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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: mPW1PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/6-31G*
 hartrees
Energy at 0K-151.163972
Energy at 298.15K-151.172025
HF Energy-151.163972
Nuclear repulsion energy83.274767
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 mPW1PW91/6-31G*
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 3511 3330 1.89      
2 A1 3100 2939 42.53      
3 A1 1716 1627 45.72      
4 A1 1516 1438 0.56      
5 A1 1130 1072 38.77      
6 A1 891 845 1.26      
7 A1 463 439 5.83      
8 A2 3605 3419 0.00      
9 A2 1424 1351 0.00      
10 A2 1092 1035 0.00      
11 A2 278 264 0.00      
12 B1 3604 3417 0.22      
13 B1 3148 2986 29.36      
14 B1 1397 1325 0.32      
15 B1 858 814 0.22      
16 B1 418 396 109.14      
17 B2 3512 3331 0.27      
18 B2 1706 1618 2.30      
19 B2 1414 1341 22.74      
20 B2 1115 1057 75.92      
21 B2 812 770 454.83      

Unscaled Zero Point Vibrational Energy (zpe) 18354.6 cm-1
Scaled (by 0.9483) Zero Point Vibrational Energy (zpe) 17405.7 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 mPW1PW91/6-31G*
ABC
1.19175 0.30314 0.27502

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.548
N2 0.000 1.259 -0.182
N3 0.000 -1.259 -0.182
H4 0.878 0.000 1.201
H5 -0.878 0.000 1.201
H6 0.815 1.317 -0.786
H7 -0.815 1.317 -0.786
H8 -0.815 -1.317 -0.786
H9 0.815 -1.317 -0.786

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45521.45521.09401.09402.04412.04412.04412.0441
N21.45522.51792.06572.06571.01611.01612.76842.7684
N31.45522.51792.06572.06572.76842.76841.01611.0161
H41.09402.06572.06571.75612.38452.92362.92362.3845
H51.09402.06572.06571.75612.92362.38452.38452.9236
H62.04411.01612.76842.38452.92361.62953.09712.6338
H72.04411.01612.76842.92362.38451.62952.63383.0971
H82.04412.76841.01612.92362.38453.09712.63381.6295
H92.04412.76841.01612.38452.92362.63383.09711.6295

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.343 C1 N2 H7 110.343
C1 N3 H8 110.343 C1 N3 H9 110.343
N2 C1 N3 119.799 N2 C1 H4 107.408
N2 C1 H5 107.408 N3 C1 H4 107.408
N3 C1 H5 107.408 H4 C1 H5 106.757
H6 N2 H7 106.611 H8 N3 H9 106.611
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.121      
2 N -0.735      
3 N -0.735      
4 H 0.184      
5 H 0.184      
6 H 0.306      
7 H 0.306      
8 H 0.306      
9 H 0.306      


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 -2.122 2.122
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.543 0.000 0.000
y 0.000 -26.017 0.000
z 0.000 0.000 -17.708
Traceless
 xyz
x 5.320 0.000 0.000
y 0.000 -8.892 0.000
z 0.000 0.000 3.572
Polar
3z2-r27.145
x2-y29.474
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.860 0.000 0.000
y 0.000 3.845 0.000
z 0.000 0.000 3.608


<r2> (average value of r2) Å2
<r2> 53.492
(<r2>)1/2 7.314