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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Can Gatterman-Koch reaction be considered similar to Friedel Craft’s acylation? Discuss. - Chemistry

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प्रश्न

Can Gatterman-Koch reaction be considered similar to Friedel Craft’s acylation? Discuss.

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उत्तर

Gattermann-Koch reaction is formylation (introduction of-CHO group) to the benzene nucleus. Friedel-Crafts acylation reaction is introduction of RCO-group in the benzene ring.

In Friedel-Crafts acylation reactions, the benzene is treated with an acid chloride in presence of anhydrous \[\ce{AlCl3}\]. So, Gattermann-Koch reaction can be considered similar to Friedel-Crafts acylation reaction.

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पाठ 12: Aldehydes, Ketones and Carboxylic Acids - Multiple Choice Questions (Type - I) [पृष्ठ १७३]

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एनसीईआरटी एक्झांप्लर Chemistry [English] Class 12
पाठ 12 Aldehydes, Ketones and Carboxylic Acids
Multiple Choice Questions (Type - I) | Q 37 | पृष्ठ १७३

संबंधित प्रश्‍न

Write the product in the following reaction:


Write the structure of the product of the following reaction:


How will you prepare the given compound from benzene? You may use any inorganic reagent and any organic reagent having not more than one carbon atom.

p-Nitrobenzaldehyde


Write the reaction involved in the Stephen reduction


When 0.4 g of acetic acid is dissolved in 40 g of benzene, the freezing point of the solution is lowered by 0.45 K. Calculate the degree of association of acetic acid. Acetic acid forms dimer when dissolved in benzene.
(Kf for benzene = 5.12 K kg mol−1, at. wt. C = 12, H = 1, O = 16)


Ozonolysis of alkenes followed by the reaction with zinc dust and water gives ____________ depending on the substitution pattern of the alkene.


Aldehydes are produced on reduction of the following by DIBAL-H:


Ethylbenzene is generally prepared by acetylation of benzene followed by reduction and not by direct alkylation. Think of a possible reason.


Match the common names given in Column I with the IUPAC names given in Column II.

  Column I
(Common names)
  Column II
(IUPAC names)
(i) Cinnamaldehyde (a) Pentanal
(ii) Acetophenone (b) Prop-2-enal
(iii) Valeraldehyde (c) 4-Methylpent-3-en-2-one
(iv) Acrolein (d) 3-Phenylprop-2-enal
(v) Mesityl oxide (e) 1-Phenylethanone

An aromatic compound ‘A’ (Molecular formula \[\ce{C8H8O}\]) gives positive 2, 4-DNP test. It gives a yellow precipitate of compound ‘B’ on treatment with iodine and sodium hydroxide solution. Compound ‘A’ does not give Tollen’s or Fehling’s test. On drastic oxidation with potassium permanganate it forms a carboxylic acid ‘C’ (Molecular formula \[\ce{C7H6O2}\]), which is also formed along with the yellow compound in the above reaction. Identify A, B and C and write all the reactions involved.


When 2 – hydroxyl benzoic acid distilled with zinc dust, it give


The general formula CnH2NO2 could be for open chain


The oxidation of toluene to benzaldehyde by chromyl chloride is called ______.


Convert the following:

Benzoic acid to Benzaldehyde.


Predict the reagent for carrying out the following transformations:

Benzoyl chloride to Benzaldehyde


The reaction of benzene with CO and HCl in the presence of anhydrous AlCl3 gives ______.


Account for the following:

Reduction of nitrobenzene using Fe and HCl is preferred over Sn and HCl.


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