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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: QCISD(T)/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at QCISD(T)/cc-pVTZ
 hartrees
Energy at 0K-187.726587
Energy at 298.15K-187.730586
HF Energy-186.949737
Nuclear repulsion energy101.488756
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(T)/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 A 3627 3441        
2 A 3539 3357        
3 A 2355 2234        
4 A 1657 1572        
5 A 1220 1157        
6 A 811 769        
7 A 662 628        
8 A 389 369        
9 A 333 316        
10 A 198 188        
11 B 3627 3441        
12 B 3540 3358        
13 B 1657 1572        
14 B 1337 1268        
15 B 1220 1157        
16 B 720 683        
17 B 389 369        
18 B 198 188        

Unscaled Zero Point Vibrational Energy (zpe) 13739.0 cm-1
Scaled (by 0.9486) Zero Point Vibrational Energy (zpe) 13032.8 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 QCISD(T)/cc-pVTZ
ABC
5.04881 0.11831 0.11828

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/cc-pVTZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.013 0.606 0.001
C2 -0.013 -0.606 0.001
N3 -0.013 1.973 -0.062
N4 0.013 -1.973 -0.062
H5 -0.302 2.404 0.804
H6 0.861 2.370 -0.375
H7 0.302 -2.404 0.804
H8 -0.861 -2.370 -0.375

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21191.36902.57961.99461.99293.12843.1241
C21.21192.57961.36903.12843.12411.99461.9929
N31.36902.57963.94621.00981.01004.47304.4359
N42.57961.36903.94624.47304.43591.00981.0100
H51.99463.12841.00984.47301.65674.84544.9488
H61.99293.12411.01004.43591.65674.94885.0429
H73.12841.99464.47301.00984.84544.94881.6567
H83.12411.99294.43591.01004.94885.04291.6567

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 176.438 C1 N3 H5 113.092
C1 N3 H6 112.925 C2 C1 N3 176.438
C2 N4 H7 113.092 C2 N4 H8 112.925
H5 N3 H6 110.216 H7 N4 H8 110.216
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability