OCR A Chemistry – 6.3.2 NMR spectroscopy

WHICH of the following is the reason for peaks in NMR spectra?

• functional groups

• electrons

• bonds

• nuclei

Tags

NGSS.HS-PS1-8

A molecule contains 6 unique hydrogen environments.

Give the number of peaks in its proton NMR spectrum.

(a)  

The number of peaks in an NMR spectrum depends on the number of _______ _____________ in a molecule?

(a)  

Write the adjective that is used to describe the SOLVENTS used in proton NMR spectroscopy.

(a)  

Write the CHEMICAL SHIFT VALUE (ppm) of the methyl carbon environment in tetramethylsilane,

to 1dp

(do not include the ppm units)

(a)  

WRITE THE NAME of the splitting pattern

for the H–N or H–O environment.

(a)  

Most aromatic hydrogens (H–benzene) will give a splitting patter in the 6.2–8.0 ppm range.

NAME THE SPLITTING PATTERN.

(a)  

WRITE THE FORMULA of the chemical that is used to detect peaks that come from a H–N or H–O environment.

(a)  

In ¹³C NMR spectra, there can often be a peak at 77 ppm.

This peak does not come from the molecule being investigated.

WRITE THE FORMULA of a molecule that could give this peak.

(a)  

A molecule contains the structural feature:

...CH–(CH₃)₂

WHICH PAIR of peaks will be seen somewhere in its ¹H NMR spectrum?

• singlet

• doublet

• triplet

• quartet

• septet