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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: MP2/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-150.919502
Energy at 298.15K-150.927533
HF Energy-150.305487
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy83.391724
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/cc-pVTZ
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 3524 3346 0.12      
2 A1 3106 2949 32.53      
3 A1 1665 1581 41.44      
4 A1 1509 1433 0.05      
5 A1 1121 1064 33.60      
6 A1 869 825 0.50      
7 A1 459 436 4.28      
8 A2 3624 3441 0.00      
9 A2 1413 1341 0.00      
10 A2 1080 1026 0.00      
11 A2 266 253 0.00      
12 B1 3621 3438 2.95      
13 B1 3160 3000 20.99      
14 B1 1378 1309 0.60      
15 B1 858 814 0.69      
16 B1 393 374 85.50      
17 B2 3525 3347 2.41      
18 B2 1655 1571 3.51      
19 B2 1397 1326 18.06      
20 B2 1109 1053 68.52      
21 B2 810 769 403.42      

Unscaled Zero Point Vibrational Energy (zpe) 18270.6 cm-1
Scaled (by 0.9495) Zero Point Vibrational Energy (zpe) 17347.9 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/cc-pVTZ
ABC
1.18602 0.30481 0.27577

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.554
N2 0.000 1.257 -0.183
N3 0.000 -1.257 -0.183
H4 0.876 0.000 1.200
H5 -0.876 0.000 1.200
H6 0.811 1.303 -0.788
H7 -0.811 1.303 -0.788
H8 -0.811 -1.303 -0.788
H9 0.811 -1.303 -0.788

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45741.45741.08831.08832.03882.03882.03882.0388
N21.45742.51442.06432.06431.01261.01262.75282.7528
N31.45742.51442.06432.06432.75282.75281.01261.0126
H41.08832.06432.06431.75122.37822.91472.91472.3782
H51.08832.06432.06431.75122.91472.37822.37822.9147
H62.03881.01262.75282.37822.91471.62153.06942.6061
H72.03881.01262.75282.91472.37821.62152.60613.0694
H82.03882.75281.01262.91472.37823.06942.60611.6215
H92.03882.75281.01262.37822.91472.60613.06941.6215

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 109.952 C1 N2 H7 109.952
C1 N3 H8 109.952 C1 N3 H9 109.952
N2 C1 N3 119.226 N2 C1 H4 107.481
N2 C1 H5 107.481 N3 C1 H4 107.481
N3 C1 H5 107.481 H4 C1 H5 107.142
H6 N2 H7 106.389 H8 N3 H9 106.389
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability