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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-150.674681
Energy at 298.15K-150.682821
HF Energy-150.236515
Nuclear repulsion energy83.383356
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 3585 3319 0.56      
2 A1 3173 2938 41.62      
3 A1 1768 1637 53.35      
4 A1 1579 1462 0.10      
5 A1 1172 1085 44.05      
6 A1 937 867 0.36      
7 A1 477 442 6.85      
8 A2 3674 3401 0.00      
9 A2 1463 1354 0.00      
10 A2 1119 1036 0.00      
11 A2 291 269 0.00      
12 B1 3672 3400 0.01      
13 B1 3223 2984 31.47      
14 B1 1445 1337 0.14      
15 B1 888 822 0.87      
16 B1 418 387 115.98      
17 B2 3583 3317 0.03      
18 B2 1759 1628 3.20      
19 B2 1461 1352 26.11      
20 B2 1157 1071 75.60      
21 B2 870 806 443.14      

Unscaled Zero Point Vibrational Energy (zpe) 18855.4 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 17456.3 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
1.18129 0.30546 0.27624

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 0.555
N2 0.000 1.254 -0.185
N3 0.000 -1.254 -0.185
H4 0.877 0.000 1.202
H5 -0.877 0.000 1.202
H6 0.813 1.309 -0.787
H7 -0.813 1.309 -0.787
H8 -0.813 -1.309 -0.787
H9 0.813 -1.309 -0.787

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45641.45641.08971.08972.04342.04342.04342.0434
N21.45642.50882.06552.06551.01351.01352.75562.7556
N31.45642.50882.06552.06552.75562.75561.01351.0135
H41.08972.06552.06551.75372.38192.92002.92002.3819
H51.08972.06552.06551.75372.92002.38192.38192.9200
H62.04341.01352.75562.38192.92001.62683.08172.6173
H72.04341.01352.75562.92002.38191.62682.61733.0817
H82.04342.75561.01352.92002.38193.08172.61731.6268
H92.04342.75561.01352.38192.92002.61733.08171.6268

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.363 C1 N2 H7 110.363
C1 N3 H8 110.363 C1 N3 H9 110.363
N2 C1 N3 118.923 N2 C1 H4 107.559
N2 C1 H5 107.559 N3 C1 H4 107.559
N3 C1 H5 107.559 H4 C1 H5 107.153
H6 N2 H7 106.758 H8 N3 H9 106.758
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability