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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: HSEh1PBE/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 HSEh1PBE/6-31G
 hartrees
Energy at 0K-150.988172
Energy at 298.15K 
HF Energy-150.988172
Nuclear repulsion energy82.920618
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 HSEh1PBE/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 3429 0.22      
2 A1 3092 2958 50.28      
3 A1 1720 1646 49.98      
4 A1 1517 1451 3.02      
5 A1 1088 1041 66.23      
6 A1 672 643 120.09      
7 A1 455 435 6.89      
8 A2 3712 3551 0.00      
9 A2 1416 1355 0.00      
10 A2 1064 1018 0.00      
11 A2 243 233 0.00      
12 B1 3712 3551 2.03      
13 B1 3147 3011 32.78      
14 B1 1364 1305 1.03      
15 B1 843 806 1.96      
16 B1 417 399 93.30      
17 B2 3587 3431 0.08      
18 B2 1710 1635 15.68      
19 B2 1424 1362 6.58      
20 B2 1113 1064 129.91      
21 B2 460 440 615.24      

Unscaled Zero Point Vibrational Energy (zpe) 18168.9 cm-1
Scaled (by 0.9566) Zero Point Vibrational Energy (zpe) 17380.4 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 HSEh1PBE/6-31G
See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.538
N2 0.000 1.253 -0.197
N3 0.000 -1.253 -0.197
H4 0.878 0.000 1.192
H5 -0.878 0.000 1.192
H6 0.842 1.469 -0.712
H7 -0.842 1.469 -0.712
H8 -0.842 -1.469 -0.712
H9 0.842 -1.469 -0.712

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45321.45321.09451.09452.10462.10462.10462.1046
N21.45322.50692.06662.06661.01021.01022.89612.8961
N31.45322.50692.06662.06662.89612.89611.01021.0102
H41.09452.06662.06661.75562.40462.95632.95632.4046
H51.09452.06662.06661.75562.95632.40462.40462.9563
H62.10461.01022.89612.40462.95631.68473.38732.9386
H72.10461.01022.89612.95632.40461.68472.93863.3873
H82.10462.89611.01022.95632.40463.38732.93861.6847
H92.10462.89611.01022.40462.95632.93863.38731.6847

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 116.220 C1 N2 H7 116.220
C1 N3 H8 116.220 C1 N3 H9 116.220
N2 C1 N3 119.209 N2 C1 H4 107.590
N2 C1 H5 107.590 N3 C1 H4 107.590
N3 C1 H5 107.590 H4 C1 H5 106.647
H6 N2 H7 112.994 H8 N3 H9 112.994
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.078      
2 N -0.730      
3 N -0.730      
4 H 0.182      
5 H 0.182      
6 H 0.293      
7 H 0.293      
8 H 0.293      
9 H 0.293      


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 -2.053 2.053
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.123 0.000 0.000
y 0.000 -24.127 0.000
z 0.000 0.000 -18.522
Traceless
 xyz
x 5.202 0.000 0.000
y 0.000 -6.804 0.000
z 0.000 0.000 1.603
Polar
3z2-r23.205
x2-y28.004
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.759 0.000 0.000
y 0.000 3.853 0.000
z 0.000 0.000 3.152


<r2> (average value of r2) Å2
<r2> 54.393
(<r2>)1/2 7.375