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All results from a given calculation for C2H2N2O (Furazan)

using model chemistry: QCISD/TZVP

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/TZVP
 hartrees
Energy at 0K-261.458903
Energy at 298.15K 
HF Energy-260.624283
Nuclear repulsion energy163.435731
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/TZVP
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 3324 3175 0.46      
2 A1 1499 1432 15.12      
3 A1 1368 1307 5.91      
4 A1 1070 1022 0.63      
5 A1 1033 986 17.06      
6 A1 892 852 28.16      
7 A2 782 747 0.00      
8 A2 594 568 0.00      
9 B1 845 807 39.69      
10 B1 618 590 0.80      
11 B2 3310 3162 0.06      
12 B2 1622 1549 0.04      
13 B2 1235 1179 4.41      
14 B2 965 922 17.60      
15 B2 912 871 0.23      

Unscaled Zero Point Vibrational Energy (zpe) 10033.6 cm-1
Scaled (by 0.9553) Zero Point Vibrational Energy (zpe) 9585.1 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/TZVP
ABC
0.35117 0.32313 0.16829

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.128
N2 0.000 1.133 0.351
N3 0.000 -1.133 0.351
C4 0.000 0.713 -0.878
C5 0.000 -0.713 -0.878
H6 0.000 1.405 -1.703
H7 0.000 -1.405 -1.703

Atom - Atom Distances (Å)
  O1 N2 N3 C4 C5 H6 H7
O11.37391.37392.12932.12933.16023.1602
N21.37392.26671.29942.21872.07203.2654
N31.37392.26672.21871.29943.26542.0720
C42.12931.29942.21871.42681.07612.2732
C52.12932.21871.29941.42682.27321.0761
H63.16022.07203.26541.07612.27322.8101
H73.16023.26542.07202.27321.07612.8101

picture of Furazan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 N2 C4 105.564 O1 N3 C5 105.564
N2 O1 N3 111.159 N2 C4 C5 108.857
N2 C4 H6 121.149 N3 C5 C4 108.857
N3 C5 H7 121.149 C4 C5 H7 129.994
C5 C4 H6 129.994
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability