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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: CISD/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 CISD/3-21G*
 hartrees
Energy at 0K-149.705739
Energy at 298.15K-149.713759
HF Energy-149.401537
Nuclear repulsion energy82.024238
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 CISD/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 3475 3247 4.27      
2 A1 3130 2925 38.15      
3 A1 1786 1668 35.58      
4 A1 1580 1476 0.84      
5 A1 1107 1035 65.47      
6 A1 800 748 8.23      
7 A1 451 422 5.11      
8 A2 3568 3334 0.00      
9 A2 1459 1363 0.00      
10 A2 1111 1038 0.00      
11 A2 294 275 0.00      
12 B1 3569 3335 3.05      
13 B1 3175 2967 27.90      
14 B1 1417 1324 0.15      
15 B1 855 799 0.09      
16 B1 432 403 122.28      
17 B2 3472 3245 1.09      
18 B2 1773 1657 0.96      
19 B2 1448 1353 7.07      
20 B2 1065 995 19.89      
21 B2 707 661 563.70      

Unscaled Zero Point Vibrational Energy (zpe) 18336.8 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 17133.9 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 CISD/3-21G*
ABC
1.16530 0.29084 0.26474

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.561
N2 0.000 1.279 -0.192
N3 0.000 -1.279 -0.192
H4 0.883 0.000 1.202
H5 -0.883 0.000 1.202
H6 0.834 1.386 -0.769
H7 -0.834 1.386 -0.769
H8 -0.834 -1.386 -0.769
H9 0.834 -1.386 -0.769

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.48441.48441.09121.09122.09392.09392.09392.0939
N21.48442.55872.08792.08791.01961.01962.85182.8518
N31.48442.55872.08792.08792.85182.85181.01961.0196
H41.09122.08792.08791.76602.40982.95852.95852.4098
H51.09122.08792.08791.76602.95852.40982.40982.9585
H62.09391.01962.85182.40982.95851.66813.23542.7722
H72.09391.01962.85182.95852.40981.66812.77223.2354
H82.09392.85181.01962.95852.40983.23542.77221.6681
H92.09392.85181.01962.40982.95852.77223.23541.6681

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 112.152 C1 N2 H7 112.152
C1 N3 H8 112.152 C1 N3 H9 112.152
N2 C1 N3 119.054 N2 C1 H4 107.334
N2 C1 H5 107.334 N3 C1 H4 107.334
N3 C1 H5 107.334 H4 C1 H5 108.039
H6 N2 H7 109.768 H8 N3 H9 109.768
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability