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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: MP4=FULL/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 MP4=FULL/cc-pVTZ
 hartrees
Energy at 0K-151.017980
Energy at 298.15K-151.026018
HF Energy-150.305488
Nuclear repulsion energy83.436681
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 MP4=FULL/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 3505 3374        
2 A1 3087 2973        
3 A1 1672 1610        
4 A1 1507 1451        
5 A1 1119 1078        
6 A1 874 841        
7 A1 459 442        
8 A2 3592 3459        
9 A2 1410 1358        
10 A2 1081 1040        
11 A2 267 257        
12 B1 3589 3456        
13 B1 3114 2998        
14 B1 1382 1330        
15 B1 852 821        
16 B1 397 383        
17 B2 3505 3375        
18 B2 1659 1597        
19 B2 1394 1342        
20 B2 1104 1063        
21 B2 822 791        

Unscaled Zero Point Vibrational Energy (zpe) 18194.8 cm-1
Scaled (by 0.9629) Zero Point Vibrational Energy (zpe) 17519.8 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 MP4=FULL/cc-pVTZ
ABC
1.18393 0.30560 0.27627

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.555
N2 0.000 1.256 -0.184
N3 0.000 -1.256 -0.184
H4 0.875 0.000 1.200
H5 -0.875 0.000 1.200
H6 0.811 1.297 -0.789
H7 -0.811 1.297 -0.789
H8 -0.811 -1.297 -0.789
H9 0.811 -1.297 -0.789

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45741.45741.08681.08682.03642.03642.03642.0364
N21.45742.51222.06372.06371.01251.01252.74652.7465
N31.45742.51222.06372.06372.74652.74651.01251.0125
H41.08682.06372.06371.74912.37582.91212.91212.3758
H51.08682.06372.06371.74912.91212.37582.37582.9121
H62.03641.01252.74652.37582.91211.62163.05982.5947
H72.03641.01252.74652.91212.37581.62162.59473.0598
H82.03642.74651.01252.91212.37583.05982.59471.6216
H92.03642.74651.01252.37582.91212.59473.05981.6216

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 109.765 C1 N2 H7 109.765
C1 N3 H8 109.765 C1 N3 H9 109.765
N2 C1 N3 119.053 N2 C1 H4 107.521
N2 C1 H5 107.521 N3 C1 H4 107.521
N3 C1 H5 107.521 H4 C1 H5 107.168
H6 N2 H7 106.416 H8 N3 H9 106.416
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability