return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: HF/CEP-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 HF/CEP-31G
 hartrees
Energy at 0K-28.262240
Energy at 298.15K-28.269981
HF Energy-28.262240
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy50.089096
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 HF/CEP-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 3797 3423 0.16      
2 A1 3277 2954 88.75      
3 A1 1829 1649 60.24      
4 A1 1627 1466 0.80      
5 A1 1126 1015 98.74      
6 A1 720 649 190.54      
7 A1 476 429 15.00      
8 A2 3932 3544 0.00      
9 A2 1499 1351 0.00      
10 A2 1106 997 0.00      
11 A2 209 189 0.00      
12 B1 3933 3545 3.68      
13 B1 3333 3005 70.59      
14 B1 1441 1299 2.46      
15 B1 891 803 0.65      
16 B1 374 337 98.14      
17 B2 3799 3424 0.11      
18 B2 1824 1645 38.16      
19 B2 1518 1368 16.25      
20 B2 1184 1067 187.30      
21 B2 490 442 632.00      

Unscaled Zero Point Vibrational Energy (zpe) 19192.5 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 17300.1 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 HF/CEP-31G
ABC
1.20367 0.29254 0.26811

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.549
N2 0.000 1.257 -0.205
N3 0.000 -1.257 -0.205
H4 0.876 0.000 1.191
H5 -0.876 0.000 1.191
H6 0.838 1.493 -0.700
H7 -0.838 1.493 -0.700
H8 -0.838 -1.493 -0.700
H9 0.838 -1.493 -0.700

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46621.46621.08581.08582.11912.11912.11912.1191
N21.46622.51452.07282.07281.00131.00132.91692.9169
N31.46622.51452.07282.07282.91692.91691.00131.0013
H41.08582.07282.07281.75192.40932.95652.95652.4093
H51.08582.07282.07281.75192.95652.40932.40932.9565
H62.11911.00132.91692.40932.95651.67593.42332.9850
H72.11911.00132.91692.95652.40931.67592.98503.4233
H82.11912.91691.00132.95652.40933.42332.98501.6759
H92.11912.91691.00132.40932.95652.98503.42331.6759

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 117.119 C1 N2 H7 117.119
C1 N3 H8 117.119 C1 N3 H9 117.119
N2 C1 N3 118.075 N2 C1 H4 107.699
N2 C1 H5 107.699 N3 C1 H4 107.699
N3 C1 H5 107.699 H4 C1 H5 107.554
H6 N2 H7 113.625 H8 N3 H9 113.625
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.190      
2 N -0.603      
3 N -0.603      
4 H 0.150      
5 H 0.150      
6 H 0.274      
7 H 0.274      
8 H 0.274      
9 H 0.274      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -1.991 1.991
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.035 0.000 0.000
y 0.000 -25.054 0.000
z 0.000 0.000 -18.798
Traceless
 xyz
x 5.890 0.000 0.000
y 0.000 -7.637 0.000
z 0.000 0.000 1.747
Polar
3z2-r23.494
x2-y29.018
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.609 0.000 0.000
y 0.000 3.537 0.000
z 0.000 0.000 2.952


<r2> (average value of r2) Å2
<r2> 47.952
(<r2>)1/2 6.925