Textbook Question
What is the best prediction for the carbon–oxygen bond length in the carbonate anion, CO3 2-? (LO 7.14)
Data for average carbon-oxygen bond lengths:
(a) 143 pm
(b) 132 pm
(c) 121 pm
(d) 118 pm
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Use formal charge to select which resonance structure makes the largest contribution to the resonance hybrid. (LO 7.16) (a) Structure I (b) Structure II (c) Structure III (d) All structures are equivalent and make the same contri-bution to the resonance hybrid. (I)
(II)
(III)
Two electrostatic potential maps are shown, one of methyl-lithium (CH3Li) and the other of chloromethane (CH3Cl). Based on their polarity patterns, which do you think is which? (a)
(b)