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June 19, 2012 - PRLog -- Organic Chemistry is a highly organized discipline.  It is the study of the relationship between the structures of molecules and their reactions. We will begin our study with the type of bonding and structural aspects of the molecules.  You are already familiar of the Atoms and Molecules course that the compounds can be broadly divided into two classes, ionic and', covalent. Ionic compounds are composed  o f  positively  and negatively  charged ion;  which  a r e  held together  by  electrostatic forces.  Since ions can be regarded as spheres having symmetrical distribution of charge, no particular direction can be assigned to such type of bonding.  For  example, in  NaCl lattice,  N a +  and C1-  ions  are held  together by  electrostatic forces;  n o  N a +  ion can  be regarded  as bonded  t o  a  particular C1- ion.  In other words, there is no such entity which can be called as NaCl molecule.

In fact, the electrostatic forces operate between a particular ion (Na') and all its neighboring ions (Cl-) of opposite charge.  On the other hand, in covalent compounds, molecules are the structural units.  In contrast-to the ionic compounds, in covalent compounds, the molecules are formed by the sharing of electron pair(s) between the constituent atoms. The bonds formed by’ sharing of pair@) of electrons are called covalent bonds.  Since in  organic compounds, the bonds  formed  by carbon a tom  are covalent  in  nature, we  will study some features of  the covalent bonding  in  detail. We will then explain shapes of molecules using the concept of hybridization. We shall  also learn various  types  of  functional groups present  in ' organic compounds and  classify these  compounds  into various  classes on the  basis of  the functional groups.  Finally, we will study, how to name the compounds &longing to various classes.

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