Chapter 20, Problem 77IP

Interpretation Introduction

Interpretation:

The spectroscopic structure identification for given corresponding molecular formula should be draw and identified.

Concept Introduction:

IR Spectra: This important tool of structure analysis different organic molecules and its functional groups. (or) To determine the functional groups present in the given organic compound sample by absorbing frequency in particular range with respect to the group present in the given sample.

IR Wavenumber ( $c{m}^{-1}$): This number of waves in one centimeter and has units of reciprocal centimeters. The wavenumber is inversely proportional to wavelength, it is directly proportional to frequency and energy which makes it more convenient to use.

NMR Spectroscopy: NMR spectroscopy commonly known as MRI (Magnetic Resonance Spectroscopy), it is important Research tool of analysis for different organic molecule and its structures. (or) In other words hydrogen nuclei have spin (odd value) and all nuclei ae electrically charged. The extremal magnetic field is applied an some energy transfer is possible between the lower energy to excited level.

${}^{13}C$NMR Spectroscopy: This type of NMR splitting of signals tells us numbers of hydrogens atoms are attached to each carbon. The triangle rule $\left(n+1\right)C$. The chemical shift explains the different hybridization $\left(sp3,sp2,sp.,\right)$ of each carbon atoms. Moreover the chemical shift in carbon NMR spectra arises in the same way as in the ${}^{1}H$NMR spectrum.

To find: The molecular formula for the given molecule (a)