Topic: Chemical Shift
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What Is Chemical Shift?
Nuclear magnetic resonance (NMR) is one of the most powerful tools available to modern organic chemists. With NMR data, determining the structure of small molecules becomes a relatively quick (if not entirely painless) process. One of the c... Read More »
Source: http://www.ehow.com/info_8744493_chemical-shift.html
How to Predict Proton Chemical Shifts
Nuclear Magnetic Resonance Spectroscopy is useful in obtaining data on unknown organic compounds. A sample is placed in a powerful magnetic field, which aligns hydrogen nuclei (protons) along an energetically favorable axis. The protons are... Read More »
Source: http://www.ehow.com/how_5692347_predict-proton-chemical-shifts.ht...
Why downfield proton chemical shifts are not reliable aromaticity...
Traces of magnetizability, traces of magnetic shielding at the hydrogen nuclei, and nucleus-independent chemical shift are not reliable aromaticity quantifiers for planar conjugated hydrocarbons. A measure of aromaticity is provided by the ... Read More »
Source: http://www.ncbi.nlm.nih.gov/pubmed/16048316
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Chemical Shift
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The NCBI web site requires JavaScript to function. more...
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Source: http://www.ncbi.nlm.nih.gov/pubmed/16048316
So if something is reacting faster/slower, it means that there is either a change in the amount of reactant, or a catalyst has been introduced (or the amount of catalyst has changed). A catalyst is just a fancy word for something that speed...
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Source: http://answers.yahoo.com/question/index?qid=20120401215650AAZQQ9K
I'd say there are three approaches: 1. you may know from previously published spectra what is the chemical shift, approximately, for each common component of most organic molecules. I don't have to calculate anything to tell that your CH3 w...
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Source: http://answers.yahoo.com/question/index?qid=20100210111636AAZluLM
I always thought dogs laid eggs! - mmm, I've learnt something today
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Source: http://uk.answers.yahoo.com/question/index?qid=20071013082902AARA...
CHCl3 in CDCl3 has a singlet at 7.257 ppm. As for any potential impurity peak, integrate it and compare the integral to peaks that belong to your compound for sure. Is there a simple ratio? Source(s): first google hit for "chloroform chemic...
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Source: http://answers.yahoo.com/question/index?qid=20100308171030AAApMp6
