NMR 1 Flashcards
Organic chemistry can be considered in 3 steps, name and describe them
1) Synthetic strategy - Reactants are mixed and allowed to react
2) Purification step - Products are separated
3) Identity of product/analysis
Light is a form of energy known as electromagnetic radiation. TRUE or FALSE
TRUE
Type of light is dependent on … ?
Wavelength
Waves can be measured as frequency (v) in sec-1. TRUE or FALSE
TRUE
What is a particle of light known as ?
A photon
frequency = speed of light (c) / wavelength. TRUE or FALSE
TRUE
Describe the electromagnetic spectrum
Different wavelength = different frequency = different energy
NMR uses lower wavelength radiation than IR. TRUE or FALSE
FALSE. NMR uses higher wavelength radiation than IR
NMR has lower energy spectroscopy than IR. TRUE or FALSE
TRUE
As wavelength increases, frequency decreases and radiation energy decreases.TRUE or FALSE
TRUE
Different chemicals absorb energy at different wavelengths. TRUE or FALSE
TRUE
NMR is the same as MRI in medicine. TRUE or FALSE
TRUE
In NMR machines, the bigger the magnet the more information ca be gotten from a sample. TRUE or FALSE
TRUE
Name a technique used for dealing with multiple samples ?
Automated NMR
Describe NMR in 3 steps
1) Molecule is placed in a strong magnetic field
2) Radio frequency radiation causes excitation in atomic nuclei
3) This provides info about the molecular skeleton
