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CBSE Class 12-science Answered

how do we convert esters to aldehyd
Asked by yukthas706 | 11 Jun, 2020, 10:00: AM
answered-by-expert Expert Answer
Esters can be converted to aldehydes using diisobutylaluminum hydride (DIBAH) at -78 oC.
 
 
stack straight R minus CO minus OR apostrophe with Ester below space rightwards arrow from 2 right parenthesis space straight H subscript 3 straight O to the power of plus to 1 right parenthesis space DIBAL of space stack straight R minus CO minus straight H with Aldehyde below space plus space stack HO minus straight R apostrophe with Alcohol below
Answered by Ramandeep | 11 Jun, 2020, 12:50: PM

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CBSE 12-science - Chemistry
sir/madam,   1. in NCERT chemistry books in organic chemistry sometimes hydrolysis rxn takes places by acid and water(H2SO4 + H2O/ H3O+/H+ + H2)), base with water(NaOH + H2O/ KOH + H2O) and other times only with water(H2O) what is the difference between the three and when do we use them in rxns ? hydrolysis means breaking or cleavage of compounds using water.... am I right?  2. Is Aldol rxn and condensation only limited to 2 molecules of same aldehyde compound and 2 molecules of same ketone compound? then does it mean that it undergoes self condensation? And cross Aldol rxn and condensation is carried out by two different molecules of aldehydes and two different molecules of ketones. is cross Aldol rxn and condensation also carried out between one aldehyde and one ketone molecules? request u to plz answer all questions
Asked by kaziryan.05 | 30 Jun, 2021, 04:52: PM
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CBSE 12-science - Chemistry
sir/madam, is KMnO4-KOH the chemical formula for alkaline potassium permanganate? like in the NCERT if alkylbenzene is reacted with chromic acid (H2CrO4), will there be any intermediate product just like alkylbenzene when reacted with KMnO4-KOH gives potassium salt of carboxylic acid which then further oxidises to carboxylic acid? also is my formula correct for chromic acid and alkaline potassium permanganate? pls requested to respond to all my questions
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Asked by kaziryan.05 | 28 Jun, 2021, 02:34: PM
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CBSE 12-science - Chemistry
IUPAC name 
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CBSE 12-science - Chemistry
Conversions from a-g
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Asked by shreevarshni1910 | 16 Jun, 2020, 01:36: PM
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CBSE 12-science - Chemistry
how do we convert esters to aldehyd
Asked by yukthas706 | 11 Jun, 2020, 10:00: AM
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CBSE 12-science - Chemistry
how is the cabonyl group of aldehyde/ketone affected in the presence of electron donating group like metyl in cyanohydrin reaction?
Asked by prakriti12oct | 14 Feb, 2020, 12:09: PM
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CBSE 12-science - Chemistry
an organic compound a with molecular formula c6h6o react with zinc dust to give a hydrocarbon B which upon reaction with CH3Cl in the presence of anhydrous AlCl3 gives C.compound C on oxidation with alkaline KMnO4 gives compound D Compound A on further reaction with NH3 in the presence of  anhydrous ZnCl2 gives E identify compound A B C D E and also justify your answer
Asked by Www.keshariramesh32 | 23 Nov, 2019, 02:02: PM
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CBSE 12-science - Chemistry
Please solve this question 
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Asked by Mrinal | 03 Sep, 2019, 10:03: AM
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CBSE 12-science - Chemistry
Pl ans
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Asked by jain.pradeep | 30 Aug, 2019, 01:35: AM
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CBSE 12-science - Chemistry
Oxidation of ortho nitrotoluene with agent Cro2cl2
Asked by takupatel1234 | 30 Jun, 2019, 12:09: PM
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