Question

what mechanism of SN1 and SN2? please answer me in detail

Answer 1

please refer ncert textbook chemistry dear

Answer 2

An SN1 reaction is an unimolecular substitution reaction (hence the name SN1). This means it's a substitution reaction in which the rate of the reaction is only dependent on the concentration of the substrate, as opposed to SN2. In an SN1 reaction, the leaving group of the substrate departs first, leaving a carbocation on the substrate. Then, the nucleophile donates an electron pair to the carbocation and forms a bond. In an SN1 reaction, the carbon molecule bonded to the leaving group must therefore be a tertiary substituted carbon. This is because when the leaving group departs from the molecule, only a tertiary substituted carbon is stable enough as a cation. 
Keep in mind that an SN1 reaction leads to two isomer products. If the tertiary carbon is a chiral senter, the two products of the SN1 reaction have an R and S configuration, respectively. The mixture of these isomers is racemic, and the isomers have identical physical properties.Spare No 1
raction


SN2


1.in sn2 reaction the departing and attacking proccess occurs at the same time.


2.these is pule rampai from the university of johannesburg
3.The substrate is with a relatively unhindered leaving group (typically from a methyl, primary, or secondary alkyl halide)
4.The nucleophile is strong (usually negatively charged) and is of high concentration 
5.The solvent used is polar and aprotic.