Question

If the symbol X represents a central atom, Y represents outer atoms, and Z represents lone pairs on the central atom, the structure Y-:X:-Y could be abbreviated as XY2Z2.
Classify these structures according to their shape.
XY2Z,XY2Z2,XY2Z3,XY3Z,XY3Z2,XY4Z,XY4Z2,XY5Z The categories are linear, bent(~120), bent(~109), trigonal pyramidal, t-shaped, see-saw, square planar, square pyramidal

Answer 1

 XY4Z2-->Square planar (Electron domain geometry: Octahedral) sp3d2 
XY4Z-->Seesaw (Electron domain geometry: Trigonal bipyramidal) sp3d 
XY5Z-->Square pyramidal (Electron domain geometry: Octahedral) sp3d2 
XY2Z3-->Linear (Electron domain geometry: Trigonal bipyramidal) sp3d 
XY2Z-->Bent (Electron domain geometry: Trigonal planar) sp2 
XY3Z-->Trigonal pyramidal (Electron domain geometry: Tetrahedral) sp3 
XY2Z2-->Linear (Electron domain geometry: Tetrahedral) sp3 
XY3Z2-->T shaped (Electron domain geometry: Trigonal bipryamidal) sp3d 
XY2-->Linear (Electron domain geometry: Linear) sp 
XY3 Trigonal planar (Electron geometry: Trigonal planar) sp2 
XY4-->Tetrahedral (Electron domain geometry: tetrahedral) sp3 
XY5-->Trigonal bipyramidal (Electron domain geometry: Trigonal bipyramidal) sp3d 
XY6-->Octahedral (Electron domain geometry: Octahedral) sp3d2

Answer 2

Answer:

1) Bent(120)

2) Bent (109)

3) Linear

4)Trigonal Pyramidal

5)t-shaped

6)see-saw

7)Square planar

8)Square pyramidal

Explanation:

1) XY₂Z:

Central atom = X

# Bonds around X = 2 X-Y bonds

# Lone pairs = 1

Shape = Bent (~120)

2) XY₂Z₂:

Central atom = X

# Bonds around X = 2 X-Y bonds

# Lone pairs = 2

Shape = Bent (~109)

3) XY₂Z₃:

Central atom = X

# Bonds around X = 2 X-Y bonds

# Lone pairs =3

Shape = Linear

4) XY₃Z:

Central atom = X

# Bonds around X = 3 X-Y bonds

# Lone pairs = 1

Shape = Trigonal Pyramidal

5) XY₃Z₂:

Central atom = X

# Bonds around X = 3 X-Y bonds

# Lone pairs = 2

Shape = t-shaped

6) XY₄Z:

Central atom = X

# Bonds around X = 2 X-Y bonds

# Lone pairs = 1

Shape = see-saw

7) XY₄Z₂:

Central atom = X

# Bonds around X = 4 X-Y bonds

# Lone pairs = 2

Shape = Square planar

8) XY₅Z:

Central atom = X

# Bonds around X = 5 X-Y bonds

# Lone pairs = 1

Shape = Square pyramidal