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: CCSD/6-31G*

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/6-31G*
 hartrees
Energy at 0K-150.730375
Energy at 298.15K-150.738482
HF Energy-150.235314
Nuclear repulsion energy82.952370
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/6-31G*
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 3476 3282 2.87      
2 A1 3098 2925 38.47      
3 A1 1732 1635 48.70      
4 A1 1544 1458 0.11      
5 A1 1158 1093 35.57      
6 A1 917 866 0.02      
7 A1 466 440 7.82      
8 A2 3567 3368 0.00      
9 A2 1429 1349 0.00      
10 A2 1100 1039 0.00      
11 A2 291 275 0.00      
12 B1 3565 3367 1.25      
13 B1 3147 2972 28.85      
14 B1 1417 1338 0.41      
15 B1 870 822 1.03      
16 B1 416 393 113.86      
17 B2 3476 3282 0.05      
18 B2 1722 1626 1.51      
19 B2 1425 1345 23.71      
20 B2 1129 1066 57.72      
21 B2 868 820 435.67      

Unscaled Zero Point Vibrational Energy (zpe) 18405.8 cm-1
Scaled (by 0.9443) Zero Point Vibrational Energy (zpe) 17380.6 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/6-31G*
ABC
1.16926 0.30256 0.27360

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.558
N2 0.000 1.262 -0.184
N3 0.000 -1.262 -0.184
H4 0.882 0.000 1.208
H5 -0.882 0.000 1.208
H6 0.817 1.304 -0.795
H7 -0.817 1.304 -0.795
H8 -0.817 -1.304 -0.795
H9 0.817 -1.304 -0.795

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46391.46391.09591.09592.04882.04882.04882.0488
N21.46392.52402.07572.07571.02111.02112.76122.7612
N31.46392.52402.07572.07572.76122.76121.02111.0211
H41.09592.07572.07571.76462.39082.93242.93242.3908
H51.09592.07572.07571.76462.93242.39082.39082.9324
H62.04881.02112.76122.39082.93241.63403.07732.6076
H72.04881.02112.76122.93242.39081.63402.60763.0773
H82.04882.76121.02112.93242.39083.07732.60761.6340
H92.04882.76121.02112.39082.93242.60763.07731.6340

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 109.788 C1 N2 H7 109.788
C1 N3 H8 109.788 C1 N3 H9 109.788
N2 C1 N3 119.108 N2 C1 H4 107.493
N2 C1 H5 107.493 N3 C1 H4 107.493
N3 C1 H5 107.493 H4 C1 H5 107.229
H6 N2 H7 106.286 H8 N3 H9 106.286
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability