(Original post by whotosee)
I got the question from this question pack someone else put up so I'm not sure if it's the whole question:
Describe the types of stereoisomerism found in transition metal complexes.
Use suitable examples to illustrate your answer.
Quality of Written Communication 
[Total 9 marks]
(Cis/trans) + Examples (must be 3-d drawings) 2
Correctly labelled as cis and trans (allow this mark if diagrams are planar) 1
Cis has same atoms at 90° + Trans has same atoms at
180° (need reference to bond angles for mark) 1
(Optical) + examples (must be 3-d drawings) 2
Rotate plane polarised light (by same number of
degrees) in opposite directions 1
Non-superimposable mirror images 1
NB If use H3N CH2 CH2 NH3 penalise only once
Any example which show the principle of cis/trans isomerism and optical
isomerism are fine but, all diagrams must be 3-d. The shapes shown in the
previous question are allowed for octahedral or tetrahedral. For square planar
complexes used to illustrate cis/trans isomerism the following illustrations
are fine. For optical isomerism, there must be a mirror line and the isomers must
be non-superimposable object/mirror images.
M M M M
QWC – to be awarded for the correct use of scientific
terms, to include at least 3 of the following:
Cis & trans, optical, plane, polarised, non-superimposable,
mirror images, geometric, bidentate,
ligand, octahedral, square planar, tetrahedral 1
And thanks for the 'en' formula thing!
(The mark scheme has it wrong too for some reason