Which of the following is an electron-deficient molecule?

CHEMISTRY · Single correct · A Level · Chemistry · Bonding · Bonding

Problem

Which of the following is an electron-deficient molecule? (1)

\text{LiH}

(2)

\text{B}_2\text{H}_6

(3)

\text{LiBH}_4

(4)

\text{B}_3\text{N}_3\text{H}_6