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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: MP2=FULL/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 MP2=FULL/6-31G
 hartrees
Energy at 0K-150.489182
Energy at 298.15K-150.497124
HF Energy-150.172822
Counterpoise corrected energy-150.489182
CP Energy at 298.15K-150.497124
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy82.079212
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 MP2=FULL/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 3537 3360 0.74      
2 A1 3101 2947 42.64      
3 A1 1753 1665 50.15      
4 A1 1547 1470 0.67      
5 A1 1087 1033 82.21      
6 A1 762 724 53.74      
7 A1 461 438 0.27      
8 A2 3662 3479 0.00      
9 A2 1427 1356 0.00      
10 A2 1082 1028 0.00      
11 A2 281 267 0.00      
12 B1 3662 3479 0.32      
13 B1 3163 3005 32.28      
14 B1 1397 1328 0.38      
15 B1 846 803 0.08      
16 B1 428 406 111.13      
17 B2 3539 3362 0.12      
18 B2 1742 1655 5.19      
19 B2 1436 1365 9.06      
20 B2 1080 1026 75.59      
21 B2 621 590 621.70      

Unscaled Zero Point Vibrational Energy (zpe) 18305.7 cm-1
Scaled (by 0.9501) Zero Point Vibrational Energy (zpe) 17392.3 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 MP2=FULL/6-31G
ABC
1.18311 0.28923 0.26477

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.551
N2 0.000 1.274 -0.196
N3 0.000 -1.274 -0.196
H4 0.885 0.000 1.198
H5 -0.885 0.000 1.198
H6 0.841 1.444 -0.740
H7 -0.841 1.444 -0.740
H8 -0.841 -1.444 -0.740
H9 0.841 -1.444 -0.740

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.47681.47681.09591.09592.11252.11252.11252.1125
N21.47682.54762.08512.08511.01661.01662.89712.8971
N31.47682.54762.08512.08512.89712.89711.01661.0166
H41.09592.08512.08511.77032.41742.97032.97032.4174
H51.09592.08512.08511.77032.97032.41742.41742.9703
H62.11251.01662.89712.41742.97031.68263.34322.8889
H72.11251.01662.89712.97032.41741.68262.88893.3432
H82.11252.89711.01662.97032.41743.34322.88891.6826
H92.11252.89711.01662.41742.97032.88893.34321.6826

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 114.570 C1 N2 H7 114.570
C1 N3 H8 114.570 C1 N3 H9 114.570
N2 C1 N3 119.206 N2 C1 H4 107.357
N2 C1 H5 107.357 N3 C1 H4 107.357
N3 C1 H5 107.357 H4 C1 H5 107.742
H6 N2 H7 111.707 H8 N3 H9 111.707
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability