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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: MP4/TZVP

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/TZVP
 hartrees
Energy at 0K-150.875145
Energy at 298.15K-150.883171
HF Energy-150.300014
Counterpoise corrected energy-150.875145
CP Energy at 298.15K-150.883171
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy83.013733
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/TZVP
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 3491 3362        
2 A1 3085 2971        
3 A1 1664 1602        
4 A1 1495 1439        
5 A1 1122 1080        
6 A1 880 847        
7 A1 452 435        
8 A2 3588 3455        
9 A2 1416 1363        
10 A2 1083 1043        
11 A2 260 251        
12 B1 3587 3454        
13 B1 3138 3022        
14 B1 1385 1333        
15 B1 859 828        
16 B1 397 383        
17 B2 3491 3362        
18 B2 1654 1593        
19 B2 1423 1370        
20 B2 1088 1048        
21 B2 835 804        

Unscaled Zero Point Vibrational Energy (zpe) 18197.0 cm-1
Scaled (by 0.9629) Zero Point Vibrational Energy (zpe) 17521.9 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/TZVP
ABC
1.17486 0.30191 0.27334

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.557
N2 0.000 1.262 -0.185
N3 0.000 -1.262 -0.185
H4 0.881 0.000 1.202
H5 -0.881 0.000 1.202
H6 0.817 1.313 -0.788
H7 -0.817 1.313 -0.788
H8 -0.817 -1.313 -0.788
H9 0.817 -1.313 -0.788

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46461.46461.09221.09222.04962.04962.04962.0496
N21.46462.52472.07262.07261.01641.01642.76832.7683
N31.46462.52472.07262.07262.76832.76831.01641.0164
H41.09222.07262.07261.76292.38512.92732.92732.3851
H51.09222.07262.07261.76292.92732.38512.38512.9273
H62.04961.01642.76832.38512.92731.63393.09302.6262
H72.04961.01642.76832.92732.38511.63392.62623.0930
H82.04962.76831.01642.92732.38513.09302.62621.6339
H92.04962.76831.01642.38512.92732.62623.09301.6339

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.096 C1 N2 H7 110.096
C1 N3 H8 110.096 C1 N3 H9 110.096
N2 C1 N3 119.067 N2 C1 H4 107.421
N2 C1 H5 107.421 N3 C1 H4 107.421
N3 C1 H5 107.421 H4 C1 H5 107.617
H6 N2 H7 106.989 H8 N3 H9 106.989
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability