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 In SN2 reaction, inversion of configuration takes place,while in SN1 reaction, racemization takes place.

 Enantiomers differ with respect to the rotation of plane

polarized light and are thus classified as- dextrorotatoryand laevorotatory.

 Chemical name of DDT is -p,p’- dichlorodiphenyltrichloroethane (p stands for para)

 Most of the world’s production of phenol takes place bycumene, C6H5CH (CH3)3.

 Oxidation of phenol with chromic acid (Na2Cr2O7) gives

benzoquinone. Williamson synthesis is the lab method to prepare

symmetrical and unsymmetrical ethers. It follows SN2mechanism.

 DIBAL-H (diisobutylaluminium hydride) is a reducingagent used to reduce nitriles into aldehydes.

 Fehling’s test is used to distinguish between aliphatic

and aromatic aldehydes, because aromatic aldehydes donot respond to this test.

 Fehling solution A is aqueous CuSO4, while Fehlingsolution B is sodium potassium tartrate (Rochelle salt).

 Aldol condensation reaction is shown by thosealdehydes and ketones which have at least one- hydrogen atom.

 Carboxylic acids undergo heating with mineral acids like

H2SO4 or P2O5 to give corresponding anhydrides. Order of reactivity of alcohols with a given halogen acid

(HX) is, 3 alcohol > 2 alcohol > 1 alcohol.

Dr. P. N. PATHAKSASARAM, BIHAR MOB- 9097019270

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