Comments on: Chemical Kinetics

By: Chemical Kinetics: Reaction Rates and Mechanisms

Chemical Kinetics: Reaction Rates and Mechanisms — Wed, 29 May 2024 17:19:43 +0000

[…] https://www.masterorganicchemistry.com/2010/09/08/chemical-kinetics/ […]

By: James Ashenhurst

James Ashenhurst — Tue, 21 Feb 2023 17:39:44 +0000

In reply to John Shanahan. Hi John, thank you. I don't know of any off the top of my head, though from time to time I do get this question!

By: John Shanahan

John Shanahan — Tue, 21 Feb 2023 16:52:45 +0000

This is a fantastic site and a great refresher tool for those of us who haven’t taken organic chemistry in a decade or two. Any recommendations for a comparable resource in physical chemistry?

By: James Ashenhurst

James Ashenhurst — Thu, 12 Jan 2023 22:11:11 +0000

In reply to Riley. Thank you. Fixed

By: Riley

Riley — Mon, 04 Apr 2022 01:20:55 +0000

I think there is a typo ini the Sn2 reaction of section 2. In the carbocation molecule, one of the carbons is listed as CH2, but should be CH3.

By: James Ashenhurst

James Ashenhurst — Mon, 15 Apr 2019 19:16:21 +0000

In reply to Mona. Error on the diagram. Fixed!

By: Mona

Mona — Fri, 07 Aug 2015 18:40:16 +0000

Hello James,
firstly, thank you for all your hard work. It is a great preparation for my upcoming org. chem. class.

In the image for SN1 Reaction C4H9Br -> Br- + C4H8
Where did the one Hydrogen atom go? Is this a mistake?
It would be great if you could clarify this as soon as possible!

By: caters

caters — Sat, 28 Jun 2014 04:24:16 +0000

I am confused about 3rd order and above reactions rarely occuring. In fact I disagree with this. Here is a good example of something that goes on and on and on from 2 of the simplest components, methane and chlorine:

The methane and chlorine are dissolved in each other so there is no solvent vs solute, just 2 reactants. The light comes(just plain sunlight can trigger this) and spontaneously the Cl2 breaks apart.

1) Cl2 + CH4 -> HCl + CH3Cl
2) sub 1) CH3Cl + CL2 -> CH2Cl2 + HCl
sub 2) 2 CH3Cl -> Cl2 + C2H6
3) sub 1) CH2Cl2 + Cl2 -> CHCl3 + HCl
sub 2) C2H6 + Cl2 -> C2H5Cl + HCl
etc.

This is of course free radical chlorination leading to every alkane and chlorocarbon(carbon with chlorine bonded to it) possible which is theoretically ∞.

Another example of this 3rd order and above would be if you took an alkyne, hydrogenated that to an alkene, then hydrogenated that to an alkane, than added a halogen to get an alkyl halide.

By: Isabel

Isabel — Mon, 16 Dec 2013 19:49:10 +0000

I love this tutorial,I like math, and I was very good at Chemical Reactores, but I never quite correlated the subject to practical examples. Thanks for doing so…

By: Meredith

Meredith — Mon, 26 Aug 2013 00:40:14 +0000

Thank you for this very useful website. I have stumbled onto it in preparation for my Org. Chem course that starts in a couple of weeks. This has been a really good review.

Question: I just want to clarify your final note… are you talking about the rate constant, or the rate itself?

Thanks.