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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: PBE1PBE/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at PBE1PBE/cc-pVTZ
 hartrees
Energy at 0K-151.091724
Energy at 298.15K-151.099708
HF Energy-151.091724
Nuclear repulsion energy83.464741
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 PBE1PBE/cc-pVTZ
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 3521 3383 1.02      
2 A1 3062 2942 38.32      
3 A1 1664 1599 42.44      
4 A1 1484 1426 0.32      
5 A1 1107 1064 35.18      
6 A1 857 824 2.70      
7 A1 458 440 2.95      
8 A2 3608 3467 0.00      
9 A2 1397 1343 0.00      
10 A2 1074 1032 0.00      
11 A2 252 242 0.00      
12 B1 3605 3465 0.70      
13 B1 3103 2982 24.84      
14 B1 1372 1318 0.32      
15 B1 848 815 0.08      
16 B1 389 374 81.45      
17 B2 3521 3384 1.16      
18 B2 1653 1589 5.40      
19 B2 1385 1331 17.79      
20 B2 1103 1060 79.62      
21 B2 782 751 410.61      

Unscaled Zero Point Vibrational Energy (zpe) 18121.3 cm-1
Scaled (by 0.961) Zero Point Vibrational Energy (zpe) 17414.5 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 PBE1PBE/cc-pVTZ
ABC
1.19423 0.30479 0.27640

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.548
N2 0.000 1.254 -0.183
N3 0.000 -1.254 -0.183
H4 0.876 0.000 1.201
H5 -0.876 0.000 1.201
H6 0.814 1.320 -0.782
H7 -0.814 1.320 -0.782
H8 -0.814 -1.320 -0.782
H9 0.814 -1.320 -0.782

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45181.45181.09251.09252.04292.04292.04292.0429
N21.45182.50872.06292.06291.01251.01252.76582.7658
N31.45182.50872.06292.06292.76582.76581.01251.0125
H41.09252.06292.06291.75202.38272.92042.92042.3827
H51.09252.06292.06291.75202.92042.38272.38272.9204
H62.04291.01252.76582.38272.92041.62773.10202.6406
H72.04291.01252.76582.92042.38271.62772.64063.1020
H82.04292.76581.01252.92042.38273.10202.64061.6277
H92.04292.76581.01252.38272.92042.64063.10201.6277

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.732 C1 N2 H7 110.732
C1 N3 H8 110.732 C1 N3 H9 110.732
N2 C1 N3 119.541 N2 C1 H4 107.509
N2 C1 H5 107.509 N3 C1 H4 107.509
N3 C1 H5 107.509 H4 C1 H5 106.608
H6 N2 H7 106.988 H8 N3 H9 106.988
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.035      
2 N -0.311      
3 N -0.311      
4 H 0.094      
5 H 0.094      
6 H 0.117      
7 H 0.117      
8 H 0.117      
9 H 0.117      


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 -1.806 1.806
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.815 0.000 0.000
y 0.000 -25.669 0.000
z 0.000 0.000 -18.297
Traceless
 xyz
x 5.168 0.000 0.000
y 0.000 -8.113 0.000
z 0.000 0.000 2.945
Polar
3z2-r25.891
x2-y28.854
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.385 0.000 0.000
y 0.000 4.874 0.000
z 0.000 0.000 4.470


<r2> (average value of r2) Å2
<r2> 53.437
(<r2>)1/2 7.310