Hydrogenation is the reaction in i beg your pardon hydrogen is included to the unsaturated molecules. This reaction is carry out through addition of molecular hydrogen in the presence of steel catalyst come unsaturated molecules.

You are watching: Draw the three alkenes, each of formula c5h10, that will form 2-methylbutane upon hydrogenation.


Hydrogenation is a procedure which explains the reaction in between unsaturated molecules and molecular hydrogen. H2 with any unsaturated link in the existence of a catalyst such as nickel, palladium or platinum to provide the equivalent saturated compound.

Finding the unsaturated reactant using the given saturated product can arrive infour steps:

1.Apply DBE formulae for offered molecular formula come find level of unsaturation.

2.Drawing isomers

3.the derived unsaturated isomers to be hydrogenated

4.isolation the unsaturated isomers i m sorry are leading to 2-methylbutane

By utilizing DBE (Double link equivalence) formulae, the number of unsaturation deserve to be uncovered for a molecule.

The formula to calculation DBE is given below:

DBE=C−H2−X2+N2+1\rmDBE = C - \frac\rmH\rm2\rm - \frac\rmX\rm2\rm + \frac\rmN\rm2\rm + 1DBE=C−2H​−2X​+2N​+1

Where the number of hydrogen atom is H

The variety of halogenatoms is X

The variety of nitrogenatoms is N

The number of carbonatoms is C

Isomers space compounds which have same chemistry formulae however differ in your order of arrangements. Using double bond equivalence, various isomers the the offered chemical formulae the unsaturated reactants deserve to be drawn.

Hydrogenation is offered for reduction of alkenes and other greater unsaturated compounds to provide their matching alkanes. Processing hydrogenation reaction come the isomers gives their corresponding products. The isomer which provides 2-methyl butane is the target the interest.

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The given chemical formula is C5H10\rmC_\rm5\rmH_\rm10C5​H10​ .

Numberofcarbons,C=5Numberofhydrogens,H=10Numberofhalogens,X=0Numberofnitrogens,N=0\beginarrayl\\\rmNumber the carbons,\;\;\;\;\,\,\,\,\,\rmC\,\,\rm = \,\,\rm5\\\\\rmNumber the hydrogens,\;\;H \,\rm = 10\\\\\rmNumber of halogens,\;\;\;\,\,\rmX\,\,\,\rm = \,\,\rm0\\\\\rmNumber that nitrogens, \,\,\rmN = 0\\\endarrayNumberofcarbons,C=5Numberofhydrogens,H=10Numberofhalogens,X=0Numberofnitrogens,N=0​

The twin bond equivalence is:

DBU=C−H2−X2+N2+1=5−102−02+02+1=1\beginarrayl\\\rmDBU = C - \frac\rmH\rm2\rm - \frac\rmX\rm2\rm + \frac\rmN\rm2\rm + 1\\\\\rm = 5 - \frac\rm10\rm2\rm - \frac\rm0\rm2\rm + \frac\rm0\rm2\rm + 1\\\\\rm = 1\\\endarrayDBU=C−2H​−2X​+2N​+1=5−210​−20​+20​+1=1​

All the possible isomers of C5H10\rmC_\rm5\rmH_\rm10C5​H10​ through one dual bond are offered below.