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Proton nuclear magnetic resonance (proton NMR, hydrogen-1 NMR, or 1 H NMR) is the application of nuclear magnetic resonance in NMR spectroscopy with respect to hydrogen-1 nuclei within the molecules of a substance, in order to determine the structure of its molecules. [1]
Hexamethylbenzene, also known as mellitene, is a hydrocarbon with the molecular formula C 12 H 18 and the condensed structural formula C 6 (CH 3) 6.It is an aromatic compound and a derivative of benzene, where benzene's six hydrogen atoms have each been replaced by a methyl group.
As for the wine or the fruit, the interpretation of results in terms of origin is done by comparison of the isotopic parameters of the sample analyzed with those from a group of referenced molecules of known origin. It appears that all the origins of vanillin are well discriminated using 2 H-NMR data. Particularly, vanillin ex-bean can well be ...
SDBS includes 14700 1 H NMR spectra and 13000 13 C NMR spectra as well as FT-IR, Raman, ESR, and MS data. The data are stored and displayed as an image of the processed data. Annotation is achieved by a list of the chemical shifts correlated to letters which are also used to label a molecular line drawing.
It is produced by methylation of other methylated benzene compounds such as p-xylene and pseudocumene. [2] C 6 H 4 (CH 3) 2 + 2 CH 3 Cl → C 6 H 2 (CH 3) 4 + 2 HCl. In industry, a mixture of xylenes and trimethylbenzenes is alkylated with methanol. Durene can be separated from its isomers by selective crystallization, exploiting its high ...
m-Xylene (meta-xylene) is an aromatic hydrocarbon.It is one of the three isomers of dimethylbenzene known collectively as xylenes.The m-stands for meta-, indicating that the two methyl groups in m-xylene occupy positions 1 and 3 on a benzene ring.
Benzene is a known cancer-causing chemical that is widely used across the U.S. to make things like plastic, resin and synthetic fibers, according to the Centers for Disease Control and Prevention.
Its structure consists of a benzene ring substituted with a tert-butyl group. It is a flammable colorless liquid which is nearly insoluble in water but miscible with organic solvents. It is a flammable colorless liquid which is nearly insoluble in water but miscible with organic solvents.