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All results from a given calculation for HNCCNH (Ethenediimine)

using model chemistry: QCISD(T)/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1AG
Energy calculated at QCISD(T)/6-311+G(3df,2p)
 hartrees
Energy at 0K-186.497215
Energy at 298.15K 
HF Energy-185.739668
Nuclear repulsion energy89.042723
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)/6-311+G(3df,2p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Ag 3432 3273        
2 Ag 2029 1936        
3 Ag 1169 1115        
4 Ag 903 861        
5 Ag 320 305        
6 Au 935 892        
7 Au 240 229        
8 Bg 680 648        
9 Bu 3432 3273        
10 Bu 1695 1617        
11 Bu 1130 1078        
12 Bu 276 263        

Unscaled Zero Point Vibrational Energy (zpe) 8120.4 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 7744.4 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(T)/6-311+G(3df,2p)
ABC
8.08017 0.14200 0.13955

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-311+G(3df,2p)

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.302 -0.586 0.000
C2 -0.302 0.586 0.000
N3 0.302 -1.839 0.000
N4 -0.302 1.839 0.000
H5 1.254 -2.218 0.000
H6 -1.254 2.218 0.000

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6
C11.31831.25352.49921.88913.2064
C21.31832.49921.25353.20641.8891
N31.25352.49923.72771.02384.3452
N42.49921.25353.72774.34521.0238
H51.88913.20641.02384.34525.0953
H63.20641.88914.34521.02385.0953

picture of Ethenediimine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 152.688 C1 N3 H5 111.708
C2 C1 N3 152.688 C2 N4 H6 111.708
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability