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what is the main difference between the reducing agent LiAlH4 and Ni/Hydrogen? when we have to use NI/H2and when we can use other?

what is the main difference between the reducing agent LiAlH4 and Ni/Hydrogen? when we have to use NI/H2and when we can use other?

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3 Answers

SAGAR SINGH - IIT DELHI
879 Points
11 years ago

Dear student,

LiAlH4 and NaBH4 both reduce carboxylic acids / ketones, but only LiAlH4 reduces a nitro group

H2/Nickel reduces C=C

Sanjeev Malik IIT BHU
101 Points
11 years ago

LiAlH4 gives 4 H- in 1 mole. lialh4is specific and selective in nature and generally used in reduction of oxygenated compounds to corres. alcohols. further it cannot reduce.

ni/h2 works as a bulk to generally give alkanes from alkenes. it can reduce alkenes bt lialh4 cannot( bt conjugate are doneable).

it does not reduce easily compounds like cooh, ketone,ester etc.

Akshay
13 Points
2 years ago
H2/ ni reduction is used to reduce ring substituent only here lilh4 not work good as it will reduce benzene double bond also

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