Distribution of aliphatic and aromatic carbons in H-Coal liquids by quantitative 13C FT-n.m.r. spectroscopy

Joseph, Joseph T.; Wong, John L.

doi:10.1016/0016-2361(80)90254-9

Fuel

1980

DOI: 10.1016/0016-2361(80)90254-9

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Distribution of aliphatic and aromatic carbons in H-Coal liquids by quantitative 13C FT-n.m.r. spectroscopy

Joseph T. Joseph

John L. Wong

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1981

1986

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Cited by 17 publications

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“…Other techniques used include quantitative Fourier transform/NMR spectroscopy (40), fluorescence line narrowing spectrometry (10), and the application of the method of rank annihilation to fluorescent multicomponent mixtures (37).…”

mentioning

confidence: 99%

Functional group analysis

Smith¹,

Patterson²

1982

Anal. Chem.

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The analytical methods discussed in this review have been selected from the literature which has become available to the reviewers from Dec 1979 through Nov 1981.Several topics are not listed under the classifications which follow but are of general interest. A new book on the determination of elements and groups has been published (7). Absorption spectroelectrochemistry may be useful for analytical procedures involving oxidation-reduction systems.Compounds which have been studied include 4-amino-4'methoxydiphenylamine, tris(5-nitro-l,10-phenanthroline)iron(II) perchlorate, and 4,4'-diamino-3,3,-dimethylbiphenyl (102). Room-temperature phosphorescence gives promise as a new analytical technique (72). Multiplex gas chromatography (74) and functional group analysis of interferometric data from gas chromatography/Fourier transform infrared spectroscopy ( 108) are also topics of current interest.Several pentafluorophenyldialkylchlorosilanes are described as versatile derivatizing agents for use in gas chromatography with electron-capture detectors (76). The use of ion-selective electrodes and sodium tetraphenylborate as titrant permits potentiometric precipitation titrations of a variety of water-soluble cations such as quaternary ammonium salts, alkaloids, dyes, and other organic bases (88).

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mentioning

confidence: 99%

Functional group analysis

Smith¹,

Patterson²

1982

Anal. Chem.

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The use of high‐field carbon‐13 NMR spectroscopy to characterize chiral centers in isopranes

Dalling

Pugmire

Grant

et al. 1986

Magnetic Reson in Chemistry

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The 13C nuclear magnetic resonance spectra of four diastereomeric, acyclic isoprenoids [farnesane (C15), pristane (C19), phytane (C20), and squalane (C30)] have been obtained as a means for interpreting hydrocarbon mixtures common in some fossil fuels and biosynthesized organic compounds. Multiple resonance environments were detected for carbons influenced by two or three chiral centers. Samples of farnesane and squalane were found to exhibit random stereochemistry, whereas the phytane sample was demonstrated to be a mixture of two isomers, probably the 6(R), 10(S), 14(R,S) compound. The sample of pristane consisted of a single diastereomer and was probably obtained from a natural product. It is shown that general chemical shift assignments can be made in this class of molecules by considering the number of carbons located at positions one, two and three bonds distant, while assignment of closely spaced lines may be made on the basis of diastereomerically induced chemical shifts. Using these principles, the structural features of two fossil fuels were analysed.

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The electrochemistry of coal and coal liquids. II. Cyclic voltammetry of H-coal liquids

Santos

Baldwin

1986

J Appl Electrochem

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Distribution of aliphatic and aromatic carbons in H-Coal liquids by quantitative 13C FT-n.m.r. spectroscopy

Cited by 17 publications

References 17 publications

Functional group analysis

Functional group analysis

The use of high‐field carbon‐13 NMR spectroscopy to characterize chiral centers in isopranes

The electrochemistry of coal and coal liquids. II. Cyclic voltammetry of H-coal liquids

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