Question

What are electron deficient and electron rich compounds of hydrogen give examples

Answer 1

Group 13 hydrides (Compounds with hydrogen), mainly Hydrides of Al and B are called electron deficient hydrides. Elements of this group have 3 valence electrons and therefore can only form bonds with 3 hydrogen atoms.

Answer 2

Answer :

Electron deficient hydrides: Compounds in which central atom has incomplete octet, are called electron deficient hydrides. For example, BeH2, BH3 are electron deficient hydrides.

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(ii) Electron precise hydrides: Those compounds in which exact number of electrons are present in central atom or the central atom contains complete octet are called precise hydrides e.g., CH4, SiH4, GeH4 etc. are precise hydrides.

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(iii) Electron rich hydrides: Those compounds in which central atom has one or more lone pair of excess electrons are called electron rich hydrides, e.g.,NH3, H2O.