Question

Why can’t molecules with the following formulas exist

a) $C{H}_5$ (b)$C_2{H}_{6}N$(c)$C_3{H}_{5}Br$

Short answer

Answer

The formula $C_2{H}_{6}N$can’t exist.

Step-by-step solution

Stability of molecule

A structure formed by the guidelines of octet and valence electrons is considered stable. In contrast, a system with atoms without an entire outer shell of electrons is unstable.

Given molecule can’t exist

The formula$C_2{H}_{6}N$ requires that carbon exceeds four bonds, or be short of two outer shell electrons or nitrogen should remain except for three bonds.

Evidence for non-existence

The structures are represented as follows.

C-N bond formation