What do you understand by: 1. Electron-deficient. 2. Electron-precise, and 3. Electron-rich compounds of hydrogen? Provide justification with suitable examples.

1. Electron-deficient hydrides: The hydrides of group 13 elements have an incomplete octet and hence are electron deficient molecules. They act as Lewis acids e.g., B_2H_6 2. Electron-precise hydrides: These compounds have the required number of electrons to write their conventional Lewis structures. All elements of group 14 form such compounds (e.g., CH_4) which have tetrahedral structure. 3. Electron rich compounds of hydrogen: These compounds have excess electrons which are present as lone pairs, elements of group 15-17 form such compounds, e.g., NH_3 has one lone pair, H_2O has two lone pairs and HF has three lone pairs.

What do you understand by: 1. Electron-deficient. 2. Electron-pre…

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Question

What do you understand by:

Electron-deficient.
Electron-precise, and
Electron-rich compounds of hydrogen? Provide justification with suitable examples.

✓

Answer

Electron-deficient hydrides: The hydrides of group 13 elements have an incomplete octet and hence are electron deficient molecules. They act as Lewis acids e.g., $B_2H_6$
Electron-precise hydrides: These compounds have the required number of electrons to write their conventional Lewis structures. All elements of group 14 form such compounds (e.g., $CH_4$) which have tetrahedral structure.
Electron rich compounds of hydrogen: These compounds have excess electrons which are present as lone pairs, elements of group 15-17 form such compounds, e.g., $NH_3$ has one lone pair, $H_2O$ has two lone pairs and HF has three lone pairs.

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$\text{CH}_3-\text{CH}_2-\text{CH}_2-\text{CH}_2-\text{OH}$
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