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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: MP2/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/6-31G(2df,p)
 hartrees
Energy at 0K-150.834499
Energy at 298.15K-150.842566
HF Energy-150.262881
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy83.314757
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 MP2/6-31G(2df,p)
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 3549 3352 0.10      
2 A1 3129 2955 30.81      
3 A1 1687 1593 41.58      
4 A1 1524 1439 0.10      
5 A1 1142 1078 30.83      
6 A1 890 840 0.01      
7 A1 462 436 5.48      
8 A2 3650 3447 0.00      
9 A2 1422 1343 0.00      
10 A2 1086 1026 0.00      
11 A2 277 262 0.00      
12 B1 3647 3444 3.04      
13 B1 3189 3012 18.31      
14 B1 1391 1314 0.41      
15 B1 864 816 0.41      
16 B1 404 381 92.01      
17 B2 3550 3353 0.41      
18 B2 1676 1583 2.21      
19 B2 1407 1329 18.52      
20 B2 1122 1059 54.65      
21 B2 838 791 400.74      

Unscaled Zero Point Vibrational Energy (zpe) 18451.6 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 17427.6 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 MP2/6-31G(2df,p)
ABC
1.18025 0.30491 0.27558

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.555
N2 0.000 1.258 -0.183
N3 0.000 -1.258 -0.183
H4 0.879 0.000 1.203
H5 -0.879 0.000 1.203
H6 0.810 1.293 -0.793
H7 -0.810 1.293 -0.793
H8 -0.810 -1.293 -0.793
H9 0.810 -1.293 -0.793

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45921.45921.09151.09152.03612.03612.03612.0361
N21.45922.51692.06822.06821.01441.01442.74512.7451
N31.45922.51692.06822.06822.74512.74511.01441.0144
H41.09152.06822.06821.75722.37932.91672.91672.3793
H51.09152.06822.06821.75722.91672.37932.37932.9167
H62.03611.01442.74512.37932.91671.61953.05062.5853
H72.03611.01442.74512.91672.37931.61952.58533.0506
H82.03612.74511.01442.91672.37933.05062.58531.6195
H92.03612.74511.01442.37932.91672.58533.05061.6195

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 109.482 C1 N2 H7 109.482
C1 N3 H8 109.482 C1 N3 H9 109.482
N2 C1 N3 119.179 N2 C1 H4 107.479
N2 C1 H5 107.479 N3 C1 H4 107.479
N3 C1 H5 107.479 H4 C1 H5 107.209
H6 N2 H7 105.922 H8 N3 H9 105.922
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability