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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: B3LYP/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 B3LYP/3-21G*
 hartrees
Energy at 0K-150.365319
Energy at 298.15K-150.373191
HF Energy-150.365319
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy82.010087
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 B3LYP/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 3384 3256 9.29      
2 A1 3077 2960 39.56      
3 A1 1727 1662 29.34      
4 A1 1528 1469 1.84      
5 A1 1059 1019 50.70      
6 A1 726 698 13.73      
7 A1 439 422 3.53      
8 A2 3483 3350 0.00      
9 A2 1425 1371 0.00      
10 A2 1088 1046 0.00      
11 A2 278 267 0.00      
12 B1 3484 3351 5.31      
13 B1 3122 3004 26.57      
14 B1 1372 1320 0.51      
15 B1 834 802 0.04      
16 B1 432 415 113.29      
17 B2 3384 3255 1.79      
18 B2 1714 1649 1.41      
19 B2 1409 1355 5.19      
20 B2 1030 991 33.08      
21 B2 593 571 580.38      

Unscaled Zero Point Vibrational Energy (zpe) 17792.2 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 17116.1 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 B3LYP/3-21G*
ABC
1.17545 0.29008 0.26485

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.554
N2 0.000 1.280 -0.189
N3 0.000 -1.280 -0.189
H4 0.884 0.000 1.198
H5 -0.884 0.000 1.198
H6 0.838 1.393 -0.769
H7 -0.838 1.393 -0.769
H8 -0.838 -1.393 -0.769
H9 0.838 -1.393 -0.769

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.47971.47971.09331.09332.09572.09572.09572.0957
N21.47972.56002.08352.08351.02531.02532.86112.8611
N31.47972.56002.08352.08352.86112.86111.02531.0253
H41.09332.08352.08351.76702.41042.96162.96162.4104
H51.09332.08352.08351.76702.96162.41042.41042.9616
H62.09571.02532.86112.41042.96161.67563.25192.7869
H72.09571.02532.86112.96162.41041.67562.78693.2519
H82.09572.86111.02532.96162.41043.25192.78691.6756
H92.09572.86111.02532.41042.96162.78693.25191.6756

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 112.306 C1 N2 H7 112.306
C1 N3 H8 112.306 C1 N3 H9 112.306
N2 C1 N3 119.776 N2 C1 H4 107.188
N2 C1 H5 107.188 N3 C1 H4 107.188
N3 C1 H5 107.188 H4 C1 H5 107.824
H6 N2 H7 109.606 H8 N3 H9 109.606
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.121      
2 N -0.656      
3 N -0.656      
4 H 0.213      
5 H 0.213      
6 H 0.252      
7 H 0.252      
8 H 0.252      
9 H 0.252      


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 -2.156 2.156
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.476 0.000 0.000
y 0.000 -25.250 0.000
z 0.000 0.000 -17.716
Traceless
 xyz
x 5.007 0.000 0.000
y 0.000 -8.154 0.000
z 0.000 0.000 3.148
Polar
3z2-r26.295
x2-y28.774
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.671 0.000 0.000
y 0.000 3.532 0.000
z 0.000 0.000 3.084


<r2> (average value of r2) Å2
<r2> 55.018
(<r2>)1/2 7.417