PROPERTIES OF METALLIC HYDRIDES OR INTERSTITIAL HYDRIDE

PROPERTIES OF METALLIC HYDRIDES OR INTERSTITIAL HYDRIDE

1. These hydrides are formed by the element of  IB to VIII groups i.e. d block element.

2. These hydrides are called as metallic hydrides because they retain the properties of metals.

3. These hydrides are solids possess high melting points.

4. The hydrides on heating loose hydrogen and leaving behind metal unchanged.

5. Transition elements such as Ni, Pt, Pd etc, hide hydrogen in empty spaces between metal atoms in        their structures, which are called as interstitial spaces. Due to this reason, these hydrides are called as “interstitial hydrides”.

6. These hydrides don’t  show definite atomic ratio in metal to hydrogen atoms and are not stoichiometric in nature.

For Example

                                                Zr₁  H_1.22 and  T_i.l H_1.7.

7. Since metallic hydrides are formed hydrides are formed due to occlusion (adsorption of hydrogen in the metals, hence these release hydrogen in atomic state on heating hence they are used as catalyst in hydrogenation reaction.