The use of heterogeneous catalysts instead of homogeneous -Advs

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Leah.J
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The question was why industrial chemists prefer heterogeneous catalysts to homogeneous catalysts.
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What is meant by stereospecific here ?
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Turtlebunny
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Stereospecificity is the way in which a reaction mechanism proceeds to give specific isomers/specific stereochemistry for your products. E.g. a heterogeneous catalyst, which could be a surface metal for example may prefer one mechanism over another giving rise to the Z isomer of an alkene rather than a E isomer. Homogenous catalysts don't really do this - for a homogenous catalyst, think acid catalyst or protons that allow a reaction to proceed (e.g make a carbonyl more electrophilic). They have catalytic action but don't influence the stereochemistry of the product (unlike heterogeneous catalysts which can do).
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