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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: PBE1PBE/3-21G

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/3-21G
 hartrees
Energy at 0K-150.187753
Energy at 298.15K-150.195651
HF Energy-150.187753
Nuclear repulsion energy82.362736
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/3-21G
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 3444 3308 4.06      
2 A1 3092 2969 38.26      
3 A1 1731 1663 36.68      
4 A1 1525 1465 3.62      
5 A1 1077 1035 55.22      
6 A1 725 696 25.20      
7 A1 444 426 1.95      
8 A2 3550 3410 0.00      
9 A2 1428 1372 0.00      
10 A2 1088 1045 0.00      
11 A2 283 272 0.00      
12 B1 3551 3410 0.64      
13 B1 3142 3018 24.58      
14 B1 1374 1319 0.22      
15 B1 834 801 0.33      
16 B1 439 421 117.69      
17 B2 3444 3308 0.76      
18 B2 1718 1650 3.13      
19 B2 1408 1353 3.06      
20 B2 1068 1026 44.88      
21 B2 577 554 598.79      

Unscaled Zero Point Vibrational Energy (zpe) 17971.1 cm-1
Scaled (by 0.9604) Zero Point Vibrational Energy (zpe) 17259.4 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 PBE1PBE/3-21G
ABC
1.18595 0.29289 0.26771

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.548
N2 0.000 1.271 -0.189
N3 0.000 -1.271 -0.189
H4 0.882 0.000 1.197
H5 -0.882 0.000 1.197
H6 0.838 1.398 -0.760
H7 -0.838 1.398 -0.760
H8 -0.838 -1.398 -0.760
H9 0.838 -1.398 -0.760

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46971.46971.09451.09452.09062.09062.09062.0906
N21.46972.54282.07692.07691.02251.02252.85612.8561
N31.46972.54282.07692.07692.85612.85611.02251.0225
H41.09452.07692.07691.76392.40552.95702.95702.4055
H51.09452.07692.07691.76392.95702.40552.40552.9570
H62.09061.02252.85612.40552.95701.67673.26092.7968
H72.09061.02252.85612.95702.40551.67672.79683.2609
H82.09062.85611.02252.95702.40553.26092.79681.6767
H92.09062.85611.02252.40552.95702.79683.26091.6767

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 112.814 C1 N2 H7 112.814
C1 N3 H8 112.814 C1 N3 H9 112.814
N2 C1 N3 119.790 N2 C1 H4 107.280
N2 C1 H5 107.280 N3 C1 H4 107.280
N3 C1 H5 107.280 H4 C1 H5 107.373
H6 N2 H7 110.152 H8 N3 H9 110.152
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.165      
2 N -0.704      
3 N -0.704      
4 H 0.240      
5 H 0.240      
6 H 0.273      
7 H 0.273      
8 H 0.273      
9 H 0.273      


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 -2.203 2.203
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.281 0.000 0.000
y 0.000 -25.115 0.000
z 0.000 0.000 -17.673
Traceless
 xyz
x 5.113 0.000 0.000
y 0.000 -8.139 0.000
z 0.000 0.000 3.025
Polar
3z2-r26.051
x2-y28.834
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.612 0.000 0.000
y 0.000 3.460 0.000
z 0.000 0.000 3.022


<r2> (average value of r2) Å2
<r2> 54.596
(<r2>)1/2 7.389