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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: QCISD/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD/aug-cc-pVDZ
 hartrees
Energy at 0K-150.829126
Energy at 298.15K-150.837103
HF Energy-150.271821
Counterpoise corrected energy-150.829126
CP Energy at 298.15K-150.837103
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy82.638856
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 QCISD/aug-cc-pVDZ
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 3485 3376 1.88      
2 A1 3071 2974 33.51      
3 A1 1662 1610 39.17      
4 A1 1488 1441 0.07      
5 A1 1104 1069 32.90      
6 A1 864 837 1.17      
7 A1 452 437 2.98      
8 A2 3575 3463 0.00      
9 A2 1397 1353 0.00      
10 A2 1073 1039 0.00      
11 A2 251 243 0.00      
12 B1 3573 3462 0.55      
13 B1 3118 3020 26.15      
14 B1 1372 1329 0.54      
15 B1 851 825 1.03      
16 B1 375 363 82.35      
17 B2 3485 3376 3.23      
18 B2 1655 1603 6.19      
19 B2 1388 1345 22.52      
20 B2 1105 1071 79.32      
21 B2 809 784 339.70      

Unscaled Zero Point Vibrational Energy (zpe) 18076.2 cm-1
Scaled (by 0.9687) Zero Point Vibrational Energy (zpe) 17510.4 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 QCISD/aug-cc-pVDZ
ABC
1.16327 0.29963 0.27116

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/aug-cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.559
N2 0.000 1.267 -0.186
N3 0.000 -1.267 -0.186
H4 0.888 0.000 1.212
H5 -0.888 0.000 1.212
H6 0.819 1.321 -0.794
H7 -0.819 1.321 -0.794
H8 -0.819 -1.321 -0.794
H9 0.819 -1.321 -0.794

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46911.46911.10271.10272.06042.06042.06042.0604
N21.46912.53332.08492.08491.02161.02162.78152.7815
N31.46912.53332.08492.08492.78152.78151.02161.0216
H41.10272.08492.08491.77652.40312.94682.94682.4031
H51.10272.08492.08491.77652.94682.40312.40312.9468
H62.06041.02162.78152.40312.94681.63733.10832.6421
H72.06041.02162.78152.94682.40311.63732.64213.1083
H82.06042.78151.02162.94682.40313.10832.64211.6373
H92.06042.78151.02162.40312.94682.64213.10831.6373

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.345 C1 N2 H7 110.345
C1 N3 H8 110.345 C1 N3 H9 110.345
N2 C1 N3 119.135 N2 C1 H4 107.467
N2 C1 H5 107.467 N3 C1 H4 107.467
N3 C1 H5 107.467 H4 C1 H5 107.318
H6 N2 H7 106.527 H8 N3 H9 106.527
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability