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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: MP4=FULL/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 MP4=FULL/3-21G
 hartrees
Energy at 0K-149.747898
Energy at 298.15K-149.755898
HF Energy-149.399232
Nuclear repulsion energy81.430619
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=FULL/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 3351 3280        
2 A1 3061 2996        
3 A1 1750 1713        
4 A1 1544 1512        
5 A1 1097 1074        
6 A1 781 764        
7 A1 436 427        
8 A2 3450 3377        
9 A2 1427 1396        
10 A2 1095 1072        
11 A2 299 292        
12 B1 3451 3377        
13 B1 3111 3046        
14 B1 1391 1362        
15 B1 835 818        
16 B1 433 423        
17 B2 3352 3281        
18 B2 1737 1700        
19 B2 1412 1382        
20 B2 1033 1011        
21 B2 716 700        

Unscaled Zero Point Vibrational Energy (zpe) 17880.9 cm-1
Scaled (by 0.9788) Zero Point Vibrational Energy (zpe) 17501.9 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=FULL/3-21G
ABC
1.15016 0.28649 0.26067

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.565
N2 0.000 1.293 -0.190
N3 0.000 -1.293 -0.190
H4 0.889 0.000 1.207
H5 -0.889 0.000 1.207
H6 0.836 1.373 -0.784
H7 -0.836 1.373 -0.784
H8 -0.836 -1.373 -0.784
H9 0.836 -1.373 -0.784

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.49761.49761.09671.09672.09802.09802.09802.0980
N21.49762.58632.10112.10111.02851.02852.85612.8561
N31.49762.58632.10112.10112.85612.85611.02851.0285
H41.09672.10112.10111.77862.41812.97032.97032.4181
H51.09672.10112.10111.77862.97032.41812.41812.9703
H62.09801.02852.85612.41812.97031.67293.21462.7450
H72.09801.02852.85612.97032.41811.67292.74503.2146
H82.09802.85611.02852.97032.41813.21462.74501.6729
H92.09802.85611.02852.41812.97032.74503.21461.6729

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.945 C1 N2 H7 110.945
C1 N3 H8 110.945 C1 N3 H9 110.945
N2 C1 N3 119.428 N2 C1 H4 107.165
N2 C1 H5 107.165 N3 C1 H4 107.165
N3 C1 H5 107.165 H4 C1 H5 108.368
H6 N2 H7 108.834 H8 N3 H9 108.834
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability