Total number of geometrical and optical isomers shown by [Pt(en)Br2Cl2] is:
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Solution
[Pt(en)Br2Cl2] is an octahedral complex of [M(AA)a2b2] type and has cis and trans, i.e. two geometrical isomers possible. Cis-isomer is optically active and gives two optically active isomers (d and l). Thus, there are three isomers.