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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: CCSD(T)/aug-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 CCSD(T)/aug-cc-pVTZ
 hartrees
Energy at 0K-150.985629
Energy at 298.15K-150.993596
HF Energy-150.308610
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy83.063180
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 CCSD(T)/aug-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 3481 3376        
2 A1 3061 2969        
3 A1 1664 1614        
4 A1 1501 1456        
5 A1 1100 1067        
6 A1 856 831        
7 A1 453 439        
8 A2 3568 3460        
9 A2 1401 1359        
10 A2 1073 1041        
11 A2 252 245        
12 B1 3566 3458        
13 B1 3107 3014        
14 B1 1374 1333        
15 B1 848 822        
16 B1 370 358        
17 B2 3481 3377        
18 B2 1654 1604        
19 B2 1388 1347        
20 B2 1088 1055        
21 B2 806 782        

Unscaled Zero Point Vibrational Energy (zpe) 18045.2 cm-1
Scaled (by 0.9699) Zero Point Vibrational Energy (zpe) 17502.0 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 CCSD(T)/aug-cc-pVTZ
ABC
1.17500 0.30246 0.27364

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.557
N2 0.000 1.261 -0.185
N3 0.000 -1.261 -0.185
H4 0.880 0.000 1.204
H5 -0.880 0.000 1.204
H6 0.815 1.314 -0.789
H7 -0.815 1.314 -0.789
H8 -0.815 -1.314 -0.789
H9 0.815 -1.314 -0.789

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46361.46361.09191.09192.05022.05022.05022.0502
N21.46362.52212.07222.07221.01541.01542.76752.7675
N31.46362.52212.07222.07222.76752.76751.01541.0154
H41.09192.07222.07221.76042.38772.92742.92742.3877
H51.09192.07222.07221.76042.92742.38772.38772.9274
H62.05021.01542.76752.38772.92741.62963.09222.6280
H72.05021.01542.76752.92742.38771.62962.62803.0922
H82.05022.76751.01542.92742.38773.09222.62801.6296
H92.05022.76751.01542.38772.92742.62803.09221.6296

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.283 C1 N2 H7 110.283
C1 N3 H8 110.283 C1 N3 H9 110.283
N2 C1 N3 118.998 N2 C1 H4 107.477
N2 C1 H5 107.477 N3 C1 H4 107.477
N3 C1 H5 107.477 H4 C1 H5 107.445
H6 N2 H7 106.725 H8 N3 H9 106.725
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability