Question
Download Solution PDFThe number of 3C-2e bonds present in Al(BH4)3 is -
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
A 3-center 2-electron bond (3c-2e) is a type of bonding where three atoms share two electrons. This type of bond is often seen in compounds with electron-deficient bonding, such as in boron hydrides and their derivatives.
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3C-2e bonds provide stability to electron-deficient molecules.
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These bonds typically involve one atom donating an electron pair which is then shared among two other atoms.
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The 3C-2e bonds are less dense in electron distribution compared to conventional 2-center 2-electron bonds.
Explanation:
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In aluminum borohydride, Al(BH4)3, each BH4- anion forms tetrahedral geometry around the boron atom.
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The BH4 units can bond to the aluminum atom in a bridging manner, where hydrogen atoms act as bridges forming 3-center 2-electron bonds with boron and aluminum. Each BH4 unit can form two such 3c-2e bonds with aluminum.
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Conclusion:
The total number of 3c-2e bonds in Al(BH4)3 is: 6.
Last updated on May 30, 2025
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