Gen Chem review from 9/24/276

Gen Chem

What are the 3 rules Dr. Garr suggests for O Chem

1. Carbon likes 4 bonds

2. Negatvie things like Positive things

3. Resonance = stability

What are the types of intermolecular forces

• Dipole-dipole

• Dispersion Forces

• Ion -Dipole forces

What are dipole-dipole forces

Molecules with partial charges

What do dipole-dipole charges include

• polar molecules

• Hydrogen bonds

What are dispersion forces

when molecules interact and electrons move to one sied, creating brief charges

What are dispersion forces important with

large, heavy, non-polar charges

What are ion-dipole forces

when ions and heavy molecules interact

What is an ion

a charged molecule: when the protons and electrons are not equal

What is it called if there are 2 bonds around the central atom

linear

what is it called if there are 3 bonds aroung the central atom

trigonal planar

What is it called if there are 4 bonds around the central atom

tetrahedral

How do you calculate the formal charge

Valence elctrons - dots- lines

What is it called when 2 s orbitals bond

sigma bond

What is it called when 2 p orbitals bond horizontally

sigma bond

What is it called when 2 p orbitals bond vertically

pi bonds

What orbital is tetrahedral

sp³

What orbital is linear

sp

what orbital is trigonal planar

sp²

what is more favoreable the bond or anti bond

the bond

What goes on top in the MO diagram

the anti-bond

What happens in the anti bond

the two atoms repel eachother

what is the LUMO

the lowest unocupied molecular orbital

what is the HOMO

the highest ocupied molecular orbital

how do you calculate bonding order

(bonding electrons - anti bonding electrons) / 2

what will the bonding order always be equal to

the amount of bonds between your two atoms

How do you know if its sp³, sp², sp

you look at how many bonds are on Carbon and sub tract 1

What row always uses hybrid orbitals

the 2nd row

If there are more than one bond, what is the 1st bond always going to be

a sigma bond

if there is more than 1 bond, what is the second bond always going to be

pi