return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: QCISD/3-21G

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/3-21G
 hartrees
Energy at 0K-149.738478
Energy at 298.15K-149.746479
HF Energy-149.399733
Counterpoise corrected energy-149.738478
CP Energy at 298.15K-149.746479
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy81.543478
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/3-21G
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 3366 3262 9.92      
2 A1 3058 2964 35.42      
3 A1 1754 1700 30.64      
4 A1 1548 1500 0.74      
5 A1 1098 1064 51.46      
6 A1 786 761 2.16      
7 A1 440 427 7.18      
8 A2 3461 3354 0.00      
9 A2 1430 1386 0.00      
10 A2 1097 1063 0.00      
11 A2 296 287 0.00      
12 B1 3461 3355 8.92      
13 B1 3104 3008 25.91      
14 B1 1394 1351 0.58      
15 B1 839 813 0.29      
16 B1 430 417 121.73      
17 B2 3366 3263 1.58      
18 B2 1741 1688 0.09      
19 B2 1416 1373 6.61      
20 B2 1041 1009 6.71      
21 B2 714 692 542.22      

Unscaled Zero Point Vibrational Energy (zpe) 17919.3 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 17367.4 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/3-21G
ABC
1.15244 0.28747 0.26157

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.564
N2 0.000 1.290 -0.191
N3 0.000 -1.290 -0.191
H4 0.888 0.000 1.207
H5 -0.888 0.000 1.207
H6 0.836 1.377 -0.781
H7 -0.836 1.377 -0.781
H8 -0.836 -1.377 -0.781
H9 0.836 -1.377 -0.781

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.49441.49441.09681.09682.09812.09812.09812.0981
N21.49442.57962.09932.09931.02711.02712.85612.8561
N31.49442.57962.09932.09932.85612.85611.02711.0271
H41.09682.09932.09931.77682.41842.97002.97002.4184
H51.09682.09932.09931.77682.97002.41842.41842.9700
H62.09811.02712.85612.41842.97001.67283.22152.7532
H72.09811.02712.85612.97002.41841.67282.75323.2215
H82.09812.85611.02712.97002.41843.22152.75321.6728
H92.09812.85611.02712.41842.97002.75323.22151.6728

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 111.279 C1 N2 H7 111.279
C1 N3 H8 111.279 C1 N3 H9 111.279
N2 C1 N3 119.340 N2 C1 H4 107.226
N2 C1 H5 107.226 N3 C1 H4 107.226
N3 C1 H5 107.226 H4 C1 H5 108.190
H6 N2 H7 109.035 H8 N3 H9 109.035
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability