functional group wave numbers

[WhiteWashed]

---

Members do not see this ad.

Hey guys, can anyone help me by listing the functional group wavenumbers we should memorize? EK only mentions carbonyl at 1700, and alcohols at 3200-3600 Cm-1. Any help future doctors?

 

[WhiteWashed]

Hey guys, can anyone help me by listing the functional group wavenumbers we should memorize? EK only mentions carbonyl at 1700, and alcohols at 3200-3600 Cm-1. Any help future doctors?

anyone???....cricket,cricket....

 

[BerkReviewTeach]

anyone???....cricket,cricket....

Perhaps no one is responding because that's basically all you need. In BR lectures, they give those two along with a way to estimate any others if you absolutely have to. But those are the only two numbers to commit to memory. Maybe knowing C-H is just below 3000 for an alkane and just above 3000 for an alkene might help, but I couldn't see any other absorbances mattering.

 

[NYR56]

Hey guys, can anyone help me by listing the functional group wavenumbers we should memorize? EK only mentions carbonyl at 1700, and alcohols at 3200-3600 Cm-1. Any help future doctors?

If that is all that is in the review books, then that is all you need to know. The MCAT is not out to test if you have memorized random things and is much more of a analytical exam. Don't waste time trying to memorize extra information.

 

[WhiteWashed]

If that is all that is in the review books, then that is all you need to know. The MCAT is not out to test if you have memorized random things and is much more of a analytical exam. Don't waste time trying to memorize extra information.

thanks guys!

I looked it up and here is some other info to keep in mind

C=0 at 1700-Must know!
O-H at 3200-3600 Must know! STrong and braod signal
N-h at 2500-3200 good to know...moderate and broad
alkene at 1650-sharp!
aklyne at 2200
nitrile at 2250
sp3 c-h at 2850-3000
sp2 c-h at 3000-3150
sp c-h at 3300
annnnd I believe the c-0 is at 1100

 

[NYR56]

I just took a look, page 93 in the EK Orgo book is pretty much what you need to know. Remember the general patterns, there aren't too many there.

 

[MilkIsGood]

I just took a look, page 93 in the EK Orgo book is pretty much what you need to know. Remember the general patterns, there aren't too many there.

im guessing NMR numbers arent important either?

 

[NYR56]

im guessing NMR numbers arent important either?

Nope, just know the 9.5 shift for aldehydes.