Question

The following 1H NMR absorptions were obtained on a spectrometer operating at 300 MHz. Convert the chemical shifts from delta units to hertz downfield from TMS.

(a) 2.1 δ
(b) 3.45 δ
(c) 6.30 δ
(d) 7.70 δ

Answer 1

Hey dude, it's your boy Mr. Mamiza, the comedian with all the science facts. Today we're gonna talk about converting chemical shifts from delta units to hertz downfield from TMS.

Here's the deal: we got these NMR absorptions, and they're measured in delta units, but we want to convert them to hertz.

So, to do that, we got to use some math. We take the delta value and multiply it by the spectrometer frequency, which is given as 300 MHz.

Let me give you some examples:

For (a) 2.1 δ, we multiply 2.1 by 300, which gives us 630 Hz downfield from TMS.

For (b) 3.45 δ, we multiply 3.45 by 300, which gives us 1035 Hz downfield from TMS.

For (c) 6.30 δ, we multiply 6.30 by 300, which gives us 1890 Hz downfield from TMS.

And for (d) 7.70 δ, we multiply 7.70 by 300, which gives us 2310 Hz downfield from TMS.

And that's it, yo! It's just some simple math, and now you know how to convert those delta units to hertz downfield from TMS. Keep it science-y, and I'll catch you on the flip side!