(CH3)3CCH2Cl , 1'RCL , doesn't participate in typical SN

(CH3)3CCH2Cl , steric effect is a factor, another reason is that the CH3 group is a electron donating group, 3 CH3 groups will push the electron of C-CH2Cl bond closer to the C of CH2Cl, then Cl is easily form Cl- since the electronegativity of Cl is higher than C. Then a Carbonium ion (CH3)3CCH2 is form.


why does CH3CH=CHCl react with AgNO3 more strongly than CH2=CHCH2Cl ????

Ans: Similary , you try to solve it.

Are you sure CH3CH=CHCl reacts with AgNO3 stronger than CH2=CHCH2Cl ?

The fact should be that CH2=CHCH2Cl reacts with AgNO3 stronger than CH3CH=CHCl,
so I propose you should check your book.