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Cool goIITian

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9 Sep 2008 17:09:39 IST

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Lindlar's catalyst

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Lindlar's catalyst

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Blazing goIITian

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9 Sep 2008 17:22:57 IST

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This catalyst is used for the hydrogenation of alkynes to alkenes.

Shivam Srivastava... Got A Sunshine, now its my turn to get ultimate Pride ... :)

Blazing goIITian

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9 Sep 2008 17:24:34 IST

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A Lindlar catalyst is a heterogeneous catalyst that consists of palladium deposited on calcium carbonate and treated with various forms of lead. The lead additive serves to deactivate the palladium sites. A variety of "catalyst poisons" have been used including lead acetate and lead oxide. The palladium content of the catalyst is usually 5% by weight. The catalyst is used for the hydrogenation of alkynes to alkenes.

debotosh

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11 Sep 2008 12:20:33 IST

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Addition of hydrogen to an alkyne converts it to an alkane.however usage of a lindlar catalyst during hydrogenation of an alkyne converts it to an alkene and to an alkane.The catalyst is prepared with finely divided palladium or platinum deactivated with poisons like barium sulphate or calcium carbonate or quinoline.

AAKASH SHERAWAT

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13 Sep 2008 21:05:08 IST

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lindlar's catalyst is cis addition of hydrogen in presence of PdBaSO4 of PdCaCO3 on unsaturated compunds!

ninad

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14 Sep 2008 10:02:05 IST

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lindlars catalyst is Pd/BaSO4 H2

LAH LiAlH4 is used for all rdxn except c=c

Therefore can be used for rdxn of alkynes to alkenes

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