2.5 Transition Metals Flashcards
(35 cards)
Define a transition metal
forms at least one stable ion with a partially filled d subshell
Properties of transition metals
- form complex ions
- form compounds that are coloured
- compounds can act as a catalyst
- metal in compounds formed can have variable oxidation states
What is a ligand and a bidentate ligand
A Ligand is an ion or molecule with a lone pair of electrons which can form a coordinate bond with a transition metal ion.
bidentate ligand has two atoms that each donate a lone pair of electrons
What is the only transition metal that is square planar
Cis-platin
Draw monodentate ligands [Cu(H2O)6]^2+ and [CuCl4]^2-
Draw the bidentate and multidentate ligands of [Ni(H2NCH2CH2NH2)3]^2+ and EDTA4-
Show ligand substitution reaction of [Cu(H2O)6]^2+ converted into [Cu(H2O)2(NH3)4]2+
What is the chelate effect
The chelate effect occurs when a monodentate ligand is substituted by a bidentate or a multidentate ligand.
Structure of haemoglobin
What do you need to know about haemoglobin
What is amenia
What is a cis isomer and what is a trans isomer
How can optical isomers form in complex ions
You need an octahedral complex which has at least two bidentate ligands
Cis isomer can form an optical isomer
Structure of haemoglobin
Which light has low or high energy
ROY = Low
BIV = High
What happens when electrons are excited in d-orbitals
What is the difference of a transition metal having a high ionisatio and low ionisation energy
What can alter the change in colour of a transition metal
What is the difference of a transition metal having a high ionisatio and low ionisation energy
How does a colomiter work
Ignore the examples bit at the end
What is meant by the number on transmittance reading in colorimetry
Experimental method of colorimetry
What is meant by a heterogeneous and homogeneous catalyst
Heterogeneous - where catalyst is in a different phase to the reactants
Homogeneous - where catalyst is in same phase as reactants
