Advertisements
Advertisements
प्रश्न
Can Gatterman-Koch reaction be considered similar to Friedel Craft’s acylation? Discuss.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Write the product in the following reaction
Write the product in the following reaction:
How will you bring about the following conversion?
Benzoyl chloride to benzaldehyde.
Write the structure of the product of the following reaction:
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)
Aldehydes are produced on reduction of the following by DIBAL-H:
The oxidation of toluene to benzoic acid can be done using which of the following reagents.
Name the electrophile produced in the reaction of benzene with benzoyl chloride in the presence of anhydrous \[\ce{AlCl3}\]. Name the reaction also.
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 |
Match the acids given in Column I with their correct IUPAC names given in Column II.
| Column I (Acids) |
Column II (IUPAC names) |
||
| (i) | Phthalic acid | (a) | Hexane-1,6-dioic acid |
| (ii) | Oxalic acid | (b) | Benzene-1,2-dicarboxylic acid |
| (iii) | Succinic acid | (c) | Pentane-1,5-dioic acid |
| (iv) | Adipic acid | (d) | Butane-1,4-dioic acid |
| (v) | Glutaric acid | (e) | Ethane-1,2-dioic acid |
An alkene ‘A’ (Mol. formula \[\ce{C5H10}\]) on ozonolysis gives a mixture of two compounds ‘B’ and ‘C’. Compound ‘B’ gives positive Fehling’s test and also forms iodoform on treatment with \[\ce{I2}\] and \[\ce{NaOH}\]. Compound ‘C’ does not give Fehling’s test but forms iodoform. Identify the compounds A, B and C. Write the reaction for ozonolysis and formation of iodoform from B and C.
In the chromyl chloride test, the final step results in the formation of a yellow precipitate of the following:
Benz aldehyde + NaOH →
Aldehydes are the first oxidation products of ______.
The reagent in friedel - craft reaction is:
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 ______.
