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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: HF/TZVP

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/TZVP
 hartrees
Energy at 0K-150.301676
Energy at 298.15K-150.309813
HF Energy-150.301676
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy83.887647
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/TZVP
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 3720 3380 0.11      
2 A1 3209 2916 52.25      
3 A1 1806 1641 62.31      
4 A1 1618 1471 0.08      
5 A1 1161 1055 62.86      
6 A1 928 843 8.80      
7 A1 491 446 2.78      
8 A2 3804 3457 0.00      
9 A2 1517 1378 0.00      
10 A2 1147 1042 0.00      
11 A2 269 244 0.00      
12 B1 3804 3456 1.63      
13 B1 3248 2951 43.60      
14 B1 1482 1347 0.10      
15 B1 918 834 1.10      
16 B1 397 361 100.42      
17 B2 3720 3380 1.13      
18 B2 1800 1635 12.82      
19 B2 1522 1383 33.07      
20 B2 1166 1059 117.75      
21 B2 840 763 414.15      

Unscaled Zero Point Vibrational Energy (zpe) 19282.8 cm-1
Scaled (by 0.9086) Zero Point Vibrational Energy (zpe) 17520.3 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 HF/TZVP
ABC
1.19823 0.30785 0.27868

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.552
N2 0.000 1.245 -0.188
N3 0.000 -1.245 -0.188
H4 0.870 0.000 1.196
H5 -0.870 0.000 1.196
H6 0.809 1.335 -0.767
H7 -0.809 1.335 -0.767
H8 -0.809 -1.335 -0.767
H9 0.809 -1.335 -0.767

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.44871.44871.08211.08212.04422.04422.04422.0442
N21.44872.48992.05502.05500.99930.99932.76512.7651
N31.44872.48992.05502.05502.76512.76510.99930.9993
H41.08212.05502.05501.74032.37472.90802.90802.3747
H51.08212.05502.05501.74032.90802.37472.37472.9080
H62.04420.99932.76512.37472.90801.61903.12232.6698
H72.04420.99932.76512.90802.37471.61902.66983.1223
H82.04422.76510.99932.90802.37473.12232.66981.6190
H92.04422.76510.99932.37472.90802.66983.12231.6190

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 111.936 C1 N2 H7 111.936
C1 N3 H8 111.936 C1 N3 H9 111.936
N2 C1 N3 118.495 N2 C1 H4 107.698
N2 C1 H5 107.698 N3 C1 H4 107.698
N3 C1 H5 107.698 H4 C1 H5 107.042
H6 N2 H7 108.209 H8 N3 H9 108.209
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.044      
2 N -0.430      
3 N -0.430      
4 H 0.098      
5 H 0.098      
6 H 0.177      
7 H 0.177      
8 H 0.177      
9 H 0.177      


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 -1.964 1.964
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.597 0.000 0.000
y 0.000 -26.425 0.000
z 0.000 0.000 -18.258
Traceless
 xyz
x 5.745 0.000 0.000
y 0.000 -8.997 0.000
z 0.000 0.000 3.252
Polar
3z2-r26.504
x2-y29.828
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.012 0.000 0.000
y 0.000 4.211 0.000
z 0.000 0.000 3.942


<r2> (average value of r2) Å2
<r2> 53.262
(<r2>)1/2 7.298