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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: CISD/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 CISD/6-31G
 hartrees
Energy at 0K-150.481322
Energy at 298.15K-150.489261
HF Energy-150.174032
Nuclear repulsion energy82.438443
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/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 3598 3374 0.40      
2 A1 3118 2924 45.79      
3 A1 1777 1666 53.05      
4 A1 1562 1465 0.76      
5 A1 1101 1032 86.91      
6 A1 774 726 68.06      
7 A1 467 438 0.01      
8 A2 3710 3480 0.00      
9 A2 1443 1353 0.00      
10 A2 1094 1026 0.00      
11 A2 270 253 0.00      
12 B1 3710 3480 0.36      
13 B1 3168 2971 34.44      
14 B1 1413 1325 0.64      
15 B1 858 804 0.10      
16 B1 416 390 110.91      
17 B2 3596 3372 0.02      
18 B2 1766 1657 7.96      
19 B2 1454 1364 9.77      
20 B2 1110 1041 86.54      
21 B2 617 579 613.90      

Unscaled Zero Point Vibrational Energy (zpe) 18511.6 cm-1
Scaled (by 0.9378) Zero Point Vibrational Energy (zpe) 17360.1 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/6-31G
ABC
1.18809 0.29249 0.26749

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/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 1.265 -0.197
N3 0.000 -1.265 -0.197
H4 0.882 0.000 1.198
H5 -0.882 0.000 1.198
H6 0.838 1.444 -0.734
H7 -0.838 1.444 -0.734
H8 -0.838 -1.444 -0.734
H9 0.838 -1.444 -0.734

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46961.46961.09401.09402.10682.10682.10682.1068
N21.46962.53032.07982.07981.01151.01152.88642.8864
N31.46962.53032.07982.07982.88642.88641.01151.0115
H41.09402.07982.07981.76332.41272.96282.96282.4127
H51.09402.07982.07981.76332.96282.41272.41272.9628
H62.10681.01152.88642.41272.96281.67693.33982.8883
H72.10681.01152.88642.96282.41271.67692.88833.3398
H82.10682.88641.01152.96282.41273.33982.88831.6769
H92.10682.88641.01152.41272.96282.88833.33981.6769

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 114.985 C1 N2 H7 114.985
C1 N3 H8 114.985 C1 N3 H9 114.985
N2 C1 N3 118.821 N2 C1 H4 107.535
N2 C1 H5 107.535 N3 C1 H4 107.535
N3 C1 H5 107.535 H4 C1 H5 107.393
H6 N2 H7 111.979 H8 N3 H9 111.979
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability