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A level chemistry
A level chem Module 5
Transition elements
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Cards (34)
What is a transition metal?
A metal that forms
stable ions
with a
partially filled subshell
What is a d block element?
Elements with their
highest energy electron
resides in a
d orbital
What is a ligand?
A
molecule
that
donates
an
electron pair
to a
transition metal
What is a bidentate ligand?
A ligand that donates
two pairs
of
electrons
to a
transition metal
What is a monodentate ligand?
A ligand that is able to
donate one pair
of
electrons
to a
transition metal
What is a cis-trans isomerism?
Where the
two identical ligands
are next to
each other
(
cis
) or
opposite each other
(
trans
)
What is optical isomerism?
Where
two molecules are non-superimposable mirror images
What is an example of a cis-trans square planar complex?
Cisplatin
and
transplatin
How is cisplatin used as anti-cancer drug/
Undergoes
ligand
substitution reaction where guanine replaces
chlorine
preventing
DNA
replication
How to name transition metal complexes
- Identify
ligands
in order
- Identify number of ligands and use prefixes
mono
,
di
- Place ligands in
alphabetical
order
- If positive, use TM name and numeral
- If negative, use
-ate
name
Negative transition metal names for copper, silver and iron
Cuprate
Arganate
Ferrate
Name two bidentate ligands
Ethandioate
and
1,2 diethylamine
Formula for ethandioate
[C2O4]4-
Formula for 1,2-diethylamine
H2NCH2CH2NH2
What colour is Cu2+(aq)?
Pale blue
solution
What colour is Cu2+(aq) when OH is added?
Cu(OH)2
-
blue
precipitate
What colour is Cu2+(aq) in excess OH?
Deep blue solution
What colour is Cu2+(aq) in excess NH3?
Dark blue
solution
What ion is formed from adding excess HCl to Cu2+(aq)?
[
CuCl4
}
2-
What colour is [CuCl4]2-(aq)?
Yellow
What colour is Mn2+(aq)?
Pale pink
What colour is Mn2+(aq) when OH is added?
Light brown
What colour is Mn2+(aq) when excess OH is added?
Dark brown
What colour is Mn2+(aq) when NH3 is added?
Light brown
What colour is Mn2+(aq) when excess NH3 is added?
Dark brown
What colour is Fe2+(aq)?
Pale green
What colour is Fe2+(aq) when OH is added?
Green precipitate
What colour is Fe3+(aq) ?
Yellow
What colour is Fe3+(aq) when OH is added?
Orange-brown
What colour is Cr3+(aq)?
Purple
What colour is Cr3+(aq) when OH is added?
Grey-green
What colour is Cr3+(aq) when excess OH is added?
Dark green
What colour is Cr3+(aq) when NH3 is added?
Grey-green
What colour is Cr3+(aq) when excess NH3 is added?
Purple