a
Wilkinson's catalyst is \([RhCl(PPh_3)_3]\), Red-violet in colour and has square planar structure. It is used for selective hydrogenation of organic molecules at room temperature and pressure.
\(TiCl_4 + (C_2H_5)_3Al\) is Zeigler Natta catalyst.
\((C_2H_5)_4Pb\) is an anti-knocking agent.
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