Nmr

[laya533]

---

Members don't see this ad.

THis Q if from aamc6:
How many peaks does tert-butyl methyl ether have and why? thank in advance.

 

[Daichi Katase]

2 singlets?

 

[Booyakasha]

Yes, two singlets. The non-equivalent methyl groups are in separate spin systems due to the placement of the oxygen atom and the lack of structural rigidity. Since the methyl groups in the tert-butyl group are equivalent due to rapid rotation of the molecule, they do not couple with one another. Hence, two singlets with a ratio of 3:1. The methyl group on the oxygen will be further downfield/more deshielded. A copy of the spectrum can probably be found here:

http://www.aist.go.jp/RIODB/riohomee.html

(click on Integrated Spectral Data Base System for Organic Compounds (SDBS))

P.S. this is a great site, especially for we organic chemists!! bookmark it for future reference.

 

[Booyakasha]

C13-- 3 peaks

 

[Preppy]

http://www.aist.go.jp/RIODB/riohomee.html

(click on Integrated Spectral Data Base System for Organic Compounds (SDBS))

P.S. this is a great site, especially for we organic chemists!! bookmark it for future reference.

SDBS freakin rules! Great for solving unknowns in lab when you have an NMR/IR.

 

[stoleyerscrubz]

I love that site. Wish I knew about it at the beginning of Orgo II instead of in the midddle of it!

SDBS freakin rules! Great for solving unknowns in lab when you have an NMR/IR.