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)=FULL/6-31G*

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)=FULL/6-31G*
 hartrees
Energy at 0K-261.379803
Energy at 298.15K 
HF Energy-260.538210
Nuclear repulsion energy162.105995
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)=FULL/6-31G*
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 3293 3293        
2 A1 1476 1476        
3 A1 1348 1348        
4 A1 1075 1075        
5 A1 1008 1008        
6 A1 882 882        
7 A2 841 841        
8 A2 632 632        
9 B1 841 841        
10 B1 629 629        
11 B2 3280 3280        
12 B2 1588 1588        
13 B2 1212 1212        
14 B2 959 959        
15 B2 862 862        

Unscaled Zero Point Vibrational Energy (zpe) 9961.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 9961.8 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)=FULL/6-31G*
ABC
0.34519 0.31848 0.16565

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.138
N2 0.000 1.145 0.355
N3 0.000 -1.145 0.355
C4 0.000 0.713 -0.886
C5 0.000 -0.713 -0.886
H6 0.000 1.408 -1.717
H7 0.000 -1.408 -1.717

Atom - Atom Distances (Å)
  O1 N2 N3 C4 C5 H6 H7
O11.38731.38732.14542.14543.18323.1832
N21.38732.29061.31382.23432.08853.2883
N31.38732.29062.23431.31383.28832.0885
C42.14541.31382.23431.42601.08372.2782
C52.14542.23431.31381.42602.27821.0837
H63.18322.08853.28831.08372.27822.8164
H73.18323.28832.08852.27821.08372.8164

picture of Furazan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 N2 C4 105.143 O1 N3 C5 105.143
N2 O1 N3 111.293 N2 C4 C5 109.211
N2 C4 H6 120.884 N3 C5 C4 109.211
N3 C5 H7 120.884 C4 C5 H7 129.905
C5 C4 H6 129.905
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability