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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: B3LYP/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 B3LYP/6-31G*
 hartrees
Energy at 0K-151.202474
Energy at 298.15K-151.210502
HF Energy-151.202474
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy82.884182
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/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 3453 3316 4.73      
2 A1 3072 2950 43.37      
3 A1 1706 1638 38.73      
4 A1 1512 1452 0.09      
5 A1 1116 1071 35.25      
6 A1 877 842 0.16      
7 A1 456 438 6.21      
8 A2 3541 3400 0.00      
9 A2 1417 1360 0.00      
10 A2 1087 1044 0.00      
11 A2 277 266 0.00      
12 B1 3539 3399 2.53      
13 B1 3116 2992 31.33      
14 B1 1389 1334 0.41      
15 B1 856 822 0.39      
16 B1 413 397 103.63      
17 B2 3453 3316 0.36      
18 B2 1695 1628 1.35      
19 B2 1410 1354 24.53      
20 B2 1077 1035 63.57      
21 B2 814 782 451.92      

Unscaled Zero Point Vibrational Energy (zpe) 18136.8 cm-1
Scaled (by 0.9603) Zero Point Vibrational Energy (zpe) 17416.8 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/6-31G*
ABC
1.18156 0.29994 0.27202

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.552
N2 0.000 1.267 -0.182
N3 0.000 -1.267 -0.182
H4 0.881 0.000 1.203
H5 -0.881 0.000 1.203
H6 0.816 1.319 -0.791
H7 -0.816 1.319 -0.791
H8 -0.816 -1.319 -0.791
H9 0.816 -1.319 -0.791

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46421.46421.09541.09542.05212.05212.05212.0521
N21.46422.53352.07362.07361.01981.01982.77922.7792
N31.46422.53352.07362.07362.77922.77921.01981.0198
H41.09542.07362.07361.76182.39212.93232.93232.3921
H51.09542.07362.07361.76182.93232.39212.39212.9323
H62.05211.01982.77922.39212.93231.63243.10252.6383
H72.05211.01982.77922.93232.39211.63242.63833.1025
H82.05212.77921.01982.93232.39213.10252.63831.6324
H92.05212.77921.01982.39212.93232.63833.10251.6324

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.123 C1 N2 H7 110.123
C1 N3 H8 110.123 C1 N3 H9 110.123
N2 C1 N3 119.797 N2 C1 H4 107.344
N2 C1 H5 107.344 N3 C1 H4 107.344
N3 C1 H5 107.344 H4 C1 H5 107.063
H6 N2 H7 106.337 H8 N3 H9 106.337
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.066      
2 N -0.691      
3 N -0.691      
4 H 0.155      
5 H 0.155      
6 H 0.284      
7 H 0.284      
8 H 0.284      
9 H 0.284      


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 -2.069 2.069
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.769 0.000 0.000
y 0.000 -26.075 0.000
z 0.000 0.000 -17.860
Traceless
 xyz
x 5.199 0.000 0.000
y 0.000 -8.761 0.000
z 0.000 0.000 3.561
Polar
3z2-r27.123
x2-y29.306
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.937 0.000 0.000
y 0.000 3.913 0.000
z 0.000 0.000 3.670


<r2> (average value of r2) Å2
<r2> 53.974
(<r2>)1/2 7.347