Question

Brief of VESPER theory with example also.​

Answer 1

Explanation:

Valence shell electron pair repulsion theory, or VSEPR is a model used in chemistry to predict the geometry of individual molecules from the number of electron pairs surrounding their central atoms.It is also named the Gillespie-Nyholm theory after its two main developers, Ronald Gillespie and Ronald Nyholm. The premise of VSEPR is that the valence electron pairs surrounding an atom tend to repel each other and will, therefore, adopt an arrangement that minimizes this repulsion, thus determining the molecule's geometry. Gillespie has emphasized that the electron-electron repulsion due to the Pauli exclusion principle is more important in determining molecular geometry than the electrostatic repulsion.

Answer 2

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Here is your answer

VESPER theory :

This theory was proposed by sidwgick and Powell later developed by Gillespie and Nyholm

Postulates :

» The shape of the molecule is determined by repulsion between electron pairs in the valence shell of the central atom

» a lone pair of electron occupies more space around the central atom than the bond pair of the electrons

» the electron pair oriented around the central atom in such a way that the repulsions among them are minimum

» The order of repulsions between different bonds

Triple >double >single

»the order of repulsion among different electron pairs

Lone pair -lone pair >bond pair -lone pair >bond pair - bond pair

» the magnitude of repulsion between Bond pair electrons depends on electronegativity difference between central atom and bonded atoms