Q. 6.73 - An Introduction to General, Organic, and Biological Chemistry

Question

Complete each of the following statements for a molecule of ${\mathrm{SeO}}_3$ :
a. There are              electron groups around the central $\mathrm{Se}$ atom.
b. The electron-group geometry is            .
c. The number of atoms attached to the central $\mathrm{Se}$ atom is           
d. The shape of the molecule is           .

Step-by-Step Solution

Answer

Filling the blank we get:

a. There are $\underline{ 3 }$ electron groups around the central $\mathrm{Se}$ atom.
b. The electron-group geometry is      triagonal planar    .
c. The number of atoms attached to the central $\mathrm{Se}$ atom is $\underline{ 3 }$
d. The shape of the molecule is      triagonal planar with bond angle of $120°$     .

Part(a) Step 1: Given Information

We are given a molecule ${\mathrm{SeO}}_3$ for that we need to fill in the blank: There are              electron groups around the central $\mathrm{Se}$ atom.

Part (a) Step 2: Explanation

Above is structure of ${\mathrm{SeO}}_3$.

Central atom has three electron groups $\Rightarrow$three double bond to $\mathrm{O}$ atom.

There are     three    electrons groups around central $\mathrm{Se}$ atom.

Part(b) Step 1: Given Information

We are given a molecule ${\mathrm{SeO}}_3$ for that we need to fill in the blank: The electron-group geometry is            .

Part (b) Step 2: Explanation

Between $\mathrm{Se}$ and $\mathrm{O}$, three double covalent bonds are generated in ${\mathrm{SeO}}_3$. The connectivity between $\mathrm{Se}$ and $\mathrm{O}$ atoms has one sigma bond and one pi bond. On the core atom there are no lone pairs of electrons. This indicates that the molecule is symmetrical, with no repulsions or distortions. So it has $s{p}^2$ hybridization. The electron group has a triagonal planar geometry.

Part(c) Step 1: Given Information

We are given a molecule ${\mathrm{SeO}}_3$for that we need to fill in the blank: The number of atoms attached to the central $\mathrm{Se}$ atom is        

Part (c) Step 2: Explanation

 Above is structure of ${\mathrm{SeO}}_3$.From structure we can see that central atom is $\mathrm{Se}$ which is attached to three $\mathrm{O}$ atoms.

Three oxygen atoms are attached to central $\mathrm{Se}$ atom.

Hence, The number of atoms attached to the central $\mathrm{Se}$ atom is $\underline{ 3 }$.

Part(d) Step 1: Given Information

We are given a molecule ${\mathrm{SeO}}_3$ for that we need to fill in the blank: The shape of the molecule is           .

Part (d) Step 2: Explanation

The core $\mathrm{Se}$ atom has no lone pair of electrons. This indicates that the molecule is symmetrical, with no repulsions or distortions. So it has $s{p}^2$ hybridization. As a result, the molecule's form is triagonal planar with bond angle of $120°$.

The shape of the molecule is    triagonal planar with bond angle of $120°$       .