The boron trifluoride molecule is depicted as having
three single bonds and an electron-deficient central boron...
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Chemistry
The boron trifluoride molecule is depicted as havingthree single bonds and an electron-deficient central boron atom.Use the concept of formal charge to suggest why a structureinvolving a double bond to one fluorine, which would provide anoctet to the boron, is not favored.
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If we add one double bond between boron and one of the fluorineswe get the following Lewis StructureThe fluorine that shares a doublebond with boron has six electrons around it four from its two lonepairs of electrons and one each from its two bonds with boronThis is one less electron than the number of valence electrons itwould have naturally Group seven elements have seven valenceelectrons
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