Answer to Question #157612 in Physical Chemistry for lily

Question

Explain how the DEPT spectrum can aid structure determination?

Answer 1

Structure determination is a procedure by which the three-dimensional atomic coordinates of a molecule or biomolecule are solved using an analytical technique. Many techniques are used in structure determination, most commonly X-ray crystallography, NMR spectroscopy, electron microscopy and molecular modelling.

Distortionless enhancement by polarization transfer (DEPT) is an NMR method used for determining the presence of primary, secondary and tertiary carbon atoms. ... Signals from quaternary carbons and other carbons with no attached protons are always absent (due to the lack of attached protons).Mass spectrometry is used to determine the molecular mass of an organic compound. ... This causes electrons to be ejected from molecules in the sample, leaving them as positively charged cations � the molecular ion or parent ion.