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All results from a given calculation for HNCCNH (Ethenediimine)

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

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)/aug-cc-pVTZ
 hartrees
Energy at 0K-186.511355
Energy at 298.15K 
HF Energy-185.743599
Nuclear repulsion energy88.987565
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)/aug-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 Ag 3411 3298        
2 Ag 2030 1962        
3 Ag 1171 1132        
4 Ag 904 874        
5 Ag 326 315        
6 Au 933 902        
7 Au 240 232        
8 Bg 678 655        
9 Bu 3411 3298        
10 Bu 1691 1635        
11 Bu 1133 1096        
12 Bu 277 267        

Unscaled Zero Point Vibrational Energy (zpe) 8102.5 cm-1
Scaled (by 0.9668) Zero Point Vibrational Energy (zpe) 7833.5 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)/aug-cc-pVTZ
ABC
8.09411 0.14177 0.13933

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.300 -0.587 0.000
C2 -0.300 0.587 0.000
N3 0.300 -1.842 0.000
N4 -0.300 1.842 0.000
H5 1.253 -2.216 0.000
H6 -1.253 2.216 0.000

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6
C11.31821.25472.50151.88773.2046
C21.31822.50151.25473.20461.8877
N31.25472.50153.73171.02394.3449
N42.50151.25473.73174.34491.0239
H51.88773.20461.02394.34495.0919
H63.20461.88774.34491.02395.0919

picture of Ethenediimine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 152.931 C1 N3 H5 111.479
C2 C1 N3 152.931 C2 N4 H6 111.479
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability