why diborane is called 3 centred 2 electron bond
Answers
Diborane :
Diborane is a chemical compound consisting of boron and hydrogen. The formula of diborane is B₂H₆.
Properties :
- Colorless
- pyrophoric gas
- sweet odor.
★No of valence orbitals of diborane = 10(four from each boron atom and one from each hydrogen)
★No of valence electrons = 12
★In this molecule, each of the two boron atoms will be bonded to two hydrogen atoms via covalent bonds. These bonds will use up 8 of the 12 valence electrons.
★To engross all of their valence orbitals in bonding, the atoms in electron- deficient compounds sometimes form three-center two-electron (3c-2e) bonds.
★A three-center two-electron (3c–2e) bond is an electron-deficient chemical bond where three atoms share two electrons.
★The combination of three atomic orbitals form three molecular orbitals: one bonding, one non-bonding, and one anti-bonding.
★Also called as banana bond.
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