Reaction of cyclopropane
Download as PPTX, PDF2 likes7,764 views
This document summarizes various reactions of cycloalkanes. Smaller cycloalkane rings (3-4 members) can be opened by hydrogen iodide or catalytic reduction. Larger rings can be opened through oxidation of cyclic alcohols, ketones, or cycloolefins formed by oxidizing the cycloalkane. Certain derivatives of cycloalkanes can undergo rearrangement through reactions, changing the ring size. Cycloolefins react with lead tetraacetate through acetoxylation of the double bond, usually forming cis and trans products. Cyclohexane similarly forms cis and trans cyclohexane diol. Cycloalkanes undergo free radical substitution and reaction with HBr, HI, nickel
1 of 16
Download to read offline
More Related Content
What's hot (20)
Ad
Similar to Reaction of cyclopropane (20)
Ad
More from gopinathannsriramachandraeduin (20)
Reaction of cyclopropane
- 2. Properties In many chemical aspects it resemble the alkane. With certain very important and intresting exceptions, alicyclic hydrocarbon undergo the same reaction as their open chain analogues
- 3. Opening of Ring • 3 or 4 membered rings may readily be opened by means of hydrogen iodide or by catalytic reduction. • The rings of higher members may be opened by oxidation of cyclic alcohol or ketone,or cycloolefin and in some cases by the oxidation of cycloalkane itself.
- 4. Changing the size of rings On treatment with particular reagents, certain derivatives of the cycloparaffins undergo rearrangement, the ring becoming either smaller or larger
- 5. Acetoxylation of the double bond in cycloolefins. Lead tetra acetate attacks double bonds in cyclo- olefins to form 1: 2 diacetate the addition products usually being a mixture of the cis and trans compounds Cyclohexane forms a mixture of cis and trans cyclohexane diol
- 6. Cycloalkane free radical substitution Reaction
- 7. Free radical substitution mechanism
- 10. Reaction of Cyclo hexene
- 11. Reaction of cyclo propane
- 14. Reaction of cycloalkane with HBr and HI • HBr attacks cyclopropane and form n-propyl bromide but no effect on other cycloalkane. • HI attacks both cyclopropane and cyclobutane and yield n-propyl iodide and n-butyl iodide respectively whereas it wont attack higher cycloalkane.
- 15. Reaction of cycloalkane with Nickel • When heated with hydrogen in the presence of nickel • At 80C cyclopropane converted to n-propane. • Cyclobutane yield n-butane at 120C. • Cyclopentane yield n-pentane at 300C. • Higher alkanes are not attacked by hydrogen in the presence of nickel
- 16. Oxidation : Cycloalkane undergo oxidation with not alkaline potassium permanganate to form dicarboxylic acid