Question

which does not have pyramidal geometry SO3, NO3, NH3, C(C6H5)3?​

Answer 1

C(C6H5)3 does not have pyramidal geometry.

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Answer 2

Pyramidal geometry:

Explanation:

• Molecular geometry is the three-dimensional arrangement of the atoms that contain a molecule.
• It includes the geometrical shape of the molecule in addition to bond lengths, bond angles, torsional angles, and any other geometrical parameters that determine the position of each atom.
• The molecular geometry of SO3 is trigonal planar with regular charge distribution on the central atom. The molecular geometry of NO3 is a trigonal planner.
• Ammonia has 4 regions of electron density around the central nitrogen atom resulting molecular shape that is trigonal pyramidal.
• C(C6H5)3 is also called triphenylmethyl. Hence benzyl rings are attached to each other.  
• From the above observations, C(C6H5)3 does not have pyramidal geometry.

Correct option is 4.