Respuesta :

Correct option:

The molecular structure of NCl3 is a. pyramidal

Molecular structure of NCl3:

The molecular geometry of NCl3 can also be ascertained using the AXN approach.

  • The center atom is shown as A.
  • The bound pairs of electrons to the main atom are shown by the letter X.
  • The core atom's lone pair of electrons is represented by the letter N.

The center atom in the NCl3 lewis dot structure is nitrogen, which possesses three pairs of bound electrons as well as one single electron.

Consequently, the NCl3 formula becomes AX3N1.

Therefore, if a molecule has the formula AX3N1, its shape is trigonal pyramidal, and its electron geometry is tetrahedral, according to the VSEPR chart and it undergoes [tex]sp^{3}[/tex] hybridization.

Reasons for incorrect options:

b. None of these: As pyramidal is one of the options given in the question. So, none of these is incorrect.

c. Octahedral: Electron geometry takes into account both bond pairs and lone pairs of electrons, whereas molecular geometry solely takes into account electrons' bonds when determining the structure of any molecule. As NCl3 has three bound pairs and one unpaired pair. Therefore, NCl3's electron geometry is tetrahedral while its molecular geometry is trigonal pyramidal, as seen by the VSEPR chart. Hence, octahedral is an incorrect option.

d. trigonal planar: If a molecule has three atoms or groups bound to a central atom and no lone electron pairs, it is said to be trigonal planar. But here in NCl3, it has three atoms and one lone electron pair. So, trigonal planar is not the correct option for NCl3.

e. bent: The lone pair on nitrogen generates repulsion between bond pairs and the lone pair, which causes the bond angle of NCl3 to slightly decreasing, making it 107.1°. Because of the lone pair on the nitrogen, which causes electrons to repel one another and bent the structure overall, NCl3 has a slight polarity. This permanent dipole moment is caused by the unequal charge distribution within the structure. But trigonal pyramidal is best to describe the molecular structure of NCl3. Hence is an incorrect option.

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