Thursday, 4 January 2018

INTERCONVERSIONS OF PROJECTION FORMULA

It is important to have a clear idea of the inter-relationship between various projections of a given organic molecule to understand the stereochemical implications of the reactions. For this, we should be well conversant with the methods of translating one projection into another. The methods used...

Hybridization

Hybridization may be defined as the mixing of two or more than two atomic orbitals of an atom, having comparable energy, to give an equal number of identical orbitals hπaving same energy and shape. All hybrid orbitals are oriented symmetrically to have a maximum distance from each other. Thus, the...

Sunday, 31 December 2017

ELIMINATION REACTION - E2- ELIMINATION REACTION - REACTION MECHANISM (ORGANIC CHEMISTRY)

Elimination reaction involves the loss of two groups are atoms from a Molecule. The reactions are classified under 2 general headings β- elimination  (1, 2 elimination),  the most common elimination reaction,  in which groups on adjacent atoms are eliminated with the formation of an...

ELIMINATION REACTION- E1 MECHANISM; E1cB MECHANISM (ORGANIC CHEMISTRY)

E1- Mechanism: This elimination takes place (without the participation of a base) in 2 steps,  unimolecular ionization,  being rate-determining step.  The main feature of this mechanism is that under the influence of solvation forces the electron attracting group (leaving...

PYROLYTIC SYN OR THERMAL ELIMINATION; REGIOSELECTIVITY OF E1 & E2 REACTION (ORGANIC CHEMISTRY)

Pyrolytic syn elimination reaction (Ei - elimination internal): This thermal elimination occurs in a family of a compound like an acetate Esters, methyl xanthate ester, tertiary amine oxide, sulphoxides and selenoxides which contain at least one β hydrogen atom with the formation of olefins. ...
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