# Match the following catalysts to the transition metal used.

$\begin{array} {ll} \text{Catalyst} & \text{Transition Metal/Compound}\\ \text{1. Adam's Catalyst} & a. \;TiCl_4 + (C_2H_5)_3Al\\ \text{2. Wilkinson's Catalyst} &b.\; H_2Pd, BaSO_4 \;\text{in the presence of quinoline}\\ \text{3. Lindlar's Catalyst} & c.\;RhCl(PPh_3)_3\; \text{where Ph is Phenol}\\ \text{4. Ziegler Natta Catalyst} & d.\;Pt/PtO\\ \end{array}$

Answer: $(1) \to d; \quad (2) \to c; \quad (3) \to b;\quad (4) \to a$
(1) Adam's Catalyst: also known as platinum dioxide, is usually represented as platinum(IV) oxide hydrate.
(2) Wilkinson's Catalyst: is the common name for chlorotris(triphenylphosphine)rhodium(I), a coordination compound with the formula $RhCl(PPh_3)_3$, (Ph = phenyl)
(3) Lindlar's Catalyst: is a heterogeneous catalyst that consists of palladium deposited on calcium carbonate or barium sulfate and treated with various forms of lead.
(4) Ziegler-Natta Catalyst: , is a catalyst used in the synthesis of polymers of 1-alkenes (α-olefins). Two broad classes of Ziegler–Natta catalysts are employed, distinguished by their solubility. Heterogeneous supported catalysts based on titanium compounds are used in polymerization reactions in combination with cocatalysts, organoaluminum compounds such as triethylaluminium, $Al(C_2H_5)_3$. This class of catalyst dominates the industry
edited Aug 7, 2014