Problem: Arrange the following ACln species in order of  decreasing  Cl—A—Cl bond angles:SCl2, OCl2, PCl3, SiCl4, SiCl62−.

FREE Expert Solution

Electron Regions          Electronic Geometry          Bond Angles

2                                      linear                                    180˚

3                                      trigonal planar                      120˚

4                                      tetrahedral                            109.5˚

5                                      trigonal bipyramidal              90˚, 120˚, and 180˚

6                                      octahedral                            90˚ and 180˚


Lone pairs are treated as electron regions. 

The lone pairs in the central atom will make the bond angles smaller than expected. 


A) SCl

  • S → group 6A → 2 lone pairs
  • 2 LP + 2 atoms = 4 regions → tetrahedral
  • <109.5°

B) OCl2

  • S → group 6A → 2 lone pairs
  • 2 LP + 2 atoms = 4 regions → tetrahedral
  • <109.5°

C) PCl3

  • P → group 5A → 1 lone pair
  • 1 LP + 3 atoms = 4 regions → tetrahedral
  • <109.5° but larger than first two since only 1 lone pair. 


D) SiCl4 

  • Si → group 4A → 0lone pairs
  • 4 atoms = 4 regions → tetrahedral
  • 109.5°


89% (302 ratings)
View Complete Written Solution
Problem Details

Arrange the following ACln species in order of  decreasing  Cl—A—Cl bond angles:

SCl2, OCl2, PCl3, SiCl4, SiCl62−.

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Bond Angles concept. You can view video lessons to learn Bond Angles. Or if you need more Bond Angles practice, you can also practice Bond Angles practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Davidson's class at UTSA.

What textbook is this problem found in?

Our data indicates that this problem or a close variation was asked in Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition. You can also practice Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition practice problems.