CHEM 101 Chapter Notes - Chapter 6: Parallelogram, Vsepr Theory, Trigonal Pyramidal Molecular Geometry

• School: Drexel University
• Department: Chemistry
• Course: CHEM 101
• Professor: King Daniel

Document Summary

6. 3 wriing lewis structures for molecular compounds and polyatomic ions steps for wriing lewis structures for molecular compounds: write the correct skeletal structure for the molecule. Move lone electron pairs from terminal atoms into the bonding region with the central atom: check count the number of electrons, ensuring the total matches the number from step 2. When formal charge cannot be avoided, negaive formal charge should reside with the most electronegaive atom charges on adjacent atoms should not have the same sign. 6. 5 excepions to the octet rule: odd electron species, incomplete octets, and expanded. 180 bond angles trigonal planar geometry: three electron groups around the central atom. 120 bond angles tetrahedral geometry: four electron groups around the central atom. 109. 5 bond angles trigonal bipyramidal geometry: ive electron groups around the central atom. 120 bond angles between the equatorial posiions three bonds in the trigonal plane.