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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: CCSD(T)/6-31G**

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(T)/6-31G**
 hartrees
Energy at 0K-187.524908
Energy at 298.15K-187.528756
HF Energy-186.882660
Nuclear repulsion energy101.050797
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)/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 A 3679 3489        
2 A 3581 3397        
3 A 2372 2250        
4 A 1692 1605        
5 A 1232 1169        
6 A 821 778        
7 A 691 656        
8 A 379 360        
9 A 325 308        
10 A 192 182        
11 B 3678 3489        
12 B 3583 3399        
13 B 1691 1604        
14 B 1347 1277        
15 B 1230 1167        
16 B 751 712        
17 B 322 306        
18 B 159 151        

Unscaled Zero Point Vibrational Energy (zpe) 13862.6 cm-1
Scaled (by 0.9485) Zero Point Vibrational Energy (zpe) 13148.7 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(T)/6-31G**
ABC
4.99314 0.11730 0.11723

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.070 0.606 -0.018
C2 -0.070 -0.606 -0.018
N3 0.070 1.981 -0.052
N4 -0.070 -1.981 -0.052
H5 -0.192 2.395 0.834
H6 0.954 2.364 -0.361
H7 0.192 -2.395 0.834
H8 -0.954 -2.364 -0.361

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21931.37582.59071.99931.99773.12193.1597
C21.21932.59071.37583.12193.15971.99931.9977
N31.37582.59073.96471.01191.01204.46674.4747
N42.59071.37583.96474.46674.47471.01191.0120
H51.99933.12191.01194.46671.65584.80574.9658
H61.99773.15971.01204.47471.65584.96585.0982
H73.12191.99934.46671.01194.80574.96581.6558
H83.15971.99774.47471.01204.96585.09821.6558

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 173.295 C1 N3 H5 112.823
C1 N3 H6 112.681 C2 C1 N3 173.295
C2 N4 H7 112.823 C2 N4 H8 112.681
H5 N3 H6 109.793 H7 N4 H8 109.793
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability