CW29-OpI - 2 Suggestions for determining how many...

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CHM 2046/Myers Worksheet 29 March 29, 2010 1. Optical Isomers. This is where the mirror image of a structure in not superimpoable . - Tetrahedral complexes have optical isomers if all 4 ligands are different , as MABCD. - Octrahedral complexes sometimes will have optical isomers. An example is M(en) 3 . - If a structure has a plane of symmetry , the mirror image will be superimposable and there will be no optical isomer. Do any of these have an optical isomer?
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Unformatted text preview: 2. Suggestions for determining how many isomers (Geometric and Optical) exist. • Keep one ligand fixed in one position. (Helps avoid rotated duplicates.) • Work out the geometric (cis/trans) isomers first, naming them (cis-this, trans-that). • Check each geometric isomer for optical isomers (look for a plane of symmetry). Sample Problem : How many isomers are there for [CoBrCl(NH 3 ) 2 en] + ? __________...
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