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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: HF/SDD

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/SDD
 hartrees
Energy at 0K-150.205568
Energy at 298.15K 
HF Energy-150.205568
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy83.070356
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/SDD
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 3792 3415 0.90      
2 A1 3267 2942 72.15      
3 A1 1837 1654 62.17      
4 A1 1638 1475 2.36      
5 A1 1131 1018 96.64      
6 A1 732 659 159.09      
7 A1 476 429 11.85      
8 A2 3921 3531 0.00      
9 A2 1507 1357 0.00      
10 A2 1115 1004 0.00      
11 A2 209 188 0.00      
12 B1 3922 3531 9.33      
13 B1 3325 2994 54.14      
14 B1 1454 1309 3.22      
15 B1 902 812 1.40      
16 B1 374 337 95.44      
17 B2 3794 3416 1.06      
18 B2 1829 1647 34.51      
19 B2 1525 1373 13.75      
20 B2 1175 1058 166.31      
21 B2 521 469 608.04      

Unscaled Zero Point Vibrational Energy (zpe) 19221.5 cm-1
Scaled (by 0.9004) Zero Point Vibrational Energy (zpe) 17307.0 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/SDD
See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/SDD

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.548
N2 0.000 1.251 -0.204
N3 0.000 -1.251 -0.204
H4 0.870 0.000 1.189
H5 -0.870 0.000 1.189
H6 0.834 1.478 -0.701
H7 -0.834 1.478 -0.701
H8 -0.834 -1.478 -0.701
H9 0.834 -1.478 -0.701

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45991.45991.08011.08012.10792.10792.10792.1079
N21.45992.50202.06452.06450.99750.99752.89702.8970
N31.45992.50202.06452.06452.89702.89700.99750.9975
H41.08012.06452.06451.73942.39992.94312.94312.3999
H51.08012.06452.06451.73942.94312.39992.39992.9431
H62.10790.99752.89702.39992.94311.66893.39512.9566
H72.10790.99752.89702.94312.39991.66892.95663.3951
H82.10792.89700.99752.94312.39993.39512.95661.6689
H92.10792.89700.99752.39992.94312.95663.39511.6689

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 116.879 C1 N2 H7 116.879
C1 N3 H8 116.879 C1 N3 H9 116.879
N2 C1 N3 117.943 N2 C1 H4 107.800
N2 C1 H5 107.800 N3 C1 H4 107.800
N3 C1 H5 107.800 H4 C1 H5 107.251
H6 N2 H7 113.549 H8 N3 H9 113.549
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.128      
2 N -0.732      
3 N -0.732      
4 H 0.192      
5 H 0.192      
6 H 0.302      
7 H 0.302      
8 H 0.302      
9 H 0.302      


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 -1.949 1.949
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.147 0.000 0.000
y 0.000 -25.007 0.000
z 0.000 0.000 -18.848
Traceless
 xyz
x 5.780 0.000 0.000
y 0.000 -7.509 0.000
z 0.000 0.000 1.729
Polar
3z2-r23.459
x2-y28.860
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.644 0.000 0.000
y 0.000 3.407 0.000
z 0.000 0.000 3.025


<r2> (average value of r2) Å2
<r2> 54.624
(<r2>)1/2 7.391