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(T)=FULL/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 CCSD(T)=FULL/cc-pVTZ
 hartrees
Energy at 0K-261.714383
Energy at 298.15K 
HF Energy-260.636176
Nuclear repulsion energy163.771122
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(T)=FULL/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 3312 3173        
2 A1 1471 1410        
3 A1 1349 1293        
4 A1 1069 1024        
5 A1 1031 988        
6 A1 900 862        
7 A2 926 887        
8 A2 655 628        
9 B1 878 841        
10 B1 647 620        
11 B2 3293 3155        
12 B2 1581 1514        
13 B2 1213 1162        
14 B2 963 923        
15 B2 889 852        

Unscaled Zero Point Vibrational Energy (zpe) 10089.4 cm-1
Scaled (by 0.958) Zero Point Vibrational Energy (zpe) 9665.7 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(T)=FULL/cc-pVTZ
ABC
0.35113 0.32591 0.16902

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.125
N2 0.000 1.130 0.354
N3 0.000 -1.130 0.354
C4 0.000 0.708 -0.880
C5 0.000 -0.708 -0.880
H6 0.000 1.397 -1.701
H7 0.000 -1.397 -1.701

Atom - Atom Distances (Å)
  O1 N2 N3 C4 C5 H6 H7
O11.36761.36762.12642.12643.15193.1519
N21.36762.25961.30422.21422.07213.2567
N31.36762.25962.21421.30423.25672.0721
C42.12641.30422.21421.41681.07102.2594
C52.12642.21421.30421.41682.25941.0710
H63.15192.07213.25671.07102.25942.7935
H73.15193.25672.07212.25941.07102.7935

picture of Furazan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 N2 C4 105.449 O1 N3 C5 105.449
N2 O1 N3 111.404 N2 C4 C5 108.849
N2 C4 H6 121.158 N3 C5 C4 108.849
N3 C5 H7 121.158 C4 C5 H7 129.992
C5 C4 H6 129.992
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability