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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: QCISD/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-150.800661
Energy at 298.15K-150.808697
HF Energy-150.261418
Counterpoise corrected energy-150.800661
CP Energy at 298.15K-150.808697
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy83.053413
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/6-31+G**
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 3563 3369 0.63      
2 A1 3131 2960 34.52      
3 A1 1713 1619 66.09      
4 A1 1540 1456 0.00      
5 A1 1118 1057 42.12      
6 A1 881 833 4.51      
7 A1 463 438 3.33      
8 A2 3663 3463 0.00      
9 A2 1426 1348 0.00      
10 A2 1090 1031 0.00      
11 A2 266 252 0.00      
12 B1 3662 3462 1.41      
13 B1 3186 3012 28.84      
14 B1 1404 1327 0.05      
15 B1 862 815 1.59      
16 B1 399 377 104.28      
17 B2 3563 3369 1.07      
18 B2 1704 1611 4.44      
19 B2 1429 1351 29.38      
20 B2 1119 1058 97.95      
21 B2 814 769 418.95      

Unscaled Zero Point Vibrational Energy (zpe) 18498.4 cm-1
Scaled (by 0.9454) Zero Point Vibrational Energy (zpe) 17488.4 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/6-31+G**
ABC
1.18351 0.30099 0.27313

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31+G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.554
N2 0.000 1.261 -0.186
N3 0.000 -1.261 -0.186
H4 0.880 0.000 1.198
H5 -0.880 0.000 1.198
H6 0.819 1.336 -0.780
H7 -0.819 1.336 -0.780
H8 -0.819 -1.336 -0.780
H9 0.819 -1.336 -0.780

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46211.46211.09041.09042.05762.05762.05762.0576
N21.46212.52242.06862.06861.01441.01442.78722.7872
N31.46212.52242.06862.06862.78722.78721.01441.0144
H41.09042.06862.06861.76002.38712.92942.92942.3871
H51.09042.06862.06861.76002.92942.38712.38712.9294
H62.05761.01442.78722.38712.92941.63823.13422.6719
H72.05761.01442.78722.92942.38711.63822.67193.1342
H82.05762.78721.01442.92942.38713.13422.67191.6382
H92.05762.78721.01442.38712.92942.67193.13421.6382

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 111.081 C1 N2 H7 111.081
C1 N3 H8 111.081 C1 N3 H9 111.081
N2 C1 N3 119.219 N2 C1 H4 107.382
N2 C1 H5 107.382 N3 C1 H4 107.382
N3 C1 H5 107.382 H4 C1 H5 107.609
H6 N2 H7 107.698 H8 N3 H9 107.698
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability