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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: CID/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CID/3-21G*
 hartrees
Energy at 0K-149.703712
Energy at 298.15K-149.711737
HF Energy-149.401657
Nuclear repulsion energy82.087572
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at CID/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3485 3242 4.10      
2 A1 3135 2918 37.91      
3 A1 1789 1665 36.27      
4 A1 1582 1472 0.87      
5 A1 1110 1033 66.05      
6 A1 803 747 8.86      
7 A1 453 422 5.01      
8 A2 3579 3330 0.00      
9 A2 1461 1360 0.00      
10 A2 1114 1036 0.00      
11 A2 294 273 0.00      
12 B1 3579 3330 2.83      
13 B1 3180 2959 27.69      
14 B1 1420 1321 0.14      
15 B1 857 797 0.08      
16 B1 431 401 122.65      
17 B2 3483 3241 1.02      
18 B2 1777 1654 1.11      
19 B2 1450 1350 6.91      
20 B2 1072 997 20.71      
21 B2 709 660 559.95      

Unscaled Zero Point Vibrational Energy (zpe) 18380.9 cm-1
Scaled (by 0.9305) Zero Point Vibrational Energy (zpe) 17103.4 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at CID/3-21G*
ABC
1.16615 0.29146 0.26527

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.560
N2 0.000 1.278 -0.192
N3 0.000 -1.278 -0.192
H4 0.883 0.000 1.202
H5 -0.883 0.000 1.202
H6 0.834 1.385 -0.768
H7 -0.834 1.385 -0.768
H8 -0.834 -1.385 -0.768
H9 0.834 -1.385 -0.768

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.48301.48301.09101.09102.09282.09282.09282.0928
N21.48302.55562.08692.08691.01901.01902.84952.8495
N31.48302.55562.08692.08692.84952.84951.01901.0190
H41.09102.08692.08691.76502.40892.95732.95732.4089
H51.09102.08692.08691.76502.95732.40892.40892.9573
H62.09281.01902.84952.40892.95731.66753.23392.7708
H72.09281.01902.84952.95732.40891.66752.77083.2339
H82.09282.84951.01902.95732.40893.23392.77081.6675
H92.09282.84951.01902.40892.95732.77083.23391.6675

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 112.199 C1 N2 H7 112.199
C1 N3 H8 112.199 C1 N3 H9 112.199
N2 C1 N3 119.006 N2 C1 H4 107.360
N2 C1 H5 107.360 N3 C1 H4 107.360
N3 C1 H5 107.360 H4 C1 H5 107.979
H6 N2 H7 109.801 H8 N3 H9 109.801
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability