийн утгуудад оноолт бүрэн хийгдээгүй байсан ба энэ хоёр бодисын оноолтыг гүйцээж хийв. Түлхүүр үг: Терпеноид, сесквитерпент лактон, дегидрокостасын лактон, ЦСР.

scholarly journals Crystal structure of the co-crystalline adduct 1,3,6,8-tetraazatricyclo[4.4.1.13,8]dodecane (TATD)–4-bromophenol (1/2)

2015 ◽  
Vol 71 (5) ◽  
pp. 463-465 ◽  
Author(s):  
Augusto Rivera ◽  
Juan Manuel Uribe ◽  
Jicli José Rojas ◽  
Jaime Ríos-Motta ◽  
Michael Bolte
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Hydrogen Bonds ◽  
Rotation Axis ◽  
The Other ◽  
Two Dimensional ◽  
Asymmetric Unit ◽  
Species Association ◽  
Crystalline Adduct ◽  
Aminal Cage

The structure of the 1:2 co-crystalline adduct C8H16N4·2C6H5BrO, (I), from the solid-state reaction of 1,3,6,8-tetraazatricyclo[4.4.1.13,8]dodecane (TATD) and 4-bromophenol, has been determined. The asymmetric unit of the title co-crystalline adduct comprises a half molecule of aminal cage polyamine plus a 4-bromophenol molecule. A twofold rotation axis generates the other half of the adduct. The primary inter-species association in the title compound is through two intermolecular O—H...N hydrogen bonds. In the crystal, the adducts are linked by weak non-conventional C—H...O and C—H...Br hydrogen bonds, giving a two-dimensional supramolecular structure parallel to thebcplane.

Complexes of N-Aryltriphenylphosphinimines with Mercury(II) Halides

1999 ◽  
Vol 54 (7) ◽  
pp. 858-862 ◽  
Author(s):  
Thomas P. Braun ◽  
Paul A. Gutsch ◽  
Hans Zimmer
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Structure Analysis ◽  
Nmr Spectra ◽  
Crystal Structure Analysis ◽  
Phosphonium Salts ◽  
X Ray

The synthesis, IR and 31P NMR spectra of the complexes of various N-aryltriphenylphosphinimines with some mercury dihalides as well as the corresponding phosphonium salts are reported. It is shown by an X-ray crystal structure analysis of the complex of the unsubstituted phosphinimine with HgCl2 that in the solid state these complexes form dimers via two Hg ∙∙∙ μ2- Cl ∙∙∙ Hg bridges.

Bis(cyclooctatetraenyl)zirconium: x-ray crystal structure and solution and solid-state NMR spectra

1991 ◽  
Vol 10 (7) ◽  
pp. 2419-2424 ◽  
Author(s):  
Deborah M. Rogers ◽  
Scott R. Wilson ◽  
Gregory S. Girolami
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Solid State Nmr ◽  
Nmr Spectra ◽  
X Ray

Total assignment of the 1H and 13C spectra of mikanokryptin and comparison of its solution and solid state conformations

1985 ◽  
Vol 63 (4) ◽  
pp. 849-853 ◽  
Author(s):  
William F. Reynolds ◽  
Raul G. Enríquez ◽  
Marco A. Chavez ◽  
Ana L. Silba ◽  
Miguel A. Martinez
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Pulse Sequences ◽  
Detailed Comparison ◽  
Coupling Constants ◽  
Dihedral Angles ◽  
Two Dimensional ◽  
Spectral Editing ◽  
One Dimensional ◽  
Inversion Recovery Pulse

The 1H and 13C spectra of mikanokryptin are unambiguously assigned using a variety of one-dimensional nmr experiments (selective homonuclear decoupling, use of inversion–recovery pulse sequences to reveal hidden peaks, and DEPT spectral editing) in conjunction with normal and "long range" two-dimensional heteronuclear correlated experiments. Detailed comparison of vicinal, allylic, and homoallylic 1H—1H coupling constants with dihedral angles determined from an earlier crystal structure determination indicates that solution and solid state configurations are similar.

Hantzsch 1,4-dihydropyridine esters and analogs: candidates for generating reproducible one-dimensional packing motifs

2009 ◽  
Vol 65 (3) ◽  
pp. 375-381 ◽  
Author(s):  
R. S. Rathore ◽  
B. Palakshi Reddy ◽  
V. Vijayakumar ◽  
R. Venkat Ragavan ◽  
T. Narasimhamurthy
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Hydrogen Bonds ◽  
Structure Analysis ◽  
Crystal Structure Analysis ◽  
Structural Requirements ◽  
One Dimensional ◽  
High Binding ◽  
Solid State Materials ◽  
Derivatives Of

Examination of the symmetric Hantzsch 1,4-dihydropyridine ester derivatives of the prototypical nifedipine molecule indicates the tendency of this class of molecule to form a common packing motif. Crystal structure analysis of 2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylic diesters and analogs reveals that they form extended chains, characterized as the C(6) packing motif, via intermolecular (amine) N—H...O=C (C3,C5 carbonyl) hydrogen bonds. In addition, all the prepared derivatives also satisfy the basic structural requirements for their high binding efficiency to the receptor. The reproducible C(6) packing motif observed among these compounds has a use in the design of solid-state materials.

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