Q. Which one of the following pairs is iso-structural ?
Chemical Bonding and Molecular Structure
Solution:
If number of $B.P.$ and $L.P $ are same for the given pairs, they are isostructural.
a.
$3 \sigma$ bond
a.
$3 \sigma$ bonds + 2 lone pairs
b.
$sp^{2}$-hybridatoin
b.
$sp^{3}d$ hybridisation
c.
Electronic geometryTrigonal planar
c.
Electronic geometry: Distorted trigonal bipyramidal
d.
Molecular geometry/shape: Trigonal planar
d.
Molecular geometry/ shape: Bent T-shape
(b) $NH_{3}$ and $NO^{-}_{3}$
a.
$3 \sigma$ bond + 1 lone pair
a.
$3 \sigma$ bonds + 0 lone pairspairs
b.
$sp^{3}$-hybridatoin
b.
$sp^{2}$ hybridisation
c.
Electronic geometry-distorted tetrahedral
c.
Electronic geometry- Trigonal planar
d.
Molecular geometry/shape-pyramidal
d.
Molecular geometry shape - trigonal planar
(c) $NF_{3}$ and $BF_{3}$
a.
$3 \sigma$ bond + 1 lone pair on central atom
a.
$3 \sigma$ bonds + 0 lone pairs on central atom
b.
$sp^{3}$-hybridatoin
b.
$sp^{2}$ hybridisation
c.
Electronic geometry-distorted tetrahedral
c.
Electronic geometry- Trigonal planar
d.
Molecular geometry/shape-pyramidal
d.
Molecular geometry shape - trigonal planar
(d) $BF^{-}_{4}$ and $NH^{+}_{4}$
a.
$4 \sigma$ bond
a.
$4 \sigma$ bonds
b.
$sp^{3}$-hybridatoin
b.
$sp^{3}$ hybridisation
c.
Electronic geometry-tetrahedral
c.
Electronic geometry- tetrahedral
d.
Molecular geometry/shape-tetrahedral
d.
Molecular geometry: tetrahedral
| a. | $3 \sigma$ bond | a. | $3 \sigma$ bonds + 2 lone pairs |
| b. | $sp^{2}$-hybridatoin | b. | $sp^{3}d$ hybridisation |
| c. | Electronic geometryTrigonal planar | c. | Electronic geometry: Distorted trigonal bipyramidal |
| d. | Molecular geometry/shape: Trigonal planar | d. | Molecular geometry/ shape: Bent T-shape |
| a. | $3 \sigma$ bond + 1 lone pair | a. | $3 \sigma$ bonds + 0 lone pairspairs |
| b. | $sp^{3}$-hybridatoin | b. | $sp^{2}$ hybridisation |
| c. | Electronic geometry-distorted tetrahedral | c. | Electronic geometry- Trigonal planar |
| d. | Molecular geometry/shape-pyramidal | d. | Molecular geometry shape - trigonal planar |
| a. | $3 \sigma$ bond + 1 lone pair on central atom | a. | $3 \sigma$ bonds + 0 lone pairs on central atom |
| b. | $sp^{3}$-hybridatoin | b. | $sp^{2}$ hybridisation |
| c. | Electronic geometry-distorted tetrahedral | c. | Electronic geometry- Trigonal planar |
| d. | Molecular geometry/shape-pyramidal | d. | Molecular geometry shape - trigonal planar |
| a. | $4 \sigma$ bond | a. | $4 \sigma$ bonds |
| b. | $sp^{3}$-hybridatoin | b. | $sp^{3}$ hybridisation |
| c. | Electronic geometry-tetrahedral | c. | Electronic geometry- tetrahedral |
| d. | Molecular geometry/shape-tetrahedral | d. | Molecular geometry: tetrahedral |