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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-151.179397
Energy at 298.15K-151.187431
HF Energy-151.179397
Nuclear repulsion energy83.330319
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 3536 3364 1.34      
2 A1 3088 2939 43.18      
3 A1 1685 1603 42.24      
4 A1 1501 1428 0.41      
5 A1 1118 1064 38.69      
6 A1 874 831 2.53      
7 A1 462 440 5.17      
8 A2 3631 3455 0.00      
9 A2 1413 1344 0.00      
10 A2 1081 1028 0.00      
11 A2 274 261 0.00      
12 B1 3629 3453 0.01      
13 B1 3138 2985 28.66      
14 B1 1382 1315 0.23      
15 B1 854 812 0.13      
16 B1 414 394 103.18      
17 B2 3537 3365 0.12      
18 B2 1676 1594 3.53      
19 B2 1403 1335 20.80      
20 B2 1111 1057 77.48      
21 B2 787 749 444.02      

Unscaled Zero Point Vibrational Energy (zpe) 18296.2 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 17408.9 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
1.19353 0.30343 0.27530

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 0.547
N2 0.000 1.258 -0.182
N3 0.000 -1.258 -0.182
H4 0.877 0.000 1.201
H5 -0.877 0.000 1.201
H6 0.814 1.319 -0.784
H7 -0.814 1.319 -0.784
H8 -0.814 -1.319 -0.784
H9 0.814 -1.319 -0.784

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45421.45421.09391.09392.04342.04342.04342.0434
N21.45422.51602.06532.06531.01451.01452.76872.7687
N31.45422.51602.06532.06532.76872.76871.01451.0145
H41.09392.06532.06531.75412.38432.92262.92262.3843
H51.09392.06532.06531.75412.92262.38432.38432.9226
H62.04341.01452.76872.38432.92261.62853.10002.6377
H72.04341.01452.76872.92262.38431.62852.63773.1000
H82.04342.76871.01452.92262.38433.10002.63771.6285
H92.04342.76871.01452.38432.92262.63773.10001.6285

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.464 C1 N2 H7 110.464
C1 N3 H8 110.464 C1 N3 H9 110.464
N2 C1 N3 119.777 N2 C1 H4 107.447
N2 C1 H5 107.447 N3 C1 H4 107.447
N3 C1 H5 107.447 H4 C1 H5 106.598
H6 N2 H7 106.767 H8 N3 H9 106.767
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 -0.036      
2 N -0.622      
3 N -0.622      
4 H 0.146      
5 H 0.146      
6 H 0.247      
7 H 0.247      
8 H 0.247      
9 H 0.247      


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 -2.058 2.058
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.577 0.000 0.000
y 0.000 -25.696 0.000
z 0.000 0.000 -17.706
Traceless
 xyz
x 5.124 0.000 0.000
y 0.000 -8.554 0.000
z 0.000 0.000 3.430
Polar
3z2-r26.861
x2-y29.119
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.921 0.000 0.000
y 0.000 3.906 0.000
z 0.000 0.000 3.677


<r2> (average value of r2) Å2
<r2> 53.399
(<r2>)1/2 7.307