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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-151.021086
Energy at 298.15K-151.029047
HF Energy-151.021086
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy82.552314
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 3389 3343 6.84      
2 A1 2992 2951 40.23      
3 A1 1628 1606 32.13      
4 A1 1444 1424 0.26      
5 A1 1084 1069 26.70      
6 A1 838 827 0.11      
7 A1 442 436 6.19      
8 A2 3483 3435 0.00      
9 A2 1363 1344 0.00      
10 A2 1051 1037 0.00      
11 A2 273 269 0.00      
12 B1 3480 3433 2.38      
13 B1 3040 2999 26.45      
14 B1 1337 1319 0.75      
15 B1 826 815 0.10      
16 B1 413 407 96.46      
17 B2 3390 3343 0.34      
18 B2 1617 1595 0.76      
19 B2 1349 1330 19.51      
20 B2 1052 1038 52.66      
21 B2 771 761 443.10      

Unscaled Zero Point Vibrational Energy (zpe) 17631.0 cm-1
Scaled (by 0.9863) Zero Point Vibrational Energy (zpe) 17389.5 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 PBEPBE/6-31G**
ABC
1.17892 0.29709 0.26983

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 1.274 -0.180
N3 0.000 -1.274 -0.180
H4 0.886 0.000 1.208
H5 -0.886 0.000 1.208
H6 0.819 1.315 -0.798
H7 -0.819 1.315 -0.798
H8 -0.819 -1.315 -0.798
H9 0.819 -1.315 -0.798

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46811.46811.10381.10382.05292.05292.05292.0529
N21.46812.54882.08182.08181.02641.02642.78552.7855
N31.46812.54882.08182.08182.78552.78551.02641.0264
H41.10382.08182.08181.77172.39942.94232.94232.3994
H51.10382.08182.08181.77172.94232.39942.39942.9423
H62.05291.02642.78552.39942.94231.63713.09872.6309
H72.05291.02642.78552.94232.39941.63712.63093.0987
H82.05292.78551.02642.94232.39943.09872.63091.6371
H92.05292.78551.02642.39942.94232.63093.09871.6371

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 109.491 C1 N2 H7 109.491
C1 N3 H8 109.491 C1 N3 H9 109.491
N2 C1 N3 120.462 N2 C1 H4 107.232
N2 C1 H5 107.232 N3 C1 H4 107.232
N3 C1 H5 107.232 H4 C1 H5 106.739
H6 N2 H7 105.777 H8 N3 H9 105.777
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 -0.053      
2 N -0.564      
3 N -0.564      
4 H 0.133      
5 H 0.133      
6 H 0.229      
7 H 0.229      
8 H 0.229      
9 H 0.229      


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 -2.030 2.030
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.902 0.000 0.000
y 0.000 -25.819 0.000
z 0.000 0.000 -17.888
Traceless
 xyz
x 4.952 0.000 0.000
y 0.000 -8.425 0.000
z 0.000 0.000 3.473
Polar
3z2-r26.946
x2-y28.918
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.102 0.000 0.000
y 0.000 4.217 0.000
z 0.000 0.000 3.880


<r2> (average value of r2) Å2
<r2> 54.251
(<r2>)1/2 7.366