Comments on: Thermodynamic and Kinetic Products

By: James Ashenhurst

James Ashenhurst — Mon, 29 Jan 2024 17:36:23 +0000

In reply to Jenni. I am so happy to hear that. Thanks for stopping by and letting me know! - James

By: Jenni

Jenni — Sat, 27 Jan 2024 20:21:24 +0000

IDK if you check these but MOC carried me through Orgo

By: James Ashenhurst

James Ashenhurst — Thu, 31 Oct 2019 20:56:05 +0000

In reply to King. It depends on the reaction. If you're talking about addition of HBr to dienes, which is normally the case for these kinds of discussion, then 40 degrees celsius is on the high side.

By: King

King — Thu, 31 Oct 2019 17:51:57 +0000

What to do with the temperature? I mean what range of temperature should be considered high and what as low.
Just asking coz 40℃ sounds as low temperature but it is going with thermodynamically controlled conditions

By: James Ashenhurst

James Ashenhurst — Wed, 23 Oct 2019 17:58:20 +0000

In reply to Kelan Bomar.

How to know if a reaction will be under kinetic or thermodynamic control? As you alluded to, reversibility is the key criterion.
Without reversibility, there is no thermodynamic control.

There’s no hard-and-fast temperature I can cite to you, but if you see “reflux”, “heat”, or the “delta” symbol, that’s a clue that it’s probably be under thermodynamic control.

By: Pulkit

Pulkit — Wed, 16 May 2018 10:16:58 +0000

Please tell me where are the answers to the three questions in the post on reactions of dienes:1,2 and 1,4 addition?

By: Chris G.

Chris G. — Thu, 22 Feb 2018 05:02:00 +0000

Dear James,

Is the activation energy during the formation of a thermodynamic product always greater than that of a kinetic product, and is a thermodynamic product always more stable than the kinetic product?

Basically, can I ever find such a thing as a cheap can opener that’ll last?

By: Kelan Bomar

Kelan Bomar — Fri, 11 Aug 2017 20:10:37 +0000

Hi, James
Thanks for the awesome analogy to your can opener incident I now understand the difference between kinetic and thermodynamic control. My next question is; besides for reaction reversability, is there a way to predict whether a specific reaction will be under thermodynamic or kinetic control? Or is reversibility the main determinant?
My question arises because on introduction of the diene reactions in class some people knew immediately whether the reaction was underthermodynamic vs kinetic control without information of the major product and so I want to know how they did it so i can too.

By: James

James — Tue, 15 Apr 2014 14:48:36 +0000

In reply to Pete. Fixed to reflect this. Thanks for the correction Pete.

By: James

James — Mon, 31 Mar 2014 01:09:50 +0000

In reply to dave. Thanks for the extra push, I do need to correct this.