Which of the following species do not exist?

CHEMISTRY · Multi correct · A Level · Chemistry · Bonding · Bonding

Problem

Which of the following species do not exist? (1)

\mathrm{OF_4}

(2)

\mathrm{NH_2^-}

(3)

\mathrm{NCl_5}

(4)

\mathrm{ICl_3^+}