Following the formal analysis presented in Section 4 and 5, the practical consequences of the diagonalization of the DF connectivity matrix have been analyzed. The atomic modes have been tested as a tool for tracing a role of atoms in evolution of a system on a reaction path for the proton transfer reaction in formamide. Also, the contributions of individual bonds/contacts to the vibrational energy of and to anharmonicity parameter of this reacting system have been tested.