CN triple bond length in HCN, hydrogen cyanide is \(1.156\,\dot{A}\)
\(f_{res}=0.122\cfrac{c}{BL}\)
\(f_{res}=0.122*\cfrac{299792458}{1.156}*10^{10}\)
\(\cfrac{f_{res}}{10^{15}}=316.390\,Hz\)
Breaking Hydrogen Cyanide HCN CN Bond 316-831 Hz
This frequency will break nitrogen from carbon in hydrogen cyanide. As for cyanide ion in ammonia salt.
\(BL=1.14\,\dot{A}\)
\(f_{res}=0.122*\cfrac{299792458}{1.14}*10^{10}\)
\(\cfrac{f_{res}}{10^{15}}=320.831\,Hz\)
Breaking Ammonium Cyanide NH_4CN CN Bond 320-831 Hz
And life goes on.