Lecture Two Flashcards
What 3 things does the choice of geometry depend on
1 metal and its oxidation state
2 number and types of ligands
3 steric effects
What side of the periodic table are high coordination numbers most common in
left hand side
Why is there high coordination numbers on the left hand side
less d electrons binds to more ligands
Where on the periodic table are low coordination numbers are found
the right hand side
What does larger ligands do
they favour lower coordination numbers
What does higher charged ligands do
favour lower coordination numbers than neutral ligands
What geometry does a ligand with a coordination number of 2 have
linear
What geometry does a ligand with a coordination number of 3 have
trigonal planer
What geometry does a ligand with a coordination number of 4 have
tetrahededral and square planer
What is a property of square planar
the metal and all four ligands lie in the same plane
What geometry does a ligand with a coordination number of 5 have
trigonal bi-pyramidal
What geometry does a ligand with a coordination number of 6 have
octahedral
What does the dash line mean in VSEPR structures?
bond going away from you
what does the wedged line mean in VSEPR structures?
bond coming towards you
Define isomers
same molecular formula but different structural formula
what are the two branches of stereo isomers
geometric and optical
Define optical isomerism
Non-superimposable on their image - enantiomers
Define stereoisomer
same bonds different spatial arrangements
Are their any possible isomers for linear and trigonal planar shapes
no
Why are there not any possible isomers for trigonal planar and linear
they both have a plane of symmetry
What 2 things causes the possibility of isomers
Having a central atom with more than 3 ligands
more ligands and types of ligands
Does tetrahedral compounds have isomers
yes
What isomer does tetrahedral compounds contain
optical isomers - enantiomers
Does square planar have any isomers
yes
