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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: MP2/CEP-121G*

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/CEP-121G*
 hartrees
Energy at 0K-28.803376
Energy at 298.15K-28.811443
HF Energy-28.331766
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy50.064883
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/CEP-121G*
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 3492 3327 2.28      
2 A1 3111 2965 39.41      
3 A1 1724 1642 71.78      
4 A1 1519 1448 0.43      
5 A1 1133 1079 36.83      
6 A1 903 860 0.00      
7 A1 458 436 6.44      
8 A2 3601 3431 0.00      
9 A2 1412 1345 0.00      
10 A2 1086 1034 0.00      
11 A2 274 261 0.00      
12 B1 3598 3428 0.05      
13 B1 3179 3029 29.94      
14 B1 1402 1336 0.64      
15 B1 860 820 1.73      
16 B1 413 394 111.39      
17 B2 3493 3328 0.54      
18 B2 1712 1631 2.57      
19 B2 1413 1346 31.16      
20 B2 1096 1044 84.04      
21 B2 855 814 468.20      

Unscaled Zero Point Vibrational Energy (zpe) 18365.8 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 17499.0 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 MP2/CEP-121G*
ABC
1.16846 0.29701 0.26929

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.559
N2 0.000 1.274 -0.185
N3 0.000 -1.274 -0.185
H4 0.885 0.000 1.202
H5 -0.885 0.000 1.202
H6 0.821 1.318 -0.791
H7 -0.821 1.318 -0.791
H8 -0.821 -1.318 -0.791
H9 0.821 -1.318 -0.791

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.47551.47551.09391.09392.05762.05762.05762.0576
N21.47552.54822.08112.08111.02111.02112.78562.7856
N31.47552.54822.08112.08112.78562.78561.02111.0211
H41.09392.08112.08111.76952.39072.93592.93592.3907
H51.09392.08112.08111.76952.93592.39072.39072.9359
H62.05761.02112.78562.39072.93591.64113.10512.6360
H72.05761.02112.78562.93592.39071.64112.63603.1051
H82.05762.78561.02112.93592.39073.10512.63601.6411
H92.05762.78561.02112.39072.93592.63603.10511.6411

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 109.663 C1 N2 H7 109.663
C1 N3 H8 109.663 C1 N3 H9 109.663
N2 C1 N3 119.424 N2 C1 H4 107.252
N2 C1 H5 107.252 N3 C1 H4 107.252
N3 C1 H5 107.252 H4 C1 H5 107.964
H6 N2 H7 106.955 H8 N3 H9 106.955
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability