9.8 What do you understand by (i) electron-deficient, (ii) electron-precise, and (iii) electron-rich compounds of hydrogen? Provide justification with suitable examples.
ANswer-
(i)Electron-deficient hydrides-
Those compounds having fewer electrons to writing its conventional Lewis structure. examples (all the elements of group 13 form electron deficient hydrides)
(ii)Electron-precise hydrides-
Those compounds have the required number of electrons to write their conventional Lewis structure. ex- (all elements of group 14 form such compounds)
(iii)Electron-rich hydrides-
Electron-rich hydrides have excess electrons which are present as lone pairs. elements of group 15-17 form such compounds like has one lone pair and two lone pair respectively.