Question

Among the following molecules or ions, which has the longest C - N bond?

• A. $H_{2}CNC{H}_3$
• B. $H_{3}CCN$
• C. $(H_{3}C{)}_4{N}^{+}$
• D. $(H_{2}C{)}_2{N}^{+}$

Answer 1

Answer: (C)

$(H_{3}C{)}_4{N}^{+}$

Option (C) $(H_{3}C{)}_4{N}^{+}$ has the longest C - N bond. The bond order of C-N bond in option (C) is exactly 1. All other options have bonds with bond order greater than one.