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(A) The stability of resonance structures is determined by the following rules:$1$. Structures with more covalent bonds are more stable.$2$. Structure

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$I > II > III$

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(A) The stability of resonance structures is determined by the following rules:$1$. Structures with more covalent bonds are more stable.$2$. Structures with complete octets for all atoms are more stable.$3$. Structures with negative charge on more electronegative atoms and positive charge on less electronegative atoms are more stable.Structure $I$ $(CH_2=CH-CH=O)$ has all atoms with complete octets and no formal charges,making it the most stable.Structure $II$ $(^+CH_2-CH=CH-O^-)$ has a positive charge on carbon and a negative charge on oxygen,which is relatively stable due to electronegativity,but it has fewer covalent bonds than $I$.Structure $III$ $(-CH_2-CH=CH-O^+)$ has a negative charge on carbon and a positive charge on oxygen,which is highly unstable due to the positive charge on the highly electronegative oxygen atom.Therefore,the decreasing order of stability is $I > II > III$.

Arrange the following in the decreasing order of stability:
$I. CH_2=CH-CHO$
$II. ^+CH_2-CH=CH-O^-$
$III. ^-CH_2-CH=CH-O^+$

Similar Questions

The correct order of stability for the given canonical structures is:
$(I)$ $H-C(=O)-CH_2^-$
$(II)$ $H-C(O^-)(^+)-CH_2^-$
$(III)$ $H-C(O^-)=CH_2$

Which of the following is the most unstable resonance structure of the $p$-nitrophenoxide ion?

The correct order of decreasing length of the bond as indicated by the arrow in the following structures is:

Draw other resonance structures related to the following structure and find out whether the functional group present in the molecule is ortho,para directing or meta directing.

Which of the following is the least stable?

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Arrange the following in the decreasing order of stability: $I. CH_2=CH-CHO$ $II. ^+CH_2-CH=CH-O^-$ $III. ^-CH_2-CH=CH-O^+$