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Order of rate of reaction of following compound with phenyl magnesium bromide is: ph-c ph me-c-h me c-me o o o (1) (ii) (iii) ov (b) ii> i>i (a) i> i1>ii (c) ii
Order of rate of reaction of following compound with phenyl magnesium bromide is: Ph-C Ph Me-C-H Me C-Me O O O (1) (II) (III) ov (b) II> I>I (a) I> I1>II (c) III >1 >II (d) II>1>III H TLL
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Narayanarao gundoju
more ph more resonance and less electrophilic nature of carbonyl
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Dinesh khalmaniya 1
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Explanation- we know that carbonyl compounds give nucleophilic addition reaction because C=O bond is polara so C gets partial positive and O gets partial negative charge.
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due to partial positive charge on Carbonyl Carbon it gives nucleophilic addition reaction that means nucleophile attack on carbonyl carbon
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so more the partial positive charge on carbonyl Carbon, more is the reactivity towards NAR
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we know that EWG decrease the electron density hence increase the partial positive charge on carbonyl carbon. while ERG decrease the partial positive charge on carbonyl carbon
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here Ph and CH3 both are ERG and Ph have +R while CH3 hav -I effect
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we know that +R is more dominant over +I effect so carbonyl having Ph groups have less reactivity than carbonyl having CH3 groups
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so the option B is correct
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Narayanarao gundoju
the effect order is A>R>H>I