What is the Difference Between Clathrate and Inclusion Compound?

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The main difference between clathrate and inclusion compounds lies in the way they trap or contain guest molecules. Here is a comparison of the two types of compounds:

Clathrate Compounds:

  • Consist of a lattice that traps or contains molecules, with most clathrate compounds being polymeric.
  • The guest molecule is in a cage formed by the host molecule, which can be inorganic or organic.
  • The framework can be composed of cavities such as dodecahedral, tetrakaidecahedral, and hexakaidecahedral cavities.
  • Clathrates can be divided into two categories: clathrate hydrates and inorganic clathrates.

Inclusion Compounds:

  • Consist of one chemical compound as the host with a cavity into which a guest molecule can enter.
  • Inclusion compounds are chemical complexes, and the host-guest relationship is not limited to three-dimensional cages.
  • Examples of inclusion compounds include channel complexes and clathrate complexes.

In summary, clathrate compounds are a type of inclusion compound where the guest molecule is trapped or contained within a cage-like structure formed by the host molecule's lattice. In contrast, inclusion compounds have a host molecule with a cavity into which a guest molecule can enter, but the relationship between the host and guest molecules is not limited to three-dimensional cages.

Comparative Table: Clathrate vs Inclusion Compound

Clathrate and inclusion compounds are both types of host-guest complexes, but they differ in the way they interact with guest molecules. Here is a comparison table highlighting the differences between clathrate and inclusion compounds:

Feature Clathrate Compounds Inclusion Compounds
Definition Clathrate compounds are chemical compounds containing a lattice that can trap or contain molecules. Inclusion compounds are chemical complexes having one chemical compound as the host with a cavity into which a guest molecule can enter.
Guest Interaction Guest molecules are trapped or contained within the lattice structure. Guest molecules can enter and fit into the cavity formed by the host compound.
Example Clathrate hydrate, which is an inclusion compound with a cage-like structure formed by hydrogen-bonded water molecules that can hold gas molecules. Molecular encapsulation, where a guest molecule is trapped inside another molecule.

In summary, clathrate compounds can trap or contain molecules within their lattice structure, while inclusion compounds host a cavity into which guest molecules can enter.