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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: mPW1PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/3-21G*
 hartrees
Energy at 0K-150.329251
Energy at 298.15K-150.337136
HF Energy-150.329251
Nuclear repulsion energy82.378555
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 mPW1PW91/3-21G*
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 3455 3281 3.63      
2 A1 3098 2942 39.16      
3 A1 1736 1648 36.69      
4 A1 1531 1454 3.57      
5 A1 1075 1021 57.48      
6 A1 723 687 27.57      
7 A1 445 422 1.67      
8 A2 3560 3380 0.00      
9 A2 1432 1360 0.00      
10 A2 1090 1035 0.00      
11 A2 282 267 0.00      
12 B1 3561 3381 0.52      
13 B1 3148 2990 25.47      
14 B1 1376 1306 0.13      
15 B1 836 794 0.38      
16 B1 438 416 116.53      
17 B2 3455 3281 0.77      
18 B2 1722 1635 3.31      
19 B2 1414 1343 3.25      
20 B2 1064 1010 45.99      
21 B2 575 546 599.60      

Unscaled Zero Point Vibrational Energy (zpe) 18006.5 cm-1
Scaled (by 0.9496) Zero Point Vibrational Energy (zpe) 17099.0 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 mPW1PW91/3-21G*
ABC
1.18821 0.29262 0.26754

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.548
N2 0.000 1.272 -0.189
N3 0.000 -1.272 -0.189
H4 0.881 0.000 1.195
H5 -0.881 0.000 1.195
H6 0.838 1.402 -0.758
H7 -0.838 1.402 -0.758
H8 -0.838 -1.402 -0.758
H9 0.838 -1.402 -0.758

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46991.46991.09301.09302.09152.09152.09152.0915
N21.46992.54332.07592.07591.02111.02112.85932.8593
N31.46992.54332.07592.07592.85932.85931.02111.0211
H41.09302.07592.07591.76182.40492.95562.95562.4049
H51.09302.07592.07591.76182.95562.40492.40492.9556
H62.09151.02112.85932.40492.95561.67563.26712.8047
H72.09151.02112.85932.95562.40491.67562.80473.2671
H82.09152.85931.02112.95562.40493.26712.80471.6756
H92.09152.85931.02112.40492.95562.80473.26711.6756

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 112.966 C1 N2 H7 112.966
C1 N3 H8 112.966 C1 N3 H9 112.966
N2 C1 N3 119.793 N2 C1 H4 107.273
N2 C1 H5 107.273 N3 C1 H4 107.273
N3 C1 H5 107.273 H4 C1 H5 107.402
H6 N2 H7 110.269 H8 N3 H9 110.269
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.160      
2 N -0.705      
3 N -0.705      
4 H 0.239      
5 H 0.239      
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 -2.195 2.195
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.222 0.000 0.000
y 0.000 -25.004 0.000
z 0.000 0.000 -17.634
Traceless
 xyz
x 5.097 0.000 0.000
y 0.000 -8.076 0.000
z 0.000 0.000 2.979
Polar
3z2-r25.959
x2-y28.782
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.589 0.000 0.000
y 0.000 3.447 0.000
z 0.000 0.000 2.996


<r2> (average value of r2) Å2
<r2> 54.578
(<r2>)1/2 7.388