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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: MP2/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/6-31G
 hartrees
Energy at 0K-150.485509
Energy at 298.15K-150.493451
HF Energy-150.172782
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy82.068651
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 MP2/6-31G
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 3536 3383 0.76      
2 A1 3101 2967 42.69      
3 A1 1753 1677 50.08      
4 A1 1547 1480 0.66      
5 A1 1087 1040 82.25      
6 A1 762 729 53.18      
7 A1 461 441 0.29      
8 A2 3661 3503 0.00      
9 A2 1427 1365 0.00      
10 A2 1082 1036 0.00      
11 A2 281 269 0.00      
12 B1 3661 3503 0.30      
13 B1 3162 3026 32.35      
14 B1 1398 1337 0.38      
15 B1 846 809 0.08      
16 B1 428 409 111.25      
17 B2 3538 3385 0.12      
18 B2 1742 1667 5.15      
19 B2 1436 1374 9.09      
20 B2 1080 1033 75.32      
21 B2 622 595 621.48      

Unscaled Zero Point Vibrational Energy (zpe) 18305.1 cm-1
Scaled (by 0.9568) Zero Point Vibrational Energy (zpe) 17514.3 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 MP2/6-31G
ABC
1.18279 0.28915 0.26469

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.551
N2 0.000 1.274 -0.196
N3 0.000 -1.274 -0.196
H4 0.885 0.000 1.198
H5 -0.885 0.000 1.198
H6 0.841 1.444 -0.741
H7 -0.841 1.444 -0.741
H8 -0.841 -1.444 -0.741
H9 0.841 -1.444 -0.741

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.47701.47701.09601.09602.11262.11262.11262.1126
N21.47702.54812.08532.08531.01671.01672.89722.8972
N31.47702.54812.08532.08532.89722.89721.01671.0167
H41.09602.08532.08531.77062.41762.97052.97052.4176
H51.09602.08532.08531.77062.97052.41762.41762.9705
H62.11261.01672.89722.41762.97051.68263.34282.8885
H72.11261.01672.89722.97052.41761.68262.88853.3428
H82.11262.89721.01672.97052.41763.34282.88851.6826
H92.11262.89721.01672.41762.97052.88853.34281.6826

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 114.553 C1 N2 H7 114.553
C1 N3 H8 114.553 C1 N3 H9 114.553
N2 C1 N3 119.210 N2 C1 H4 107.354
N2 C1 H5 107.354 N3 C1 H4 107.354
N3 C1 H5 107.354 H4 C1 H5 107.754
H6 N2 H7 111.690 H8 N3 H9 111.690
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability