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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: MP4/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP4/aug-cc-pVDZ
 hartrees
Energy at 0K-150.845683
Energy at 298.15K-150.853632
HF Energy-150.271208
Counterpoise corrected energy-150.845683
CP Energy at 298.15K-150.853632
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy82.441787
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 MP4/6-31G*
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 3449 3370        
2 A1 3084 3013        
3 A1 1724 1684        
4 A1 1534 1498        
5 A1 1152 1126        
6 A1 906 885        
7 A1 460 449        
8 A2 3547 3465        
9 A2 1421 1388        
10 A2 1094 1069        
11 A2 294 287        
12 B1 3545 3463        
13 B1 3138 3066        
14 B1 1409 1377        
15 B1 864 844        
16 B1 418 408        
17 B2 3450 3371        
18 B2 1713 1674        
19 B2 1413 1381        
20 B2 1112 1086        
21 B2 866 846        

Unscaled Zero Point Vibrational Energy (zpe) 18296.4 cm-1
Scaled (by 0.9769) Zero Point Vibrational Energy (zpe) 17873.8 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 MP4/aug-cc-pVDZ
ABC
1.16084 0.29776 0.26960

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/aug-cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.559
N2 0.000 1.271 -0.185
N3 0.000 -1.271 -0.185
H4 0.890 0.000 1.212
H5 -0.890 0.000 1.212
H6 0.820 1.321 -0.797
H7 -0.820 1.321 -0.797
H8 -0.820 -1.321 -0.797
H9 0.820 -1.321 -0.797

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.47311.47311.10411.10412.06292.06292.06292.0629
N21.47312.54292.08832.08831.02401.02402.78712.7871
N31.47312.54292.08832.08832.78712.78711.02401.0240
H41.10412.08832.08831.78032.40562.95042.95042.4056
H51.10412.08832.08831.78032.95042.40562.40562.9504
H62.06291.02402.78712.40562.95041.63923.10962.6424
H72.06291.02402.78712.95042.40561.63922.64243.1096
H82.06292.78711.02402.95042.40563.10962.64241.6392
H92.06292.78711.02402.40562.95042.64243.10961.6392

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.103 C1 N2 H7 110.103
C1 N3 H8 110.103 C1 N3 H9 110.103
N2 C1 N3 119.332 N2 C1 H4 107.386
N2 C1 H5 107.386 N3 C1 H4 107.386
N3 C1 H5 107.386 H4 C1 H5 107.452
H6 N2 H7 106.341 H8 N3 H9 106.341
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability