Answer: MA2B2 type (e.g., [Pt(NH3)2Cl2]).
- A MA2B2 type (e.g., [Pt(NH3)2Cl2])
- B MA4 type complexes, which show no geometric isomerism in square planar geometry
- C MA6 type complexes, which are not square planar at all
- D MA2 type complexes, which have too few ligands to show cis-trans isomerism
Correct answer: A. MA2B2 type (e.g., [Pt(NH3)2Cl2])
Explanation: Square planar MA2B2 complexes can have A and B groups either adjacent (cis) or diagonal (trans), giving two isomers.
The three common coordination geometries: octahedral (6 ligands), tetrahedral (4 ligands), and square planar (4 ligands in one plane).
Concept context
Study of compounds where a central metal atom is bonded to surrounding ligands. Covers nomenclature, types of isomerism, bonding theories (VBT, CFT), and applications in medicine, photography, and industry.