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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: PBE1PBE/STO-3G

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/STO-3G
 hartrees
Energy at 0K-149.097271
Energy at 298.15K-149.105182
HF Energy-149.097271
Nuclear repulsion energy81.211119
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/STO-3G
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 3547 3129 29.95      
2 A1 3382 2983 3.33      
3 A1 1883 1661 7.35      
4 A1 1638 1445 0.21      
5 A1 1245 1098 5.71      
6 A1 936 826 3.63      
7 A1 444 392 15.26      
8 A2 3736 3295 0.00      
9 A2 1514 1336 0.00      
10 A2 1186 1046 0.00      
11 A2 301 266 0.00      
12 B1 3735 3295 24.46      
13 B1 3496 3084 0.04      
14 B1 1517 1338 2.88      
15 B1 900 794 0.33      
16 B1 394 348 113.99      
17 B2 3547 3128 1.65      
18 B2 1879 1658 0.56      
19 B2 1476 1302 18.58      
20 B2 1188 1048 0.00      
21 B2 945 833 238.24      

Unscaled Zero Point Vibrational Energy (zpe) 19443.7 cm-1
Scaled (by 0.8821) Zero Point Vibrational Energy (zpe) 17151.3 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 PBE1PBE/STO-3G
ABC
1.10072 0.29384 0.26352

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/STO-3G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.584
N2 0.000 1.294 -0.185
N3 0.000 -1.294 -0.185
H4 0.896 0.000 1.230
H5 -0.896 0.000 1.230
H6 0.824 1.229 -0.844
H7 -0.824 1.229 -0.844
H8 -0.824 -1.229 -0.844
H9 0.824 -1.229 -0.844

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.50571.50571.10491.10492.05672.05672.05672.0567
N21.50572.58872.11702.11701.05711.05712.73552.7355
N31.50572.58872.11702.11702.73552.73551.05711.0571
H41.10492.11702.11701.79262.41222.96202.96202.4122
H51.10492.11702.11701.79262.96202.41222.41222.9620
H62.05671.05712.73552.41222.96201.64822.96022.4589
H72.05671.05712.73552.96202.41221.64822.45892.9602
H82.05672.73551.05712.96202.41222.96022.45891.6482
H92.05672.73551.05712.41222.96202.45892.96021.6482

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 105.406 C1 N2 H7 105.406
C1 N3 H8 105.406 C1 N3 H9 105.406
N2 C1 N3 118.554 N2 C1 H4 107.381
N2 C1 H5 107.381 N3 C1 H4 107.381
N3 C1 H5 107.381 H4 C1 H5 108.436
H6 N2 H7 102.441 H8 N3 H9 102.441
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.026      
2 N -0.373      
3 N -0.373      
4 H 0.090      
5 H 0.090      
6 H 0.148      
7 H 0.148      
8 H 0.148      
9 H 0.148      


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 -2.058 2.058
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.254 0.000 0.000
y 0.000 -25.456 0.000
z 0.000 0.000 -16.184
Traceless
 xyz
x 4.566 0.000 0.000
y 0.000 -9.237 0.000
z 0.000 0.000 4.671
Polar
3z2-r29.341
x2-y29.202
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.336 0.000 0.000
y 0.000 1.881 0.000
z 0.000 0.000 2.040


<r2> (average value of r2) Å2
<r2> 54.280
(<r2>)1/2 7.367