Enter your Sign-on user name and password.

Forgot password?
  • Follow us on:
Loading video...
Text Comments (22)

1 answer

Last reply by: Professor Starkey
Thu Oct 27, 2011 10:56 AM

Post by Jindou Tian on October 26, 2011

Hi Dr. Starkey, could you explain why CN- and NH3 are weak bases? I thought all strong nu: are basically strong bases.

1 answer

Last reply by: Professor Starkey
Sat Nov 5, 2011 3:14 PM

Post by Jindou Tian on October 27, 2011

Hi Dr. Starkey, thank you for your quick response! Are we able to judge the basicity based on the electronegativity of the compound? Also, could you please tell me what reaction will take place, Sn1 or E1, when CH2=CH-CH2Br reacts with water? I know that since the carbon cation is allylic, there won't be any rearrangement occurs. But what will happen after the LG leaves?

1 answer

Last reply by: Professor Starkey
Fri Jan 27, 2012 11:00 PM

Post by thuy dinh on January 26, 2012

Hi Profosser,
Can you explain why SN1 is the more major product than the E1 in the second example please?

1 answer

Last reply by: Professor Starkey
Fri Feb 3, 2012 11:27 PM

Post by thuy dinh on February 2, 2012

Thanks for answering my question, I just had my first exam this semester for Organic chem. II. My teacher put a reaction with two leaving groups, it was called 2,5 dichloro-2-methylpentane reacting with a stronger nucleophile that wasn't a base. I know that it is a substitution reaction but would it be SN2 or SN1 since one chlorine is on a teritary carbon and the other chloride is a primary?

3 answers

Last reply by: natasha plantak
Sun Dec 16, 2012 11:22 AM

Post by natasha plantak on December 12, 2012

How come the final example, 70:22, can't undergo an E1 Rx?

1 answer

Last reply by: Professor Starkey
Sun Jan 13, 2013 11:55 AM

Post by Aaron Harper on January 11 at 04:27:18 PM

I understand know, why Professor Starkey used H2O as the base, because your solvent is H2O, thus more H2O than Cl-, as in this case and before when I commented some videos back.

Thanks for the education!

1 answer

Last reply by: Professor Starkey
Sun Jan 27, 2013 11:11 PM

Post by kathy jarman on January 27 at 04:44:18 PM

Hi Dr. Starkey, at 52:52 (the E2 reaction), could another minor product be produced since there is another beta hydrogen (from the methyl group)? If so, I will assume it will be very minor since the alkene is not as substituted as the other alkene.

1 answer

Last reply by: Professor Starkey
Wed Feb 13, 2013 10:24 PM

Post by Artum Silnitsky on February 13 at 04:31:37 AM

HI!
at alkene stability the dr. use 2 ex., in the 2nd ex. - why one of the H's from the CH3 is not an option for Elimination?

1 answer

Last reply by: Professor Starkey
Sat Apr 13, 2013 11:49 AM

Post by Ki Hargis on April 9 at 03:01:58 PM

Hello,

What makes an E2 reaction favored over an SN1 reaction, since both reactions favor tertiary carbons attached to the leaving group?

1 answer

Last reply by: Professor Starkey
Wed May 15, 2013 11:30 PM

Post by Some one on May 15 at 12:55:35 AM

Hello Professor, why does the base attack the beta hydrogens instead of the alpha hydrogens?

Elimination Reactions

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

Chemistry: Organic Chemistry