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/aug-cc-pVDZ

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/aug-cc-pVDZ
 hartrees
Energy at 0K-261.408676
Energy at 298.15K 
HF Energy-260.579691
Nuclear repulsion energy162.199260
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/aug-cc-pVDZ
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 3304 3200 0.37      
2 A1 1498 1451 16.25      
3 A1 1347 1305 5.51      
4 A1 1054 1021 1.57      
5 A1 1016 984 14.65      
6 A1 878 851 24.18      
7 A2 869 842 0.00      
8 A2 637 617 0.00      
9 B1 856 829 38.23      
10 B1 627 608 1.35      
11 B2 3288 3186 0.06      
12 B2 1605 1555 0.00      
13 B2 1199 1161 3.42      
14 B2 956 927 20.20      
15 B2 890 862 0.26      

Unscaled Zero Point Vibrational Energy (zpe) 10012.3 cm-1
Scaled (by 0.9687) Zero Point Vibrational Energy (zpe) 9698.9 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/aug-cc-pVDZ
ABC
0.34573 0.31839 0.16575

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.135
N2 0.000 1.141 0.356
N3 0.000 -1.141 0.356
C4 0.000 0.720 -0.886
C5 0.000 -0.720 -0.886
H6 0.000 1.422 -1.717
H7 0.000 -1.422 -1.717

Atom - Atom Distances (Å)
  O1 N2 N3 C4 C5 H6 H7
O11.38121.38122.14512.14513.18683.1868
N21.38122.28121.31112.23682.09193.2960
N31.38122.28122.23681.31113.29602.0919
C42.14511.31112.23681.43961.08812.2974
C52.14512.23681.31111.43962.29741.0881
H63.18682.09193.29601.08812.29742.8439
H73.18683.29602.09192.29741.08812.8439

picture of Furazan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 N2 C4 105.611 O1 N3 C5 105.611
N2 O1 N3 111.338 N2 C4 C5 108.720
N2 C4 H6 121.092 N3 C5 C4 108.720
N3 C5 H7 121.092 C4 C5 H7 130.188
C5 C4 H6 130.188
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability