Stereoisomerism in pentaerythritol-bridged cyclotriphosphazene tri-spiranes: spiro and ansa 1,3-propanediyldioxy disubstituted derivatives [PDF]
, 2005 Four isomeric products were isolated and purified from the reaction of 1,3-propanediol with the tetra-spirane cyclophosphazene-organophosphate compound (1): viz. the di-monospiro (2a), di-monoansa (2b) and two monospiro-monoansa derivatives (2c) and (2d).
Aylin, U. +6 more
core +1 more source
Metabolites, 2019 Nuclear magnetic resonance (NMR) spectroscopy is a powerful tool for the non-targeted metabolomics of intact biofluids and even living organisms. However, spectral overlap can limit the information that can be obtained from 1D 1H NMR.
Maryam Tabatabaei Anaraki +6 more
doaj +1 more source
Chinese Journal of Magnetic Resonance, 2020 The dolomite reservoirs in the fourth member of Leikoupo formation of the western Sichuan gas field have good prospects for natural gas exploration and development. However, the conventional and one-dimensional nuclear magnetic resonance (1D NMR) logging
ZHANG Shi-mao +3 more
doaj +1 more source
Ruthenium Olefin Metathesis Catalysts Bearing Carbohydrate-Based N-Heterocyclic Carbenes [PDF]
, 2010 Ru-based olefin metathesis catalysts containing carbohydrate-derived NHCs from glucose and galactose were synthesized and characterized by NMR spectroscopy. 2D-NMR spectroscopy revealed the presence of Ru−C (benzylidene) rotamers at room temperature, and
Grubbs, Robert H., Keitz, Benjamin K.
core +2 more sources
A solution NMR approach to determine the chemical structures of carbohydrates using the hydroxyl groups as starting points [PDF]
, 2018 An efficient NMR approach is described for determining the chemical structures of the monosaccharide glucose and four disaccharides, namely, nigerose, gentiobiose, leucrose and isomaltulose.
Bauer, Julia +3 more
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1D AND 2D NMR STUDIES OF 2–(2–(BENZYLOXY)–3–METHOXYPHENYL)–1H–BENZIMIDAZOLE
Indonesian Journal of Chemistry, 2010 The reaction of Benzyl o-vanillin 1 and o-phenylene diamine 2 in dichloromethane produced new benzimidazole, 3. The complete assignments of 3 were made using 1D and 2D NMR including COSY, HMQC and HMBC NMR in CDCl3 and acetone-d6.
Mohammed Hadi Al–Douh +2 more
doaj +1 more source
MetaboMiner – semi-automated identification of metabolites from 2D NMR spectra of complex biofluids
BMC Bioinformatics, 2008 Background One-dimensional (1D) 1H nuclear magnetic resonance (NMR) spectroscopy is widely used in metabolomic studies involving biofluids and tissue extracts.
Tang Peter +3 more
doaj +1 more source
A C# Language-Based Software for Designing Two-Dimensional NMR Logging Activation Sets
Chinese Journal of Magnetic Resonance, 2019 Two-dimensional (2D) NMR logging activation sets are acquisition means aiming at obtaining specific formation information, affecting the adaptability of NMR instruments to different types of reservoirs and the reliability of the original data.
CUI Shuai-shuai +5 more
doaj +1 more source
Isolation of lupeol from the stem bark of Leptadenia hastata (Pers.) Decne
Journal of Applied Sciences and Environmental Management, 2020 Dried stem bark powder of Leptadania hastata was subjected to maceration with methanol to afford crude methanol extract, which was partitioned with n-hexane, ethylacetate, chloroform and n- butanol to afford different their respective fractions ...
M.M. Mailafiya +7 more
doaj +1 more source
Theoretical studies of 31P NMR spectral properties of phosphanes and related compounds in solution [PDF]
, 2010 Selected theoretical methods, basis sets and solvation models have been tested in their ability to predict 31P NMR chemical shifts of large phosphorous-containing molecular systems in solution.
Al-Farhan +91 more
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