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Wilkinson's catalyst \( \left[R h\left(P h_{3} P\right)_{3} C l\right] \) is used for:

1. hydrogenation of oils
2. hydrogenation of alkynes
3. hydrogenation of alkenes
4. polymerisation of alkenes

Correct answer: hydrogenation of alkenes

Solution

Wilkinson's catalyst, Rh(PPh3)3Cl, is a classic homogeneous hydrogenation catalyst. It is especially used to hydrogenate alkenes to alkanes by adding hydrogen across carbon–carbon double bonds.

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