105.Resonance(2)

In the last post we studied what resonance means and how resonating structures blend to give the resonance hybrid structure. In this post we shall further look into the concept of resonance. Facts about resonating structures –  All the resonating structures are imaginary and have no real existence. All resonating structures contribute to the actual…

104.Resonance(1)

From this post onwards, we shall start discussing a phenomenon, which manifests itself in many compounds and which is responsible for deviations in structure, properties and reaction mechanisms of organic and inorganic species. Many a times , it is not possible to define structure of a molecule using just one Lewis structure. There are many…

103.CHEMICAL BONDING (50)- Practice Problems.

Q:  Why is o- hydroxy benzaldehyde a liquid whereas p-hydroxy benzaldehyde a solid , with high MP, at room temperature ? A: o- hydroxy benzaldehyde has intramolecular H- bonds and so the molecules are not very tightly bound to each other as in the case of p-hydroxy benzaldehyde , where, the intermolecular H-bonds hold molecules…

102.CHEMICAL BONDING (49)- Secondary bonding(6)- Hydrogen Bonding (4)

We continue to study the physical manifestations of H- bonds and their importance. Protein folding Hydrogen bonds are an integral part of the protein structure. We will study the protein structure in detail in later posts. Here, we just need to know that proteins are made of amino acids(aa). As the name suggests, amino acids…

100.CHEMICAL BONDING (47)- Secondary bonding(4)- Hydrogen Bonding (2)

I take immense pride in writing the 100th post on this blog. I am glad that I could continue writing throughout my pregnancy, after my daughter was born and today when she is 15 months young.Looking after her single-handedly and writing was a tough task! If not for my husband, I could not have thought of continuing…

99.CHEMICAL BONDING (46)- Secondary bonding(3)- Hydrogen Bonding (1)

In this post we start discussing a type of secondary bonding, without which life would not be possible !! How is hydrogen bonding and life on earth related? Water molecule has hydrogen bonds in it.Without these bonds water would not  have the properties it possess. It would not be a universal solvent and would not…

97.CHEMICAL BONDING (44)- Secondary bonding(1)- Dipole dipole interactions.

We have already seen in post # 54 that the main difference between primary and secondary bonding is that in secondary bonding THERE IS NO SHARING OR TRANSFER OF ELECTRONS. Primary bonding Secondary bonding sharing or transfer of electrons. NO sharing or transfer of electrons. Strong force of attraction Weak force of attraction Short range Long…