[radical]

Hey guys, I'm just wondering what the coupling in this H1 NMR is. I'd say a doublet of quartets - 1st quartet is peaks 1, 2, 3 and 5. 2nd quartet is peaks 4, 6, 7 and 8. However this doesn't make sense with the rest of the spectrum so I think I must have got this wrong. Any ideas what else it could be?

[Babcock_Hall]

Is it possible that you have two quartets that overlap somewhat?

[Dan]

I'd say a doublet of quartets - 1st quartet is peaks 1, 2, 3 and 5. 2nd quartet is peaks 4, 6, 7 and 8.

That's what it looks like to me too.

However this doesn't make sense with the rest of the spectrum

How so?

Can you give more structural details?

[ATMyller]

Looks like a doublet of quartets to me, but in theory could also be two separate doublet of doublets. Do you have integration values for the peaks?

[Irlanur]

I'd go for a doublet of quartets or very bad luck.

[Babcock_Hall]

If one had two ethyl groups that had similar chemical shifts, it seems to me that one would see two quartets close together.