Penta-1,3-diene is more stable than penta-1,4 -diene. Why?

In Penta-1,3-diene all the four carbon atoms having sp2 hybridised and in conjugation while in case of penta-1,4-diene one carbon between two double bonded carbon is sp3 hybridised hence de localisation not possible.

Related Questions:

Penta-1,3-diene is more stable than penta-1,4 -diene. Why?

Phenoxide ion is more stable than an alkaoxide. why?

Why does aqueous sodium bicarbonate solution dissolve carboxylic acids but not phenol though they are also acidic ?

Why enol form of Beta Dicarbonyl compound more stable than those of monocarbonyl compounds?

Why enol form of phenol is more stable than its keto isomers?

Reactivity order of Pyrrole, Furan and Thiophene towards Electrophilic substitution :

Phenyl group is known to extract negative inductive effect, but each phenyl ring in biphenyl is more reactive than benzene towards Electrophilic substation. Why?

Chloroform is more acidic than fluoroform why?

Fluorine is more electronegative than chlorine even then, p-flurobenzoic acid is weaker acid than p-chlorobenzoic acid explain ? 

Trifluoroethyl carbocation is less stable than trifluromethyl carbocation why ?

Why is the Tropylium carbocation less stable than the tricyclopropylmethyl carbocation?

Give an explanation for the fact that Guanidine NH=C(CH3)2 is a stronger base than most of amines?

The remarkable basicity of guanidine is attributed to the fact that the positive charge on the  guanidinium ion is delocalized equally over the three nitrogen atoms, as shown by these three equivalent resonating  structures:

Related Questions:

Penta-1,3-diene is more stable than penta-1,4 -diene. Why?

Phenoxide ion is more stable than an alkaoxide. why?

Why does aqueous sodium bicarbonate solution dissolve carboxylic acids but not phenol though they are also acidic ?

Why enol form of Beta Dicarbonyl compound more stable than those of monocarbonyl compounds?

Why enol form of phenol is more stable than its keto isomers?

Reactivity order of Pyrrole, Furan and Thiophene towards Electrophilic substitution :

Phenyl group is known to extract negative inductive effect, but each phenyl ring in biphenyl is more reactive than benzene towards Electrophilic substation. Why?

Chloroform is more acidic than fluoroform why?

Fluorine is more electronegative than chlorine even then, p-flurobenzoic acid is weaker acid than p-chlorobenzoic acid explain ? 

Trifluoroethyl carbocation is less stable than trifluromethyl carbocation why ?

Why is the Tropylium carbocation less stable than the tricyclopropylmethyl carbocation?

Phenoxide ion is more stable than an alkaoxide. why?

Phenoxide ion is more stable than alkaoxide because phenoxide ion stabilised by resonance  whereas alkaoxide ion does not resonance stabilised .

Alkynes are more reactive than alkynes towards addition reaction but the opposite is true in case of catalytic hydrogenation. Why?

The alkynes are less reactive than alkynes towards halogens toon. Why?