Question

In: Chemistry

In AX3, the central atom A forms three single covalent bonds and has two lone pairs....

  1. In AX3, the central atom A forms three single covalent bonds and has two lone pairs. What is the molecular geometry of the molecule? What will be molecular geometry if A has three lone pairs? Why? Predict whether the molecule is polar or nonpolar in both these cases.
  2. What type of hybridization will the central atom undergo when A has three lone pairs in the molecule described in (a) above? Can hybridization explain the paramagnetic behavior of molecules? Justify your answer.

Solutions

Expert Solution

a.

There are 3 possible isomers of AX3, with 2 lone pairs & 3 single bond, are shown. According to Vesper theory the 3rd arrangement is proper, as in that arrangement molecule feels least repulsion. & its polar in nature shown in the photo.

While in case A atom with 3 lone pair 3 single bond 2 isomer shown below,

The 1st one with T shape is more stabel, stable less repulsion

b. The hybrid orbitals = number of lone pairs + number of bond pairs. As in the 2nd case the central atom A with 3 lone pairs & 3 bond pairs.Then the hybrid orbitals - 6 then the hybridization is sp3d2.

Due Paramagnetic behaviour, molecule attract by an external magnetic field. Hybridization don't play a good role at predicting if a molecule is paramagnetic or diamagnetic. For a molecule to be a paramagnetic need to have overall magnetic momentum of the molecule. That's means at least 1 unpaired electron present in the molecule.

as you can see all electrons are paired in oxygen molecule that's why VBT( valence bond theory, explain the formation of bond by sharing unpired electron of two atom forming a orbital by overlaping of hybrid orbital) explain that oxygen is diamagnetic.


Related Solutions

How many lone pairs are on the central atom in BCl3?
A) How many lone pairs are on the central atom in BCl3? Express your answer numerically as an integer. B)How many lone pairs are on the central atom of BrF3? Express your answer numerically as an integer.
1. Give the number of lone pairs around the central atom and the molecular geometry of...
1. Give the number of lone pairs around the central atom and the molecular geometry of SeF4. Question 1 options: 0 lone pairs, tetrahedral 1 lone pair, distorted tetrahedron (seesaw) 1 lone pair, square pyramidal 1 lone pair, tetrahedral 2 lone pairs, square planar Save Question 2 Give the number of lone pairs around the central atom and the geometry of the ion SeO42–. Question 2 options: 0 lone pairs, square planar 1 lone pair, square pyramidal 1 lone pair,...
Find point number of electron groups around central atom? Polarity? Number of Lone pairs for central...
Find point number of electron groups around central atom? Polarity? Number of Lone pairs for central atom? Lewis dot structure? Approximate bond angles? Electron pair arrangement around central atom/shape of the molecule? Hybridization of central atom? Symmetry elements and Points groups of compounds below. a) NF3 b) XeO3 c) SCl2
How many lone pairs of electrons will be on the central atom in the correct Lewis structure for PBr3?
How many lone pairs of electrons will be on the central atom in the correct Lewis structure for PBr3?
Explain why only the lone pairs on the central atom are taken into consideration when predicting...
Explain why only the lone pairs on the central atom are taken into consideration when predicting molecular shape. Is it because lone pairs have greater repulsion than bonded electrons? if so, why do electrons on outter atoms not determin the shape of the molecule?
In a common allotrope of elemental crystalline arsenic, each arsenic atom forms covalent bonds to three...
In a common allotrope of elemental crystalline arsenic, each arsenic atom forms covalent bonds to three other atoms in a puckered sheet such that the molecular geometry around each atom of arsenic is trigonal pyramidal. Which of the following is most likely the reason for this? Select the correct answer below: (A) Each arsenic atom is sp2-hybridized. (B) Arsenic has an unoccupied d-orbital. (C) There is a single lone pair of electrons in arsenic's valence shell. (D) There are two...
How many of the following have lone pairs on the central atom? NCl 3 SO 2...
How many of the following have lone pairs on the central atom? NCl 3 SO 2 CO 2 CH 4 0 1 2 3 4 A 0.529 g sample of gas occupies 125 mL at 600 mmHg and 25°C. What is the molar mass of the gas? 110 g/mol 11 g/mol 81 g/mol 130 g/mol What period 3 element is described by the following ionization energies (all in kJ/mol)? IE1 = 1012  IE2 = 1900  IE3= 18010   Mg Cl P S Si...
1. PF5 has five single bonds to the central atom. SF4 has four single bonds to...
1. PF5 has five single bonds to the central atom. SF4 has four single bonds to the central atom and the central atom possesses a lone pair of electrons. How can this observation be used to explain the different bond angles you measured.
Are the number of lone pairs of electrons on the central atoms the main factor that's...
Are the number of lone pairs of electrons on the central atoms the main factor that's used to determine the molecular shape or geometry?
8-The _________ form the surface of an atom and participate in forming covalent bonds. a. neutrons...
8-The _________ form the surface of an atom and participate in forming covalent bonds. a. neutrons and electrons b. protons c. neutrons d. protons and neutrons e. electrons 10-Failure of cell cycle check points can cause ________. a. Increased chance of cancer b. Increased mutation rates c. Benign tumors d. All of these e. Unregulated cell division 11-Which is the lowest level of biological organization that shows the emergent property we consider “life”? a. Population b. Cell c. Community d....
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT