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: MP2/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/3-21G
 hartrees
Energy at 0K-259.614456
Energy at 298.15K 
HF Energy-259.051826
Nuclear repulsion energy156.500754
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 MP2/3-21G
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 3323 3172 3.43 84.01 0.10 0.18
2 A1 1341 1280 27.07 11.02 0.74 0.85
3 A1 1122 1071 11.57 17.80 0.19 0.32
4 A1 1073 1024 0.65 4.08 0.33 0.50
5 A1 929 887 2.45 3.49 0.64 0.78
6 A1 825 787 6.85 5.91 0.12 0.21
7 A2 879 839 0.00 1.63 0.75 0.86
8 A2 641 612 0.00 0.75 0.75 0.86
9 B1 853 814 52.35 1.79 0.75 0.86
10 B1 590 563 0.76 0.26 0.75 0.86
11 B2 3305 3155 0.12 50.37 0.75 0.86
12 B2 1401 1338 13.81 0.48 0.75 0.86
13 B2 1153 1101 3.05 0.00 0.75 0.86
14 B2 959 915 10.95 4.62 0.75 0.86
15 B2 789 753 0.07 0.45 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 9591.5 cm-1
Scaled (by 0.9545) Zero Point Vibrational Energy (zpe) 9155.1 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 MP2/3-21G
ABC
0.32217 0.29655 0.15442

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.200
N2 0.000 1.208 0.346
N3 0.000 -1.208 0.346
C4 0.000 0.711 -0.911
C5 0.000 -0.711 -0.911
H6 0.000 1.378 -1.757
H7 0.000 -1.378 -1.757

Atom - Atom Distances (Å)
  O1 N2 N3 C4 C5 H6 H7
O11.47971.47972.22702.22703.26213.2621
N21.47972.41671.35132.29382.10933.3333
N31.47972.41672.29381.35133.33332.1093
C42.22701.35132.29381.42161.07772.2538
C52.22702.29381.35131.42162.25381.0777
H63.26212.10933.33331.07772.25382.7564
H73.26213.33332.10932.25381.07772.7564

picture of Furazan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 N2 C4 103.651 O1 N3 C5 103.651
N2 O1 N3 109.490 N2 C4 C5 111.604
N2 C4 H6 120.129 N3 C5 C4 111.604
N3 C5 H7 120.129 C4 C5 H7 128.267
C5 C4 H6 128.267
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability