What are the chemical shifts in C-13 NMR?

What are the chemical shifts in C-13 NMR?

A table of typical chemical shifts in C-13 NMR spectra carbon environment chemical shift (ppm) C=O (in ketones) 205 – 220 C=O (in aldehydes) 190 – 200 C=O (in acids and esters) 160 – 185 C in aromatic rings 125 – 150

Which is the chemical formula for p-cresol?

P-Cresol PubChem CID 2879 Structure Find Similar Structures Chemical Safety Laboratory Chemical Safety Summary (LCSS Molecular Formula C7H8O or CH3C6H4OH Synonyms P-CRESOL 4-Methylphenol 106-44-5 4-Creso

Which is the unstructured region of a 13 C NMR?

In general, when you state analyzing a 13 C NMR, split the spectrum in two parts by drawing a line at 100 ppm; below this value you have the saturated functional groups, and beyond that is the unstructured region. So, saturated carbon atoms connected to electronegative heteroatoms give signal from 30-90 ppm.

How are the different types of cresols different?

There are three forms of cresols that differ slightly in their chemical structure: ortho-cresol ( o-cresol ), meta-cresol ( m-cresol, and para-cresol (p-cresol). These forms occur separately or as a mixture. Cresols are used to dissolve other chemicals, as disinfectants and deodorizers, and to make other chemicals.

Which is the right side of the NMR spectrum?

The right side of the spectrum is the low energy region ( upfield) and the left side is the high energy region ( downfield ). This might be a confusing terminology and we talked about its origin in earlier, so read that post if you need to know more but you definitely need to remember that:

What is the NMR spectrum for 1-methylethyl propanoate?

The C-13 NMR spectrum for 1-methylethyl propanoate 1-methylethyl propanoate is also known as isopropyl propanoate or isopropyl propionate. Here is the structure for 1-methylethyl propanoate: Two simple peaks There are two very simple peaks in the spectrum which could be identified easily from the second table above.

Which is higher downfield or upfield in NMR?

Downfield means higher energy – left side of the spectrum (higher ppm) Upfield means lower energy – right side of the spectrum (lower ppm) Let’s start with the chemical shift of protons of alkyl C-H groups. The Chemical Shift of Connected to sp3 Hybridized Carbons