How to think through and decide SN1 vs SN2 vs E1 vs E2 with many examples and mechanisms

[shim]

At 23:05, ring contraction should occur.
A major product is not a six membered ring but a five membered ring.

[ssbeastamv]

also at 26:00 why wouldn't you do E1 instead since the Beta carbon is more substituted. I was told that if you're picking between sn1 and E1, if a beta carbon is substituted you should side with E1.

[mitchelleguerrero]

In problem 14:24, let's say that the CH3 was on a solid wedge, would Zaitsev's rule then apply and the double bond would attach to the CH3? (Since the hydrogen would now be behind and anti-periplanar to the Br)

[NamesIWantAreInvalid]

At 25:00 I dont understand what you said about chiral centres. Can you please explain?

[dijunwang]

Hello sir. Thank you for the perfect explanation for every reaction. At 12:40, after you placed both chlorine and hydrogen in "anti" positions on the plane, should we consider the factor of "carboncation rearrangement"

[ssbeastamv]

Can you please explain why in the first problem with E2 the double bond wasn't formed between the more substituted carbon? I wasn't told by my professor when you do the hoffman product

[christianborja]

On the very first one, why would you not hydride shift from the carbon on the left since it would form a more stable product ?

[ThrottleChemistry]

Why didn't you just rotate your methyls (the one on the plane, second on the dash) counter-clockwise. You'd end up with H on the dash, methyl on wedge and the other methyl on plane?

[TheodorerooseveltTheFourTH]

OH- and OR- , acts as Nu for 1* and acts as base for 2* ?

[maxeey]

Halide anions are unlikely to deprotonate due to their negative disassociation constants.

[ammar-cu]

what software do you use bro to make such videos?