91- 6303239042
Rapid Recognition Identifiers:
$$\begin{aligned} \text{Linkage Isomerism:} &\quad \text{Requires ambidentate ligands present } (\text{e.g., SCN}^-/\text{NCS}^-, \text{ NO}_2^-/\text{ONO}^-, \text{ CN}^-/\text{NC}^-) \\ \text{Ionization Isomerism:} &\quad \text{Interchange of ligands inside the sphere with counter-ions outside } (\text{yields different precipitates}) \\ \text{Solvate Isomerism:} &\quad \text{Interchange of solvent molecules } (\text{H}_2\text{O}) \text{ inside the coordination sphere with crystallization sites} \\ \text{Coordination Isomerism:} &\quad \text{Interchange of ligands between distinct cationic and anionic complex entities in a salt} \end{aligned}$$
Concept: Categorizes structural variations where isomers differ by their atom-to-atom bonding connectivity patterns or coordination sphere boundaries rather than spatial orientations.
Notation: Identification relies on looking for ambidentate donor centers or monitoring counter-ion swap reactions with qualitative reagents like $$\text{BaCl}_2$$ or $$\text{AgNO}_3$$.
Complex Formula Type | Geometrical Isomers | Optical Isomers (Enantiomeric Pairs) | Total Stereoisomers |
$$[Ma_4b_2]$$ | $$2 \quad (\text{cis, trans})$$ | $$0$$ | $$2$$ |
$$[Ma_3b_3]$$ | $$2 \quad (\text{fac, mer})$$ | $$0$$ | $$2$$ |
$$[M(AA)_2b_2]$$ | $$2 \quad (\text{cis, trans})$$ | $$1 \text{ pair } (\text{cis only})$$ | $$3 \quad (1 \text{ trans } + 2 \text{ cis enantiomers})$$ |
$$[M(AA)_3]$$ | $$0$$ | $$1 \text{ pair}$$ | $$2 \quad (\text{d and l forms})$$ |
