CHEM 101 Study Guide - Midterm Guide: Sirius, Cumulene, Sporting De Gijón B

• School: UPenn
• Department: Chemistry
• Course: CHEM 101
• Professor: Pietrovito Anthony J.

Document Summary

Make an octet structure with the species that has one more electron. Make usual lewis structure with even number of electrons. Then, look for places where you can remove an electron. Lone pair regions are the same, so it doesn"t matter which one you take from. Must have at least a double bond for you to take away an electron. All the possible structures you end up with are the resonance structures. So, there is a resonance structure for removing an electron from each bonding region and each lone pair region per atom. Note you may end up with a fractional bond order. When calculating formal charge for an atom with a fractional bond, the bond counts as x. 5 bonds. 1 alone electron counts the same as an electron pair. Lewis for bv and mo energy level diagram for mo. For vb paramagnetism can only arise with an odd number of electrons.