Bonding (Inorganic)

what is the lewis model

things find their octet, mainly used for dot and cross diagrams

what is valance bond theory

Valence bond theory was the first quantum mechanical theory of bonding. It expressed Lewis' ideas of covalent bonding in terms of wavefunctions

in VBT what is the wavefunction when atoms are so far away they do not interact

what is the VBT of a wavefunction for two hydrogens whuch interact

where lambda is less than 1 as there is additinal e- — e- repulsion (these are due to us not being able to tell the electrons apart when bonded

how should the equation of VBT wavefunction be interpreted

shows the weighting of the covalent and ionic nature of the bond. the overall bond is a hybrid of all of them

draw two sp hybrids bonding

in MOT what is the equation for the in phase and ot of phase orbitapu

for out of phase it would be negative

use ψ2 to explain the bonding and antibonding interactions

when its positive the electron density between the nucleii increases when its negative the elctron density is less

for MOT draw the radial plots

How would you go about breaking a bond

absorbing energy to promote an electron so that the bond order is 0

For MOT explain the differences in radial plot for differnt sized atoms

when a larger atom is used there is less overlap

what are the two symetry labels

g for the same and u for different

when would you use symetry laybels

when the two sides are the same atom

comment on the strength of diamagnatism and paramagnatism

diamagnatism is weaker (this is in all molecules however only observable in the absence of other magnatic effects

explain s-p mixing

orbitals with the same symetry always repel if they are closer they will repel more

what does s-p mixing result in

the botom sigma set are stabilised and the top one is destabalised above the pi set. this also results in dotted lines from all the orbitals to make4 them

where does s-p mixing stop occuring

at oxygen

whats notable about the hydrogen AO s

the 1s orbital is around the same energy as the flouring p orbitals

Describe the bonding in XeF2 using MOT

imaginf the p orbitals draw the bonding non bonding and antibonding interactions

descibe the bonding in PF5

equatorial think of sp2 hybridisation then the equatorials is like that in XeF2

describe the bonding in B2H6