Part 6:Alkenes' Mass Spectrum(Fragmentation Pattern) for CSIR NET/GATE 

Thank you very much, God bless you, it's all your effort credit always goes to the students.

Sai Teja pls tell me in short which subject u studied from tetrahedron chemistry means except your pharmacology .phseutic and medicinal

@@pritysinha8224 instrumental analysis

@@saiteja6742 tqqq teja ji as my sis Rashmi sinha is also preparing for gpat so I always discusss some topic with her as I am doing my msc chemistry and this spectroscopy matches in both of our syllabus

1. MCLAFFERTY rearrangement is the transfer of gama H to the terminal atom of unsaturated system and it would be a transfer of radical hydrogen, so radical must be on primary carbon (you may also try to put + on primary carbon but be careful mechanism would ionic to move electrons) however what I have written is also fine, one may write in any form. 2. To understand McLafferty rearrangement in detail, see fragmentation of carbonyl compounds in the same playlist.

@@TETRAHEDRONCHEMISTRYCLASSES sir, in pent 2 ene could u plz tell us how ethene molecule is removed ?

M-15 is formed by the loss of methyl radical forms allylic cation which is even more stable than allylic carbocation which is formed by M-29, you can do fragmentation and compare the stability of two allylic carbocation in the light of GOC (General Organic Chemistry).

Right

It's a simple mass spectrum, plz go through the link and apply concepts which I have explained in my video of mass spectrum of Alkane. chem.libretexts.org/Bookshelves/Organic_Chemistry/Supplemental_Modules_(Organic_Chemistry)/Spectroscopy/Mass_spectrometry_1#:~:text=The%20mass%20spectrum%20of%20dodecane,over%20all%20the%20covalent%20bonds.

Will try

Yes it is m/z 95 and the same ion may rearrange to give C7H9+ (toluenium ion) m/z 93...

Will try

@@TETRAHEDRONCHEMISTRYCLASSES please try as soon as possible bcz it's my assignment topic

Plz analyse your spectrum and use same methods for indexable as I have explained for straight chain alkanes.