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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: QCISD/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 QCISD/6-31G*
 hartrees
Energy at 0K-150.731083
Energy at 298.15K-150.739188
HF Energy-150.235256
Counterpoise corrected energy-150.731083
CP Energy at 298.15K-150.739188
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy82.926032
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/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3472 3307 3.09      
2 A1 3094 2946 39.17      
3 A1 1731 1649 48.27      
4 A1 1542 1469 0.10      
5 A1 1157 1101 35.21      
6 A1 915 872 0.04      
7 A1 465 443 7.85      
8 A2 3563 3393 0.00      
9 A2 1428 1360 0.00      
10 A2 1099 1047 0.00      
11 A2 292 278 0.00      
12 B1 3562 3392 1.42      
13 B1 3143 2993 29.49      
14 B1 1416 1348 0.41      
15 B1 869 828 1.06      
16 B1 416 397 113.56      
17 B2 3473 3307 0.07      
18 B2 1722 1639 1.40      
19 B2 1423 1355 23.76      
20 B2 1126 1072 57.45      
21 B2 867 826 437.25      

Unscaled Zero Point Vibrational Energy (zpe) 18387.2 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 17510.1 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/6-31G*
ABC
1.16897 0.30229 0.27338

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.558
N2 0.000 1.263 -0.184
N3 0.000 -1.263 -0.184
H4 0.883 0.000 1.208
H5 -0.883 0.000 1.208
H6 0.817 1.304 -0.795
H7 -0.817 1.304 -0.795
H8 -0.817 -1.304 -0.795
H9 0.817 -1.304 -0.795

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46441.46441.09621.09622.04922.04922.04922.0492
N21.46442.52532.07622.07621.02131.02132.76222.7622
N31.46442.52532.07622.07622.76222.76221.02131.0213
H41.09622.07622.07621.76522.39122.93302.93302.3912
H51.09622.07622.07621.76522.93302.39122.39122.9330
H62.04921.02132.76222.39122.93301.63413.07792.6082
H72.04921.02132.76222.93302.39121.63412.60823.0779
H82.04922.76221.02132.93302.39123.07792.60821.6341
H92.04922.76221.02132.39122.93302.60823.07791.6341

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 109.768 C1 N2 H7 109.768
C1 N3 H8 109.768 C1 N3 H9 109.768
N2 C1 N3 119.133 N2 C1 H4 107.483
N2 C1 H5 107.483 N3 C1 H4 107.483
N3 C1 H5 107.483 H4 C1 H5 107.245
H6 N2 H7 106.271 H8 N3 H9 106.271
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability