Chapter 22, Problem 82IP

Interpretation Introduction

Interpretation: The structure of piperazine with molecular formula ${\text{C}}_{\text{4}}{\text{H}}_{\text{10}}{\text{N}}_{\text{2}}$ that exhibits two signals in its proton NMR spectrum has to be drawn.

Concept introduction:

The arrangement of atoms that are bonded together determines its constitution and molecular formula of that particular compound.  This concept is referred as structural isomers or in more modern term constitutional isomers.  Each atom has a typical valency or valence which is defined as the ability of an atom to form a chemical bond with other atoms.  For example, carbon has four valence or tetravalent that means carbon has the capacity to form four bonds with other elements or other atoms.  Nitrogen atoms are trivalent whereas hydrogen atoms are monovalent in nature.

In proton NMR, the signals are based on the arrangement of hydrogen atoms that are connected to carbon or nitrogen atoms.

To find: Draw the structure of piperazine with molecular formula ${\text{C}}_{\text{4}}{\text{H}}_{\text{10}}{\text{N}}_{\text{2}}$ that exhibits two signals in its proton NMR spectrum

Find the valency for carbon (C), hydrogen (H) and nitrogen (N) in ${\text{C}}_{\text{4}}{\text{H}}_{\text{10}}{\text{N}}_{\text{2}}$