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 H2NCHCHNH2 (diaminoethylene)

using model chemistry: CCSD=FULL/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at CCSD=FULL/Def2TZVPP
 hartrees
Energy at 0K-189.032505
Energy at 298.15K 
HF Energy-188.171992
Nuclear repulsion energy117.843163
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=FULL/Def2TZVPP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3643 3643 2.29      
2 A 3552 3552 0.92      
3 A 3183 3183 0.03      
4 A 1788 1788 0.18      
5 A 1670 1670 21.87      
6 A 1360 1360 0.59      
7 A 1304 1304 0.07      
8 A 1054 1054 0.76      
9 A 959 959 68.20      
10 A 840 840 113.75      
11 A 556 556 1.09      
12 A 317 317 2.33      
13 A 243 243 14.61      
14 B 3643 3643 6.25      
15 B 3551 3551 3.80      
16 B 3185 3185 37.58      
17 B 1677 1677 44.19      
18 B 1416 1416 8.99      
19 B 1188 1188 88.48      
20 B 1149 1149 0.17      
21 B 847 847 154.79      
22 B 771 771 221.47      
23 B 336 336 28.74      
24 B 244 244 95.59      

Unscaled Zero Point Vibrational Energy (zpe) 19236.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 19236.7 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=FULL/Def2TZVPP
ABC
1.44518 0.13310 0.12374

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/Def2TZVPP

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.314 0.587 0.027
C2 -0.314 -0.587 0.027
N3 -0.314 1.849 -0.106
N4 0.314 -1.849 -0.106
H5 1.395 0.626 0.026
H6 -1.395 -0.626 0.026
H7 -1.318 1.772 -0.045
H8 1.318 -1.772 -0.045
H9 -0.003 2.496 0.601
H10 0.003 -2.496 0.601

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10
C11.33191.41582.43961.08152.09612.01782.56432.01873.1517
C21.33192.43961.41582.09611.08152.56432.01783.15172.0187
N31.41582.43963.75072.10602.70371.00833.97171.00814.4135
N42.43961.41583.75072.70372.10603.97171.00834.41351.0081
H51.08152.09612.10602.70373.05812.94572.39982.40483.4663
H62.09611.08152.70372.10603.05812.39982.94573.46632.4048
H72.01782.56431.00833.97172.94572.39984.41591.63444.5139
H82.56432.01783.97171.00832.39982.94574.41594.51391.6344
H92.01873.15171.00814.41352.40483.46631.63444.51394.9922
H103.15172.01874.41351.00813.46632.40484.51391.63444.9922

picture of diaminoethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 125.176 C1 C2 H6 120.216
C1 N3 H7 111.590 C1 N3 H9 111.676
C2 C1 N3 125.176 C2 C1 H5 120.216
C2 N4 H8 111.590 C2 N4 H10 111.676
N3 C1 H5 114.314 N4 C2 H6 114.314
H7 N3 H9 108.304 H8 N4 H10 108.304
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability