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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: PBE1PBE/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 PBE1PBE/6-31G*
 hartrees
Energy at 0K-151.022632
Energy at 298.15K-151.030687
HF Energy-151.022632
Nuclear repulsion energy83.274544
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 PBE1PBE/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 3506 3332 1.91      
2 A1 3094 2941 41.27      
3 A1 1712 1626 45.67      
4 A1 1510 1435 0.59      
5 A1 1131 1075 37.25      
6 A1 893 848 1.12      
7 A1 462 439 5.97      
8 A2 3601 3422 0.00      
9 A2 1420 1350 0.00      
10 A2 1090 1035 0.00      
11 A2 279 265 0.00      
12 B1 3599 3420 0.18      
13 B1 3143 2987 28.16      
14 B1 1395 1325 0.39      
15 B1 857 814 0.22      
16 B1 419 398 109.34      
17 B2 3507 3333 0.21      
18 B2 1702 1617 2.22      
19 B2 1409 1339 22.82      
20 B2 1120 1064 75.71      
21 B2 812 772 453.16      

Unscaled Zero Point Vibrational Energy (zpe) 18329.3 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 17418.3 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 PBE1PBE/6-31G*
ABC
1.19091 0.30340 0.27525

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/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 -0.181
N3 0.000 -1.259 -0.181
H4 0.879 0.000 1.202
H5 -0.879 0.000 1.202
H6 0.815 1.314 -0.787
H7 -0.815 1.314 -0.787
H8 -0.815 -1.314 -0.787
H9 0.815 -1.314 -0.787

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45461.45461.09551.09552.04302.04302.04302.0430
N21.45462.51722.06632.06631.01721.01722.76602.7660
N31.45462.51722.06632.06632.76602.76601.01721.0172
H41.09552.06632.06631.75792.38472.92452.92452.3847
H51.09552.06632.06631.75792.92452.38472.38472.9245
H62.04301.01722.76602.38472.92451.63033.09292.6284
H72.04301.01722.76602.92452.38471.63032.62843.0929
H82.04302.76601.01722.92452.38473.09292.62841.6303
H92.04302.76601.01722.38472.92452.62843.09291.6303

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.236 C1 N2 H7 110.236
C1 N3 H8 110.236 C1 N3 H9 110.236
N2 C1 N3 119.827 N2 C1 H4 107.410
N2 C1 H5 107.410 N3 C1 H4 107.410
N3 C1 H5 107.410 H4 C1 H5 106.708
H6 N2 H7 106.526 H8 N3 H9 106.526
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.127      
2 N -0.732      
3 N -0.732      
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 -2.125 2.125
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.601 0.000 0.000
y 0.000 -26.083 0.000
z 0.000 0.000 -17.760
Traceless
 xyz
x 5.320 0.000 0.000
y 0.000 -8.902 0.000
z 0.000 0.000 3.582
Polar
3z2-r27.164
x2-y29.482
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.880 0.000 0.000
y 0.000 3.859 0.000
z 0.000 0.000 3.631


<r2> (average value of r2) Å2
<r2> 53.501
(<r2>)1/2 7.314