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: B3PW91/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3PW91/6-31G
 hartrees
Energy at 0K-151.102611
Energy at 298.15K 
HF Energy-151.102611
Nuclear repulsion energy82.751253
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 B3PW91/6-31G
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 3567 3416 0.48      
2 A1 3081 2950 51.74      
3 A1 1714 1641 48.38      
4 A1 1514 1450 2.98      
5 A1 1077 1031 66.88      
6 A1 666 638 117.94      
7 A1 454 435 6.02      
8 A2 3693 3537 0.00      
9 A2 1411 1351 0.00      
10 A2 1060 1015 0.00      
11 A2 247 236 0.00      
12 B1 3693 3537 1.20      
13 B1 3135 3003 33.90      
14 B1 1357 1300 1.02      
15 B1 840 804 1.97      
16 B1 417 400 93.05      
17 B2 3568 3418 0.01      
18 B2 1703 1631 14.48      
19 B2 1420 1360 6.67      
20 B2 1094 1048 128.77      
21 B2 460 440 614.08      

Unscaled Zero Point Vibrational Energy (zpe) 18084.6 cm-1
Scaled (by 0.9577) Zero Point Vibrational Energy (zpe) 17319.7 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 B3PW91/6-31G
See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.539
N2 0.000 1.257 -0.197
N3 0.000 -1.257 -0.197
H4 0.879 0.000 1.192
H5 -0.879 0.000 1.192
H6 0.843 1.472 -0.713
H7 -0.843 1.472 -0.713
H8 -0.843 -1.472 -0.713
H9 0.843 -1.472 -0.713

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45701.45701.09491.09492.10852.10852.10852.1085
N21.45702.51462.06962.06961.01141.01142.90302.9030
N31.45702.51462.06962.06962.90302.90301.01141.0114
H41.09492.06962.06961.75712.40822.96002.96002.4082
H51.09492.06962.06961.75712.96002.40822.40822.9600
H62.10851.01142.90302.40822.96001.68603.39302.9445
H72.10851.01142.90302.96002.40821.68602.94453.3930
H82.10852.90301.01142.96002.40823.39302.94451.6860
H92.10852.90301.01142.40822.96002.94453.39301.6860

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 116.175 C1 N2 H7 116.175
C1 N3 H8 116.175 C1 N3 H9 116.175
N2 C1 N3 119.300 N2 C1 H4 107.549
N2 C1 H5 107.549 N3 C1 H4 107.549
N3 C1 H5 107.549 H4 C1 H5 106.729
H6 N2 H7 112.913 H8 N3 H9 112.913
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.076      
2 N -0.724      
3 N -0.724      
4 H 0.180      
5 H 0.180      
6 H 0.291      
7 H 0.291      
8 H 0.291      
9 H 0.291      


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 -2.060 2.060
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.083 0.000 0.000
y 0.000 -24.097 0.000
z 0.000 0.000 -18.461
Traceless
 xyz
x 5.196 0.000 0.000
y 0.000 -6.825 0.000
z 0.000 0.000 1.629
Polar
3z2-r23.258
x2-y28.014
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.771 0.000 0.000
y 0.000 3.886 0.000
z 0.000 0.000 3.163


<r2> (average value of r2) Å2
<r2> 54.561
(<r2>)1/2 7.387