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All results from a given calculation for C2H2N2O (Furazan)

using model chemistry: CCSD(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 CCSD(T)/cc-pVTZ
 hartrees
Energy at 0K-261.642092
Energy at 298.15K 
HF Energy-260.634454
Nuclear repulsion energy163.117938
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)/cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3289 3207        
2 A1 1456 1420        
3 A1 1335 1302        
4 A1 1058 1032        
5 A1 1021 995        
6 A1 890 868        
7 A2 898 875        
8 A2 646 630        
9 B1 859 837        
10 B1 639 623        
11 B2 3274 3192        
12 B2 1569 1529        
13 B2 1199 1169        
14 B2 955 931        
15 B2 879 856        

Unscaled Zero Point Vibrational Energy (zpe) 9983.2 cm-1
Scaled (by 0.9748) Zero Point Vibrational Energy (zpe) 9731.6 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(T)/cc-pVTZ
ABC
0.34869 0.32302 0.16768

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.129
N2 0.000 1.135 0.355
N3 0.000 -1.135 0.355
C4 0.000 0.711 -0.883
C5 0.000 -0.711 -0.883
H6 0.000 1.407 -1.705
H7 0.000 -1.407 -1.705

Atom - Atom Distances (Å)
  O1 N2 N3 C4 C5 H6 H7
O11.37341.37342.13432.13433.16413.1641
N21.37342.26931.30882.22302.07833.2716
N31.37342.26932.22301.30883.27162.0783
C42.13431.30882.22301.42271.07662.2719
C52.13432.22301.30881.42272.27191.0766
H63.16412.07833.27161.07662.27192.8132
H73.16413.27162.07832.27191.07662.8132

picture of Furazan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 N2 C4 105.425 O1 N3 C5 105.425
N2 O1 N3 111.414 N2 C4 C5 108.867
N2 C4 H6 120.906 N3 C5 C4 108.867
N3 C5 H7 120.906 C4 C5 H7 130.226
C5 C4 H6 130.226
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability