The chemical shifts of methylene carbons in phenol novolac resins by carbon-13 nuclear magnetic resonance
نویسندگان
چکیده
منابع مشابه
Nuclear magnetic resonance spectroscopy. Ring-current effects on carbon-13 chemical shifts.
A comparison of the (13)C nuclear magnetic resonance chemical shifts of some 15,16-dialkyl-15,16-dihydropyrenes with the corresponding 15,16-dialkyl-2,7,15,16-tetrahydropyrenes provides a measure of the effect of ring current on carbon-13 chemical shifts in which other effects may be expected to be negligibly small. The general conclusion is that the absolute magnitude of the ring-current effec...
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13CO NMR chemical shifts and 12CO infrared stretching frequencies have been measured for cytochrome P-450cam-CO in the presence of D-camphor and of various camphor analogues. A linear correlation between both parameters delta (13C) and v(CO) was found indicating that the steric and electrostatic interactions acting on the CO ligand are influenced by the substrate. It has been proved that P-450 ...
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The 13C n.m.r. spectrum of Forssman hapten was obtained at 25.16 MHz in [3H] chloroform/[2H] methanol (1:1, v/v), using purified glycosphinogolipid from canine intestinal mucosa (glycolipid I). All amide, olefin, anomeric, intersaccharide glycosidic ether, amide linkage, methyl and many methylene resonances were resolved and assigned. Analysis of the anomeric region reveals the following pentag...
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ژورنال
عنوان ژورنال: BUNSEKI KAGAKU
سال: 1974
ISSN: 0525-1931
DOI: 10.2116/bunsekikagaku.23.520