Which resonance structure is more stable?
1. The resonance structures in which all atoms have complete valence shells is more stable. This means most atoms have a full octet. In the example below structure A has a carbon atom with a positive charge and therefore an incomplete octet.
Which structure is more stable and why?
Structures in which all the atoms have a complete valence shell of electrons (i.e., the noble gas structure) are more stable.
Which compound is more stable?
Therefore, Ph3C+ is most stable due to presence of three benzene rings which are resonance stabilised.
Why is if unstable?
In IF there should be overlap between 2pelectron and 5p electron. Therefore the overlap between 2p electron and 5p electron will not be proper and bond will not be stable. ... For this reason IF is unstable.
Are all compounds stable?
Chemical substances or states can persist indefinitely even though they are not in their lowest energy state if they experience metastability - a state which is stable only if not disturbed too much.
Which alkene in each pair is more stable?
Trans alkenes are more stable than cis.
How do you know which alkene is more stable?
Alkenes have substituents, hydrogen atoms attached to the carbons in the double bonds. The more substituents the alkenes have, the more stable they are. Thus, a tetra substituted alkene is more stable than a tri-substituted alkene, which is more stable than a di-substituted alkene or an unsubstituted one.
Is E or Z more stable?
Cis or Z isomers are less stable and higher in energy molecules because they create a destabilizing effect in which the two larger groups bump into one another, leading to electric repulsion. ... Therefore, generally speaking, the trans (E) isomers are more stable and lower in energy than the cis (Z) isomers.
Which is more stable alkane or alkene?
Generally speaking, alkenes are less stable than alkanes. In alkanes, there are only σ bonds (i. e. C-C single bonds and C-H bonds). ... The bond energy of an average C-C π bond is around 264 kJ/mol, which is remarkably lower than that of a C-C σ bond, and it is easier for alkenes to undergo addition or oxidation.
Which is more stable alkane?
Longer chain alkanes are typically more stable (relatively, based on the number of carbons) compared with a shorter chain alkane. More branched compounds are typically more stable than straight chain alkanes with the same number of atoms. For example, 2-methylpropane is more stable than butane.
Why alkane is more stable than alkene?
Alkanes have a single bond, less energy than alkenes and alkynes which have respectively two and three bonds and higher energy. Higher energy means shorter bonds which means stronger bonds. But in this case, the stronger bonds in alkenes/alkynes have higher bond energy and thus more unstable than alkanes.
Which hydrocarbon is more stable?
Does branching increase stability?
Branched alkane hydrocarbons are thermodynamically more stable than straight-chain linear alkanes. ... Electrostatic effects, combined with correlation energy, explains why branched alkanes are more stable than linear alkanes.
Does higher heat of combustion mean more stable?
The higher the heat of combustion, the higher the energy level of the molecule, the less stable the molecule."
Are alkynes more stable than alkanes?
Alkanes have a single bond, less energy than alkenes and alkynes which have respectively two and three bonds and higher energy. Higher energy means shorter bonds which means stronger bonds. Alkynes are less stable then alkenes and alkanes despite the bond being stronger.
Which alkyne is most stable?
Which is more reactive alkanes or benzene?
What is more reactive, alkane, alkene, alkyne or benzene? ALKENE IS MORE REACTIVE BECAUSE IT GIVES ADDITION REACTIONS SUCH AS DECLOURIZING OF BROMINE WATER IN CASE OF ALKENE. ... BENZENE DO NOT GIVE POLYMERIZATION REACTION AND NOT FORMED LARGE MOLECULES WHILE ALKENE GIVES ALSO POLYMERIZATION REACTION.
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