return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C2H2N2O (Furazan)

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 C2V 1A1
Energy calculated at QCISD(T)/cc-pVTZ
 hartrees
Energy at 0K-261.643704
Energy at 298.15K 
HF Energy-260.634126
Nuclear repulsion energy162.996802
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 A1 3289 3120        
2 A1 1457 1382        
3 A1 1334 1265        
4 A1 1059 1005        
5 A1 1017 964        
6 A1 885 840        
7 A2 902 855        
8 A2 647 614        
9 B1 861 816        
10 B1 638 605        
11 B2 3275 3106        
12 B2 1568 1487        
13 B2 1198 1136        
14 B2 954 905        
15 B2 868 824        

Unscaled Zero Point Vibrational Energy (zpe) 9974.7 cm-1
Scaled (by 0.9486) Zero Point Vibrational Energy (zpe) 9462.0 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
0.34833 0.32240 0.16743

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.130
N2 0.000 1.136 0.355
N3 0.000 -1.136 0.355
C4 0.000 0.712 -0.883
C5 0.000 -0.712 -0.883
H6 0.000 1.406 -1.706
H7 0.000 -1.406 -1.706

Atom - Atom Distances (Å)
  O1 N2 N3 C4 C5 H6 H7
O11.37551.37552.13582.13583.16613.1661
N21.37552.27211.30892.22442.07893.2727
N31.37552.27212.22441.30893.27272.0789
C42.13581.30892.22441.42361.07672.2721
C52.13582.22441.30891.42362.27211.0767
H63.16612.07893.27271.07672.27212.8119
H73.16613.27272.07892.27211.07672.8119

picture of Furazan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 N2 C4 105.405 O1 N3 C5 105.405
N2 O1 N3 111.367 N2 C4 C5 108.912
N2 C4 H6 120.947 N3 C5 C4 108.912
N3 C5 H7 120.947 C4 C5 H7 130.141
C5 C4 H6 130.141
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability