Chemistry Optional Notes On – McLafferty Rearrangement – For W.B.C.S. Examination.

ঐচ্ছিক রসায়ন  নোট – ম্যাকল্যাফের্টি পুনর্বিন্যাস – WBCS পরীক্ষা।

Chemistry is one such optional offered in the W.B.C.S. Examination. It is one of the optional subjects that is preferred by the aspirants graduated with the subject. Chemistry optional is a scoring subject if aspirants have sound knowledge in it. Similar to other optional papers, chemistry also has two papers. The paper I of chemistry optional deals with Inorganic Chemistry and Physical Chemistry. Paper-II completely deals with Organic Chemistry.Following previous years question papers are a must when it comes to optional subjects.The McLafferty rearrangement is a reaction observed in mass spectrometry during the fragmentation or dissociation of organic molecules. It is sometimes found that a molecule containing a keto-group undergoes β-cleavage, with the gain of the γ-hydrogen atom, as first reported by Nicholson working in the Division of Chemical Physics at the CSIRO in Australia.This rearrangement may take place by a radical or ionic mechanism.Continue Reading Chemistry Optional Notes On – McLafferty Rearrangement – For W.B.C.S. Examination.

A description of the reaction was later published by the American chemist Fred McLafferty in 1959 leading to his name being associated with the process.

The McLafferty rearrangement is an organic reaction seen in mass
 
spectrometry. A mass spectrometer breaks apart the molecule being
 
studied. The molecule breaks apart in consistent ways that chemists can
 
predict. Most times, a carbon-carbon bond breaks and the atoms do not
 
jump across the break between the fragments. The McLafferty
 
rearrangement is an example of a hydrogen atom jumping to the other
 
fragment as a part of the process of the bond breaking. It happens in an
 
organic molecule containing a keto-group.Also Read, Sociology Notes On – Economic Determinism – For W.B.C.S. Examination.
 
 
The McLafferty rearrangement is an organic reaction seen in mass
 
spectrometry. A mass spectrometer breaks apart the molecule being
 
studied. The molecule breaks apart in consistent ways that chemists can
 
predict. Most times, a carbon-carbon bond breaks and the atoms do not
 
jump across the break between the fragments.
 
After molecules are ionized in a mass spectrometer, they become
 
radical cations that can then be sorted and weighed. Some of these radical
 
cations can also rearrange after being ionized. The most famous
 
rearrangement is called the McLafferty rearrangement.
 

 

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