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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: CCSD(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 CCSD(T)/cc-pVTZ
 hartrees
Energy at 0K-150.970415
Energy at 298.15K-150.978428
HF Energy-150.305002
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy83.171739
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)/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 3486 3398        
2 A1 3065 2988        
3 A1 1669 1627        
4 A1 1500 1462        
5 A1 1119 1091        
6 A1 875 853        
7 A1 454 443        
8 A2 3573 3483        
9 A2 1406 1370        
10 A2 1079 1052        
11 A2 261 254        
12 B1 3571 3481        
13 B1 3109 3031        
14 B1 1380 1345        
15 B1 852 830        
16 B1 383 374        
17 B2 3487 3399        
18 B2 1658 1616        
19 B2 1392 1357        
20 B2 1097 1069        
21 B2 829 808        

Unscaled Zero Point Vibrational Energy (zpe) 18121.7 cm-1
Scaled (by 0.9748) Zero Point Vibrational Energy (zpe) 17665.1 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 CCSD(T)/cc-pVTZ
ABC
1.17539 0.30374 0.27443

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(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 -0.185
N3 0.000 -1.261 -0.185
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
C11.46281.46281.09111.09112.04132.04132.04132.0413
N21.46282.52112.07162.07161.01471.01472.75202.7520
N31.46282.52112.07162.07162.75202.75201.01471.0147
H41.09112.07162.07161.75652.38372.92082.92082.3837
H51.09112.07162.07161.75652.92082.38372.38372.9208
H62.04131.01472.75202.38372.92081.62223.06092.5957
H72.04131.01472.75202.92082.38371.62222.59573.0609
H82.04132.75201.01472.92082.38373.06092.59571.6222
H92.04132.75201.01472.38372.92082.59573.06091.6222

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 109.630 C1 N2 H7 109.630
C1 N3 H8 109.630 C1 N3 H9 109.630
N2 C1 N3 119.028 N2 C1 H4 107.521
N2 C1 H5 107.521 N3 C1 H4 107.521
N3 C1 H5 107.521 H4 C1 H5 107.199
H6 N2 H7 106.127 H8 N3 H9 106.127
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability