CHEM 14C Lecture Notes - Lecture 1: Trigonal Planar Molecular Geometry, Sigma Bond, Octet Rule

• School: UCLA
• Department: Chemistry and Biochemistry
• Course: CHEM 14C
• Professor: Castillo

Document Summary

Lecture 1 organic chemistry representations- rules carbons do not always have to be written as c hydrogen can be omitted only if carbon not written as c all other atoms must always be shown. Is a covelent bond (electron pair shared by two atoms) Follow octet rule except for h which is a duet. High electron density = red, low = blue. Hybridization: mixture of atomic orbitals to form hybrid orbitals. 2s 2p 2p 2p -> sp3 sp3 sp3 sp3. Count the number of atoms connected and add each lone pair. This will give the number of hybrid orbitals. Ex: oxygen in water: 2 atoms connected + 2 lone pairs = 4 = sp3. 3 ; trigonal planar ; sp ; 120 . Bonding single bond = ; double = and ; triple = and 2 ( ) sigma bonds: strong bonds because of the overlap or connection between the atoms is maxima.