allkynes Flashcards
what are alkynes
the aliphatic hydrocarbons
containing a triple bond between 2 carbon atoms
what is the general formula for an alkyne
Cn H2n-2
where n = number of carbon atoms
what is the common and IUPAC name for C2H2
common name = acetylene
IUPAC name = ethyne
what is the common and IUPAC name for C3H4
common name = methyl acetylene
IUPAC name = propyne
name 3 physical properties of C2H2 (ethyne )
- -> it is a colorless gas
- ->etheral smell when it is pure
- -> vapor density is 13
why is ethyne highly reactive in nature
this is due to the presence of a triple bond between 2 carbon atoms
what are 3 uses of ethyne
- -> used in artificial ripening of fruits
- -> it is used as an illuminant in oxyacytylene lamp
- -> used for producing oxyacetylene flame for welding and cutting purposes
define polymerization
it is the combination of simple units to give complex molecules
3C2H2 —> C6H6 (passed through hot copper (cu-tube))
600 degree celcius
name a hydrocarbon with triple bond used for welding purposes ???
ethyne / acetylene
catalyst used in conversion of ethyne to ethane
nickel (Raney)
what type of reactions do alkynes undergo
addition reactions
which will give red precipitate with ammonical cuprous chloride solution
ethyne
which hydrocarbon has linear molecule
ethyne
gas used in illuminating country houses
ethyne / acetylene
what conditions are required for catalytic hydrogenation of ethyne
–>in the presence of catalyst like finely divided nickel platinum,
–> heating upto 473K
