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All results from a given calculation for HNCCNH (Ethenediimine)

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 C2H 1AG
Energy calculated at QCISD(T)/cc-pVTZ
 hartrees
Energy at 0K-186.497239
Energy at 298.15K 
HF Energy-185.740700
Nuclear repulsion energy89.005022
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 Ag 3414 3239        
2 Ag 2041 1936        
3 Ag 1178 1118        
4 Ag 905 858        
5 Ag 303 287        
6 Au 941 892        
7 Au 244 231        
8 Bg 679 644        
9 Bu 3415 3239        
10 Bu 1694 1607        
11 Bu 1141 1082        
12 Bu 281 266        

Unscaled Zero Point Vibrational Energy (zpe) 8117.6 cm-1
Scaled (by 0.9486) Zero Point Vibrational Energy (zpe) 7700.4 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)/cc-pVTZ
ABC
8.12069 0.14174 0.13931

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.295 -0.588 0.000
C2 -0.295 0.588 0.000
N3 0.295 -1.843 0.000
N4 -0.295 1.843 0.000
H5 1.251 -2.210 0.000
H6 -1.251 2.210 0.000

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6
C11.31671.25492.50251.88233.1973
C21.31672.50251.25493.19731.8823
N31.25492.50253.73371.02354.3384
N42.50251.25493.73374.33841.0235
H51.88233.19731.02354.33845.0791
H63.19731.88234.33841.02355.0791

picture of Ethenediimine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 153.347 C1 N3 H5 111.004
C2 C1 N3 153.347 C2 N4 H6 111.004
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability