Shweta Thakur posted an Question
October 20, 2020 • 21:54 pm 30 points
  • IIT JAM
  • Chemistry (CY)

Why lialh4and nabh4 can't reduce c double bond c ....but h2 / ni can o--c ohsil Ídlp+ hedured wulo ( thu h3d

dUed H is Da exally O-OE Cu- H Cu-OioH-ČuH AHy NabHt CH-O--C OHsIL ÍdlP+ HEdured wulo ( thu H3D

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    Priyanshu kumar Best Answer

    LiAlH4 reduces a C-C double bond which is in conjugation i.e. resonance. Also LiAlH4 does not reduces aromatic double bond even though it is in conjugation.

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    Neither LiAlh4 nor nabh4 reduces isolated double bond

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    lialh4 and nabh4 are hydride based reagents so it doesn't easily reduce isolated double bond

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    LiAlH4 and NaBH4 can be thought of as providing hydride ions, H−. These cannot attack an electron rich carbon-carbon double bond, or be attacked by a pair of negative electrons from a pi orbital.

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