Question

e^- deficient species are PH₃, B₂H₆, CCl₄, NH₃, LiH, BCl₃ = ?

(a) PH₃, B₂H₆

(b) CCl₄, NH₃

(c) BC1₃, B₂H₆

(d) LiH, BCl₃

Answer 1

(c) BC1₃, B₂H₆

In BCl₃, Boron has 3 valence electrons, after forming bonds with chlorine electrons around it increases to 6, but it still is short of 2 electrons. In B₂H₆, B forms 3C -2e^-bond and has less number of electrons. Hence, these are electron deficient species.