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SCC215

NH3 Testing

Calculation Method RB3LYP

Basis Set 6-31G(d,p)

Charge 0

Spin Singlet

E(RB3LYP) -56.55776873

RMS Gradient Norm 0.00000485

Imaginary Freq 0

Dipole Moment 1.8466

Point Group C3V

       Item               Value     Threshold  Converged?
Maximum Force            0.000004     0.000450     YES
RMS     Force            0.000004     0.000300     YES
Maximum Displacement     0.000072     0.001800     YES
RMS     Displacement     0.000035     0.001200     YES
Predicted change in Energy=-5.986282D-10


test molecule

The optimisation file is linked to crap


From the displayed vibration, it is expected to have 6 modes of vibration, which is identical to number of modes shown. Vibration modes 2 and 3 are said to be a degenerated pair, while 5 and 6 are also said to be degenerated. Vibration modes 1,2 and 3 are bending, while vibration modes 4,5 and 6 are bond stretch. Vibration modes 1 and 4 are highly symmetric. Vibration mode 1 is the "umbrella mode". There are two sets of degenerated peaks, remaining four sets of peaks left. Among these four peaks, absorption peaks of vibration modes 4 and 6 cannot be seen due to their low intensity.

charge distribution of NH3 .

N2 Optimization

Calculation Method RB3LYP

Basis Set 6-31G(d,p)

Charge 0

Spin Singlet

E(RB3LYP) -109.52412868

RMS Gradient Norm 0.00000060

Imaginary Freq 0

Dipole Moment 0.0000

Point Group D*H

 Item               Value     Threshold  Converged?
Maximum Force            0.000001     0.000450     YES
RMS     Force            0.000001     0.000300     YES
Maximum Displacement     0.000000     0.001800     YES
RMS     Displacement     0.000000     0.001200     YES
Predicted change in Energy=-3.401005D-13


        Item               Value     Threshold  Converged?
Maximum Force            0.000000     0.000450     YES
RMS     Force            0.000000     0.000300     YES
Maximum Displacement     0.000000     0.001800     YES
RMS     Displacement     0.000001     0.001200     YES
Predicted change in Energy=-1.164080D-13R1 


H2 Optimization

Calculation Method RB3LYP Basis Set 6-31G(d,p) Charge 0 Spin Singlet E(RB3LYP) -1.17853936 RMS Gradient Norm 0.00000017 Imaginary Freq 0 Dipole Moment 0.0000 Point Group D*H


        Item               Value     Threshold  Converged?
Maximum Force            0.000000     0.000450     YES
RMS     Force            0.000000     0.000300     YES
Maximum Displacement     0.000000     0.001800     YES
RMS     Displacement     0.000001     0.001200     YES
Predicted change in Energy=-1.164080D-13R1