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: CCSD/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCSD/Def2TZVPP
 hartrees
Energy at 0K-261.597012
Energy at 298.15K 
HF Energy-260.647907
Nuclear repulsion energy164.237158
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 CCSD/Def2TZVPP
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 3317 3317 0.58      
2 A1 1502 1502 15.40      
3 A1 1373 1373 4.56      
4 A1 1071 1071 3.52      
5 A1 1052 1052 19.54      
6 A1 920 920 23.63      
7 A2 916 916 0.00      
8 A2 658 658 0.00      
9 B1 882 882 38.14      
10 B1 651 651 1.51      
11 B2 3303 3303 0.14      
12 B2 1624 1624 0.09      
13 B2 1229 1229 3.30      
14 B2 973 973 21.29      
15 B2 956 956 0.71      

Unscaled Zero Point Vibrational Energy (zpe) 10213.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 10213.6 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 CCSD/Def2TZVPP
ABC
0.35340 0.32730 0.16992

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.121
N2 0.000 1.124 0.354
N3 0.000 -1.124 0.354
C4 0.000 0.712 -0.877
C5 0.000 -0.712 -0.877
H6 0.000 1.407 -1.696
H7 0.000 -1.407 -1.696

Atom - Atom Distances (Å)
  O1 N2 N3 C4 C5 H6 H7
O11.36061.36062.12112.12113.14913.1491
N21.36062.24701.29772.20982.06933.2567
N31.36062.24702.20981.29773.25672.0693
C42.12111.29772.20981.42371.07442.2718
C52.12112.20981.29771.42372.27181.0744
H63.14912.06933.25671.07442.27182.8142
H73.14913.25672.06932.27181.07442.8142

picture of Furazan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 N2 C4 105.842 O1 N3 C5 105.842
N2 O1 N3 111.327 N2 C4 C5 108.495
N2 C4 H6 121.183 N3 C5 C4 108.495
N3 C5 H7 121.183 C4 C5 H7 130.322
C5 C4 H6 130.322
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability