How does electron deficient compound achieve electronic saturation, i. e., fully occupied outer electron shells?

How does electron deficient compound achieve electronic saturation, i

1.	How does electron deficient compound achieve electronic saturation, i. e., fully occupied outer electron shells?
Answer» To attain stability all atoms, need filled outer shell i.e. outer shell is filled with 8 electrons ii) We know that boron has only 3 electrons in its outermost shell and fluorine has only 7 electrons in its outermost shell iii) The three-excess electron in the boron PAIRED with three fluorine atoms to form . Now we have 3 electron pairs (6 electrons); but what we need is 4 electron pairs (8 electrons) to attain STABLE state. so, there is the deficient of electrons iv) Finally, boron ALWAYS in NATURE have an affinity for two more electrons preferably lone pair of some other atom