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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: HF/CEP-121G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/CEP-121G*
 hartrees
Energy at 0K-28.333248
Energy at 298.15K-28.341394
HF Energy-28.333248
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy50.592170
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 HF/CEP-121G*
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 3710 3351 1.38      
2 A1 3234 2922 64.43      
3 A1 1842 1664 70.14      
4 A1 1624 1467 0.01      
5 A1 1178 1064 57.85      
6 A1 968 874 0.53      
7 A1 487 440 5.53      
8 A2 3793 3427 0.00      
9 A2 1517 1370 0.00      
10 A2 1145 1035 0.00      
11 A2 267 241 0.00      
12 B1 3794 3427 0.49      
13 B1 3281 2964 54.78      
14 B1 1491 1347 0.03      
15 B1 913 824 2.46      
16 B1 399 360 114.08      
17 B2 3711 3352 0.01      
18 B2 1835 1658 9.48      
19 B2 1519 1373 49.07      
20 B2 1168 1055 135.40      
21 B2 896 810 418.13      

Unscaled Zero Point Vibrational Energy (zpe) 19384.6 cm-1
Scaled (by 0.9034) Zero Point Vibrational Energy (zpe) 17512.1 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 HF/CEP-121G*
ABC
1.18239 0.30427 0.27494

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.558
N2 0.000 1.256 -0.188
N3 0.000 -1.256 -0.188
H4 0.874 0.000 1.201
H5 -0.874 0.000 1.201
H6 0.809 1.321 -0.780
H7 -0.809 1.321 -0.780
H8 -0.809 -1.321 -0.780
H9 0.809 -1.321 -0.780

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46121.46121.08461.08462.04722.04722.04722.0472
N21.46122.51232.06682.06681.00411.00412.76552.7655
N31.46122.51232.06682.06682.76552.76551.00411.0041
H41.08462.06682.06681.74712.38242.91572.91572.3824
H51.08462.06682.06681.74712.91572.38242.38242.9157
H62.04721.00412.76552.38242.91571.61723.09852.6430
H72.04721.00412.76552.91572.38241.61722.64303.0985
H82.04722.76551.00412.91572.38243.09852.64301.6172
H92.04722.76551.00412.38242.91572.64303.09851.6172

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.918 C1 N2 H7 110.918
C1 N3 H8 110.918 C1 N3 H9 110.918
N2 C1 N3 118.551 N2 C1 H4 107.629
N2 C1 H5 107.629 N3 C1 H4 107.629
N3 C1 H5 107.629 H4 C1 H5 107.292
H6 N2 H7 107.275 H8 N3 H9 107.275
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.133      
2 N -0.717      
3 N -0.717      
4 H 0.170      
5 H 0.170      
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 -2.101 2.101
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.532 0.000 0.000
y 0.000 -27.025 0.000
z 0.000 0.000 -18.074
Traceless
 xyz
x 6.018 0.000 0.000
y 0.000 -9.722 0.000
z 0.000 0.000 3.704
Polar
3z2-r27.408
x2-y210.493
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.968 0.000 0.000
y 0.000 3.951 0.000
z 0.000 0.000 3.807


<r2> (average value of r2) Å2
<r2> 46.657
(<r2>)1/2 6.831