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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: QCISD(T)/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 QCISD(T)/cc-pVTZ
 hartrees
Energy at 0K-150.970838
Energy at 298.15K-150.978850
HF Energy-150.304974
Nuclear repulsion energy83.158945
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(T)/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 3485 3305        
2 A1 3064 2906        
3 A1 1668 1582        
4 A1 1499 1422        
5 A1 1119 1061        
6 A1 874 829        
7 A1 454 431        
8 A2 3571 3388        
9 A2 1405 1333        
10 A2 1079 1024        
11 A2 261 247        
12 B1 3569 3386        
13 B1 3108 2948        
14 B1 1380 1309        
15 B1 851 808        
16 B1 383 364        
17 B2 3485 3306        
18 B2 1658 1572        
19 B2 1391 1320        
20 B2 1096 1039        
21 B2 829 787        

Unscaled Zero Point Vibrational Energy (zpe) 18114.2 cm-1
Scaled (by 0.9486) Zero Point Vibrational Energy (zpe) 17183.1 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(T)/cc-pVTZ
ABC
1.17525 0.30361 0.27432

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.558
N2 0.000 1.261 -0.184
N3 0.000 -1.261 -0.184
H4 0.878 0.000 1.205
H5 -0.878 0.000 1.205
H6 0.811 1.298 -0.793
H7 -0.811 1.298 -0.793
H8 -0.811 -1.298 -0.793
H9 0.811 -1.298 -0.793

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46311.46311.09121.09122.04142.04142.04142.0414
N21.46312.52182.07182.07181.01481.01482.75242.7524
N31.46312.52182.07182.07182.75242.75241.01481.0148
H41.09122.07182.07181.75672.38382.92102.92102.3838
H51.09122.07182.07181.75672.92102.38382.38382.9210
H62.04141.01482.75242.38382.92101.62233.06102.5958
H72.04141.01482.75242.92102.38381.62232.59583.0610
H82.04142.75241.01482.92102.38383.06102.59581.6223
H92.04142.75241.01482.38382.92102.59583.06101.6223

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 109.615 C1 N2 H7 109.615
C1 N3 H8 109.615 C1 N3 H9 109.615
N2 C1 N3 119.040 N2 C1 H4 107.516
N2 C1 H5 107.516 N3 C1 H4 107.516
N3 C1 H5 107.516 H4 C1 H5 107.209
H6 N2 H7 106.121 H8 N3 H9 106.121
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability