Use Hund's Rule and Orbital Diagrams to Describe

The central themes of both theories b. This book is ideal for who want to use a strong molecular-orbital approach to explain structure and reactivity in inorganic chemistry.

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Hence cyclobutadiene is non-aromatic.

. Orbitals on the same energy level will fill singly before doubly. The strain of the asymmetric configuration outweighs the anti. Again we fill the lowest-energy molecular orbitals first while being sure not to violate the Pauli principle or Hunds rule.

Remember me on this computer. The octet rule is a chemical rule of thumb that reflects the theory that main-group elements tend to bond in such a way that each atom has eight electrons in its valence shell giving it the same electronic configuration as a noble gasThe rule is especially applicable to carbon nitrogen oxygen and the halogens but also to metals such as sodium or magnesium. Close Log In.

This reduction of symmetry lifts the degeneracy of the two formerly non-bonding molecular orbitals which by Hunds rule forces the two unpaired electrons into a new weakly bonding orbital and also creates a weakly antibonding orbital. Compare and contrast the VB theory and the MO theory by discussing the following. Just like with electron configuration MO diagrams will always fill the same way.

Enter the email address you signed up with and well email you a reset link. Log in with Facebook Log in with Google. The VSEPR theory f.

We can use energy-level diagrams such as the one in Figure PageIndex2 to describe the bonding in other pairs of atoms and ions where n 1 such as the H 2 ion the He 2 ion and the He 2 molecule. This applies primarily to the pi and pi orbitals where one electron will go into each orbital before filling in the second.

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