Transition Metals - isomerism - shapes of complex ions Flashcards
1
Q
what two types of isomerism to transition metals show ?
A
- cis-trans isomerism
- optical isomerism
2
Q
what is optical isomerism
A
type of sterioisomers (same structural formulas but different arrangement in space), they are mirror images of each other and are non-superimposable
3
Q
what types of complexes show optical isomerism and what ligands do they have
A
octahedral complexes with 3 bidentate ligands.
4
Q
what types of complexes show cis-trans isomerism
A
- octaheadral shapes with 4 ligands of the same type and 2 different.
-square planar complexes with 2 ligands of the same type and 2 ligands of a different ype.
-both with monodentate ligands.
5
Q
what are trans isomers
A
when the 2 different ligands are opposite each other.
eg- trans-[Cr(H2O)4Cl2]+
6
Q
what are cis - isomers
A
if the 2 different ligands are adjacent to each other.
eg = Cis-[Cr(H2O )4Cl2]+
7
Q
which isomer of as square planar is used in medicine
A
cis - [Pt(NH3)^2Cl2] (aq)
cis-platin cures cancer, trans-platin doesn’t.
