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- In the proton NMR of 2-methyl-2- butanol http://sdbs.db.aist.go.jp/sdbs/cgi-bin/direct_frame_top.cgi why don't the hydrogens labeled 'C' receive separate splitting patterns if they are located on separate carbons.(6 votes)
- The two 'C' methyl groups are in identical environments. They experience the same degree of shielding on average (it varies a bit as the single bonds rotate and the molecule samples conformational space, but these average out in the NMR pulse timeframe). They are also equivalent in their covalent bonds (they are both bound to the same carbon). Hence, all six hydrogens have identical chemical shifts and identical coupling (splitting pattern).(3 votes)
- Is there anywhere I can find out what absorption lines correspond to what elements? Thanks(4 votes)
- What does spectroscopy means?
And where does it come from?(3 votes)
- From the latin Spectre or ghost and from the greek scope or watcher. Some people thought they looked like ghosts.(1 vote)
- 3:22what is a spectrograph please explain more clearly(2 votes)
- A spectrograph displays more clearly the wavelengths of the visible spectrum. For example, it will show that red will have a longer wavelength but a shorter frequency than that of violet.(2 votes)
- is there a gas, when electrically charged which creates a black color?(2 votes)
- Why does neon light up when a current passes through it? Is it because of a reaction?(1 vote)
- yes, it is a reaction. the neon gas absorbs the electric current passing through it, therefore emitting light photons(2 votes)