H2N-CHO molecule has been considered in the planar configuration, as established in the former works. The TS structure has been identified by means of the QST2 algorithm and verified with the frequency calculation for the normal vibrational modes. The reaction progress parameter () has been calculated in the mass-weighted coordinates at 105 points over reaction path covering the range (-2.90 <  < +2.50). The Cartesian Hessian has been calculated for each single point on the trajectory using the geometry of the structures on the IRC; the elements of the DF connectivity matrix have been calculated by proper summation of Cartesian Hessian elements: CAB=kAx,Bx+kAy,By+kAz,Bz.