Count all the contributing resonance structures of the carbonate ion $CO X_{3} X^{2 -}$ that obey the standard rules (same sigma framework, octet rule obeyed), counting equivalent structures separately. Give the number of such structures.

Numerical answer type, tolerance 0.5.

Answer: 3

The double bond to carbon can be placed on any one of the three oxygen atoms, and the other two oxygens carry a negative charge each. Counting structures: 3 positions, so 3 structures, and each is equivalent to the others.

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Count all the contributing resonance structures of the carbonate ion COX3​X2− that obey the standard rules (same sigma framework, octet rule obeyed), counting equivalent structures separately. Give the number of such structures.

Answer: 3

More questions on Resonance: rules, conditions and drawing resonating structures

Count all the contributing resonance structures of the carbonate ion $CO X_{3} X^{2 -}$ that obey the standard rules (same sigma framework, octet rule obeyed), counting equivalent structures separately. Give the number of such structures.