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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: PBEPBE/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 PBEPBE/6-31G*
 hartrees
Energy at 0K-151.005955
Energy at 298.15K-151.013936
HF Energy-151.005955
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy82.495917
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 PBEPBE/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 3362 3313 8.29      
2 A1 3000 2957 39.95      
3 A1 1658 1635 35.26      
4 A1 1459 1438 0.41      
5 A1 1096 1080 26.51      
6 A1 853 840 0.00      
7 A1 442 436 6.64      
8 A2 3454 3405 0.00      
9 A2 1375 1355 0.00      
10 A2 1062 1046 0.00      
11 A2 278 274 0.00      
12 B1 3453 3403 3.75      
13 B1 3047 3003 27.25      
14 B1 1352 1332 0.88      
15 B1 831 819 0.15      
16 B1 416 410 101.68      
17 B2 3362 3314 0.56      
18 B2 1647 1623 0.31      
19 B2 1360 1341 21.01      
20 B2 1056 1041 50.54      
21 B2 793 781 455.14      

Unscaled Zero Point Vibrational Energy (zpe) 17676.5 cm-1
Scaled (by 0.9857) Zero Point Vibrational Energy (zpe) 17423.8 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 PBEPBE/6-31G*
ABC
1.17754 0.29674 0.26957

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.549
N2 0.000 1.275 -0.180
N3 0.000 -1.275 -0.180
H4 0.887 0.000 1.207
H5 -0.887 0.000 1.207
H6 0.820 1.315 -0.799
H7 -0.820 1.315 -0.799
H8 -0.820 -1.315 -0.799
H9 0.820 -1.315 -0.799

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46881.46881.10421.10422.05422.05422.05422.0542
N21.46882.55042.08222.08221.02821.02822.78672.7867
N31.46882.55042.08222.08222.78672.78671.02821.0282
H41.10422.08222.08221.77422.39962.94392.94392.3996
H51.10422.08222.08221.77422.94392.39962.39962.9439
H62.05421.02822.78672.39962.94391.63943.09962.6305
H72.05421.02822.78672.94392.39961.63942.63053.0996
H82.05422.78671.02822.94392.39963.09962.63051.6394
H92.05422.78671.02822.39962.94392.63053.09961.6394

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 109.438 C1 N2 H7 109.438
C1 N3 H8 109.438 C1 N3 H9 109.438
N2 C1 N3 120.492 N2 C1 H4 107.189
N2 C1 H5 107.189 N3 C1 H4 107.189
N3 C1 H5 107.189 H4 C1 H5 106.905
H6 N2 H7 105.737 H8 N3 H9 105.737
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.135      
2 N -0.670      
3 N -0.670      
4 H 0.169      
5 H 0.169      
6 H 0.284      
7 H 0.284      
8 H 0.284      
9 H 0.284      


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 -2.094 2.094
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.849 0.000 0.000
y 0.000 -26.107 0.000
z 0.000 0.000 -17.892
Traceless
 xyz
x 5.150 0.000 0.000
y 0.000 -8.736 0.000
z 0.000 0.000 3.586
Polar
3z2-r27.172
x2-y29.258
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.045 0.000 0.000
y 0.000 4.163 0.000
z 0.000 0.000 3.811


<r2> (average value of r2) Å2
<r2> 54.344
(<r2>)1/2 7.372