SN1 Substitution Reaction Mechanism Models

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Use this molecular model set to study the SN1 reaction mechanism that has a unimolecular rate-determining step. The importance of sterics and cation stability in organic chemistry can be observed using these models.

The starting molecule shown to the left in the image is Tert-Butyl Alcohol & the product of the reaction is Tert-Butyl Chloride, shown to the right. Not shown, is HCl. See below for instructions on how to choose the parts needed to transform the starting molecule into the product.

Details

In our video we show the conversion of an alcohol to an alkyl halide. This includes formation of a tertiary carbocation and a nucleophilic attack leading to halogenation of the tertiary center.

  1. Open our 3D Model Builder & choose style: Molymod Hybrid Dome
  2. Enter Compound: Tert-Butyl Alcohol & then Press "Build & Show Purchase Options"
  3. Select the atoms & bonds from your model set as listed under Purchase Option 1 & build the molecule shown above.
  4. Now enter "HCl", select the parts from your model set as listed & build the molecule shown.
  5. Select a 4 hole red atom (oxygen) & a short 2mm bond from your set.
You now need to make a slight change to the model of Tert-Butyl Alcohol to make it reaction ready.
  1. Remove the 2 hole red oxygen atom.
  2. Replace it with the 4 hole red oxygen atom.
  3. Move the hydrogen atom from the 2 hole red atom to the 4 hole red atom.
  4. There will be 2 empty holes on the 4 hole red atom. Fill one with a short 2 mm bond.
The structure you see is now ready to react with the HCl molecule.
  1. Remove the 4 hole oxygen atom & replace it with the green atom from the HCl.
  2. Take the loose hydrogen atom & attach it to the 4 hole oxygen atom.
You should now have tert-butyl chloride molecule & a water molecule as the reaction products.

 

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Reviews (9)
2020-10-11

Exactly what I was expecting. I appreciate that it also comes with a piece that helps you remove the connector pieces so it is easy to use. They kept me informed without sending too many emails. Shipping was faster than expected too.

— Carol
2020-10-02

It was good for the first 3 chapters of orgo. I made functional groups and was able to visualize them better thanks to this kit. However once you get into chair and boat conformations, they were much too jangly and plyable to be practical. None of the bonds provided are stiff enough to help with stereochemistry. They are well made as they are. I just did not find them useful for stereochemistry. I'll probably keep them in functional groups for recognition and testing.

— Mike
— Indigo:

Thanks for the feedback. Chair boat can be tricky. If you position your fingers the same way we show with the magnetic version, it will work better. See the video for "cyclohexane". You can actually feel the difference between the chair (resistant) & boat (low resistance).

2020-09-09

Very easy to use and plenty of pieces, so you don't fall short when building compounds. It helps when visualizing the structure of elements and especially when producing constitutional isomers of compounds.

— Savanna
— Indigo:

It you ever need to augment this set, we carry a complete line of atoms and bonds & you can use our 3D Molecular Model Builder to determine what you need.

2020-08-30

Just as described. Super fast shipping!!!

— SV
2019-10-23

It is a solid product that is easy to work with. The pieces do not get too stuck together nor do they fall apart from each other. It is helpful to have in lecture, and I'd buy more from them if I needed to.

2019-10-02

We ordered ten new sets and a bunch of spare bonds. Came very quickly (like next day!) Staff were super helpful when I called to order.

— KS
— Indigo:

Glad we could help!

2019-01-29
Model kit came exactly as expected, and it came fairly quickly. Would recomend for organic chemistry students.
— Kgreen
2017-09-25
Really helpful for organic chemistry courses. A little bit hard at first and had some edges that I had to file.
— HH
— Indigo: The bonds are a tight fit initially but this ensures that the models still hold together well in 4 years! A little bit of dish soap is the simple fix.
2017-04-05
Our school purchased a couple of class sets from Indigo. They were nice enough to look at our original order, and offer an alternative that gave us the same number of pieces but at a reduced cost. They also worked with us to modify the contents so that we could get more of a certain type of atom than was originally listed. Overall, a great experience.
— rguinn
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