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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: B1B95/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B1B95/3-21G*
 hartrees
Energy at 0K-150.282555
Energy at 298.15K-150.290413
HF Energy-150.282555
Nuclear repulsion energy82.488293
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 B1B95/3-21G*
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 3456 3300 3.92      
2 A1 3102 2962 39.39      
3 A1 1731 1653 35.88      
4 A1 1528 1459 3.25      
5 A1 1073 1024 57.09      
6 A1 716 684 29.38      
7 A1 440 420 1.45      
8 A2 3562 3402 0.00      
9 A2 1427 1362 0.00      
10 A2 1085 1036 0.00      
11 A2 277 264 0.00      
12 B1 3563 3402 0.78      
13 B1 3152 3009 25.79      
14 B1 1370 1308 0.14      
15 B1 831 794 0.31      
16 B1 435 415 115.25      
17 B2 3456 3300 0.82      
18 B2 1718 1640 3.42      
19 B2 1409 1345 3.59      
20 B2 1062 1014 49.34      
21 B2 563 538 596.78      

Unscaled Zero Point Vibrational Energy (zpe) 17976.8 cm-1
Scaled (by 0.9549) Zero Point Vibrational Energy (zpe) 17166.0 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 B1B95/3-21G*
ABC
1.19016 0.29354 0.26834

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.548
N2 0.000 1.269 -0.189
N3 0.000 -1.269 -0.189
H4 0.880 0.000 1.194
H5 -0.880 0.000 1.194
H6 0.837 1.402 -0.756
H7 -0.837 1.402 -0.756
H8 -0.837 -1.402 -0.756
H9 0.837 -1.402 -0.756

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46791.46791.09131.09132.09012.09012.09012.0901
N21.46792.53842.07322.07321.01971.01972.85652.8565
N31.46792.53842.07322.07322.85652.85651.01971.0197
H41.09132.07322.07321.75922.40232.95252.95252.4023
H51.09132.07322.07321.75922.95252.40232.40232.9525
H62.09011.01972.85652.40232.95251.67463.26672.8049
H72.09011.01972.85652.95252.40231.67462.80493.2667
H82.09012.85651.01972.95252.40233.26672.80491.6746
H92.09012.85651.01972.40232.95252.80493.26671.6746

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 113.088 C1 N2 H7 113.088
C1 N3 H8 113.088 C1 N3 H9 113.088
N2 C1 N3 119.681 N2 C1 H4 107.299
N2 C1 H5 107.299 N3 C1 H4 107.299
N3 C1 H5 107.299 H4 C1 H5 107.420
H6 N2 H7 110.383 H8 N3 H9 110.383
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.150      
2 N -0.696      
3 N -0.696      
4 H 0.233      
5 H 0.233      
6 H 0.269      
7 H 0.269      
8 H 0.269      
9 H 0.269      


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 -2.175 2.175
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.226 0.000 0.000
y 0.000 -24.893 0.000
z 0.000 0.000 -17.641
Traceless
 xyz
x 5.041 0.000 0.000
y 0.000 -7.960 0.000
z 0.000 0.000 2.919
Polar
3z2-r25.837
x2-y28.667
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.604 0.000 0.000
y 0.000 3.448 0.000
z 0.000 0.000 3.002


<r2> (average value of r2) Å2
<r2> 54.447
(<r2>)1/2 7.379