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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.(5 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).(2 votes)
- Is there anywhere I can find out what absorption lines correspond to what elements? Thanks(3 votes)
- what is the color of nitrogen gas when electrically charged in a neon tube?(2 votes)
- What does spectroscopy means?
And where does it come from?(2 votes)
- From the latin Spectre or ghost and from the greek scope or watcher. Some people thought they looked like ghosts.(0 votes)
- 3:22what is a spectrograph please explain more clearly(1 vote)
- 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.(1 vote)
- What about the double visible spectrum that appears at2:48?? I believe it´s not right!(1 vote)
- What is atomic emission and absorption in relation to spectroscopy?(1 vote)
- How do they get those elements into the tubes?(1 vote)
- is there a gas, when electrically charged which creates a black color?(1 vote)
- Nothing can emit a "black light" since black is considered the absence of light.(1 vote)
- Why does neon light up when a current passes through it? Is it because of a reaction?(0 votes)
- yes, it is a reaction. the neon gas absorbs the electric current passing through it, therefore emitting light photons(1 vote)