Question

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5. Draw the Newman Projection for butane in the gauche position. 6. Out of the following compounds, rank in terms of increasing heat of combustion?

Answer 1

Butane a-CH2 - CH2 - CH3 front cambon Reau Cabon. Now, In gauen projection We know that O = 60 and E= 0 - 9 kcal/mol H CH₃ -CH₂ Coo H Н cauben, two hd mone No. 6) Now, for heat of combers tion we know, first check which has No. of il howing same then check stability thum: among No. ofc 8 8 → 8

(most), Now, alkene is more unstable than alkane of same No. of caubon. :.lts Heat of combustion Will be highen Now, form @ 6 and@ -> most luustabl -> and most it od combustion Because of angle strain in 3 member ring- Them a unstable > 3rd most combustion (6 heat جا heat Because of angle strain in a menben sing Stable → outh llast heat of o) Beacase جا verly less angle Streim Order o Heat combestion increasing of of ANE: -

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