What represents the best method for converting a carboxylic acid to an aldehyde?

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(i) This method will not work R C O O H → S O C l 2 / P C l 3 / P C l 5 R C O C l → H 2 O R C O O H Aldehyde will not form (ii) Carboxylic acid are not reduced by L i A l H 4 . (iii) This method is best R C O O H → S O C l 2 / P C l 3 / P C l 5 R C O C l → l i t h i u m a l u m i n i u m t r i t - b u t o x y h y d r i d e . R C H O a l d e h y d e (iv) This method will produce alcohol rather than aldehyde: R C O O H → S O C l 2 / P C l 3 / P C l 5 R C O C l → I R ′ M g B r R C O R ′ → L i A l H 4 3 ο a l c o h o l

Chemistry - Carboxylic acid and their Derivatives Question with Solution | TestHub

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