With the help of suitable diagrams, explain the synergic bonding in metal carbonyls

 Which ones of the following species will exhibit inorganic aromaticity:
a) S N b) S N c) S N 3 3 4 5 3 5
  ? Justify your answer.

Explain the trends in melting points of alkali, alkaline earth and transition metals of
fourth, fifth and sixth periods along with suitable illustration.

What is Jahn Teller effect? As a manifestation of it show why high-spin d

Give an example of a transition metal-dinitrogen complex. Give suitable chemical equation for
its preparation. In what fashion can the two metal atoms be bridged by dinitrogen? What
happens when the dinitrogen ligands bind in side-on mode? Gives suitable diagrams.

 Give the second postulate of VSEPR theory. Predict at the structure of the molecule
sulfur tetrafluoride with the help of VSEPR theory. Draw the structure.

With the help of suitable chemical equations explain how the mixed-substituent
polymers of phosphazenes are synthesized?