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3 questions
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Does it sometimes take energy to create a chemical bond? [duplicate]
Wikipedia says so:
Bonds can also be broken apart. Since most bonds require energy to form, they also give off energy when they are broken. But before most bonds break, the molecule has to be ...
4
votes
1
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Can a bond be electrophilic or nucleophilic?
The indicated bond is:
A) Nucleophilic because it is electron-deficient.
B) Electrophilic because it is electron-rich.
C) Nucleophilic because it is electron-rich.
D) Electrophilic because it is ...
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3
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1
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Why does boron trifluoride form boron tetrafluoride ion instead of boron pentafluoride ion?
From ChemWiki by UC Davis:
As a side note, it is important to note that $\ce{BF3}$ frequently bonds with a $\ce{F-}$ ion in order to form $\ce{BF4-}$ rather than staying as $\ce{BF3}$. This ...
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