Planner Triangle Molecule

by • 22/08/2013 • GeneralComments (0)344

Planner Triangle Molecule:

BF3 (Boron triflouride), SO3, CZHA are the examples of planner triangle molecule.

 

Structure of BF3

BF3 is a triangle shape molecule with bond angle 120º. There are three active electron pairs amount the Boron action.

i. BF3 is a trigonal shape molecule with bond angle 120°. There are three active electron pairs around the Boron atom.

ii. In terms of electron pair repulsion theory, three pairs of electrons are so adjusted by placing each F atom at the corners of equivalent triangle at 120° bond angle

 

iii. In terms of hybrid orbital theory, B atom undergoes Sp2 hybridization producing three Sp2 hybrid orbitals.

B (ground) —> 1s2, 2s2, 2p1x

B (excited) —> 1s2, 2s2, 2p1x, 2p1y

These three hybrid orbitals overlap with Px orbital of F atom producing sigma bond giving BF3.

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