Which one of the following is not an electron deficient compound
Electron deficient compounds are those for which the octet is incomplete. In BCl3, Boron has only 6 electrons in outermost shell. Similarly, in AlCl3, Al has only 6 electrons in the outermost shell. Al2Cl6 is not an electron deficient compound since it has a coordinate bond among Al and Cl atoms between one AlCl3 molecule and the other, In B2H6also, boron has only 6 electrons in the outermost shell.