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Advanced Organic Chemistry: Mass spectrum of butane
Interpreting the mass spectrum of butane Doc Brown's Chemistry Advanced Level Pre-University Chemistry Revision Study Notes for UK IB KS5 A/AS GCE advanced A level organic chemistry students US K12 grade 11 grade 12 organic chemistry courses involving molecular spectroscopy analysing mass spectra of butane See also comparing the IR, mass, 1H NMR and 13C NMR spectra of 2-methylpropane and butane
Butane C4H10
For more see The molecular structure, classification and naming of alkanes Interpreting the fragmentation pattern of the mass spectrum of butane [M]+ is the molecular ion peak (M) with an m/z of 58 corresponding to [C4H10]+, the original butane molecule minus an electron, [CH3CH2CH2CH3]+. You might see a tiny M+1 peak at m/z 59, corresponds to an ionised butane molecule with one 13C atom in it i.e. an ionised butane molecule of formula [13C12C3H10]+
The most abundant ion of the molecule under mass spectrometry investigation (butane) is usually given an arbitrary abundance value of 100, called the base ion peak, and all other abundances ('intensities') are measured against it. Identifying the species giving the most prominent peaks (apart from M) in the fragmentation pattern of butane. Unless otherwise indicated, assume the carbon atoms in butane are the 12C isotope. Some of the possible positive ions, [molecular fragment]+, formed in the mass spectrometry of butane.
See also comparing the IR, mass, 1H NMR and 13C NMR spectra of 2-methylpropane and butane
Key words & phrases: C4H10 CH3CH2CH2CH3 image diagram on how to interpret and explain the mass spectrum of butane m/z m/e base peaks, image and diagram of the mass spectrum of butane, details of the mass spectroscopy of butane, low and high resolution mass spectrum of butane, prominent m/z peaks in the mass spectrum of butane, comparative mass spectra of butane, the molecular ion peak in the mass spectrum of butane, analysing and understanding the fragmentation pattern of the mass spectrum of butane, characteristic pattern of peaks in the mass spectrum of butane, relative abundance of mass ion peaks in the mass spectrum of butane, revising the mass spectrum of butane, revision of mass spectroscopy of butane, most abundant ions in the mass spectrum of butane, how to construct the mass spectrum diagram for abundance of fragmentation ions in the mass spectrum of butane, how to analyse the mass spectrum of butane, how to describe explain the formation of fragmented ions in the mass spectra of butane equations for explaining the formation of the positive ions in the fragmentation of the ionised molecule of butane recognising the base ion peak of butane interpreting interpretation the mass spectrum of butane n-butane Stick diagram of the relative abundance of ionised fragments in the fingerprint pattern of the mass spectrum of butane. Table of the m/e m/z values and formula of the ionised fragments in the mass spectrum of butane. The m/e m/z value of the molecular ion peak in the mass spectrum of butane. The m/e m/z value of the base ion peak in the mass spectrum of butane. Possible examples of equations showing the formation of the ionised fragments in butane. Revision notes on the mass spectrum of butane. Matching and deducing the structure of the butane molecule from its mass spectrum. Links associated with butane
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