University:
Purdue University
Course:
CHM 62100 | Advanced Analytical Chemistry
Academic year:

2019
Views:

167

Pages:

10
Author:

do3ran7ut

Rotation, length, strength differences Differences between sigma bonds and pi bonds questions • What are the Possible Combinations of Orbitals in Sigma Bonds? • The three most common overlap conditions that result in sigma bonds are: 1.s-s overlap 2.s-p overlap 3.p-p overlap What is the Number of Sigma and Pi bonds in a Benzene Molecule? • The benzene ring consists of six carbon-carbon single bonds, all of which are sigma bonds. Additionally, there exist six carbon-hydrogen sigma bonds. Therefore, the total number of sigma bonds in a benzene molecule is 12. The aromatic features alternating double bonds between carbon atoms. Therefore, the total number of pi bonds in a benzene molecule is 3. Lone pairs You also need to be able to know what are lone pairs of electrons and how to identify how many lone pairs is present in a molecule Lone pairs are pair of valence shell electrons that did not take part in the covalent bond to form the molecule. However if you take that formed molecule and react it with another substance the lone pair becomes essential as it will participate in the chemical reaction. How much lone pairs and bonded pairs does water have? Lewis structure of atoms Bohr Model Lewis structures of atoms • The lewis structures for atoms only show the valence shell with the valence electrons and the symbol for the element. Know how to draw them.