31P NMR Chemical Shifts of Solvents and Products Impurities in Biomass Pretreatments
نویسندگان
چکیده
منابع مشابه
NMR Chemical Shifts of Common Laboratory Solvents as Trace Impurities.
In the course of the routine use of NMR as an aid for organic chemistry, a day-to-day problem is the identification of signals deriving from common contaminants (water, solvents, stabilizers, oils) in less-than-analytically-pure samples. This data may be available in the literature, but the time involved in searching for it may be considerable. Another issue is the concentration dependence of c...
متن کاملNMR Chemical Shifts of Trace Impurities: Common Laboratory Solvents, Organics, and Gases in Deuterated Solvents Relevant to the Organometallic Chemist
Gregory R. Fulmer,* Alexander J. M. Miller, Nathaniel H. Sherden, Hugo E. Gottlieb, Abraham Nudelman, Brian M. Stoltz, John E. Bercaw, and Karen I. Goldberg Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, Arnold and Mabel Beckman Laboratories of Chemical Synthesis and Caltech Center for Catalysis and Chemical Synthesis, Division of Chemistry and Ch...
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We have measured and quantum chemically computed NMR chemical shifts for three monoterpene diastereomers produced by the walkingstick, Anisomorpha buprestoides. By taking into account the Boltzmann distribution of conformers, the combined RMSDs between experimental and calculated (1)H and (13)C NMR shifts were able to determine the correct isomer, especially when only aliphatic nuclei were used...
متن کاملStandardization of chemical shifts of TMS and solvent signals in NMR solvents.
The standard for chemical shift is dilute tetramethylsilane (TMS) in CDCl3, but many measurements are made relative to TMS in other solvents, the proton resonance of the solvent peak or relative to the lock frequency. Here, the chemical shifts of TMS and the proton and deuterium chemical shifts of the solvent signals of several solvents are measured over a wide temperature range. This allows fo...
متن کاملXenon NMR: chemical shifts of a general anesthetic in common solvents, proteins, and membranes.
The rare gas xenon contains two NMR-sensitive isotopes in high natural abundance. The nuclide 129Xe has a spin of 1/2: 131Xe is quadrupolar with a spin of 3/2. The complementary NMR characteristics of these nuclei provide a unique opportunity for probing their environment. The method is widely applicable because xenon interacts with a useful range of condensed phases including pure liquids, pro...
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ژورنال
عنوان ژورنال: ACS Sustainable Chemistry & Engineering
سال: 2017
ISSN: 2168-0485,2168-0485
DOI: 10.1021/acssuschemeng.7b03602