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All results from a given calculation for C4H4O (Furan)

using model chemistry: G3

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no C2V 1A1
Energy calculated at G3
 hartrees
Energy at 0K-229.859953
Energy at 298.15K-229.855258
HF Energy-228.625214
Nuclear repulsion energy162.572609
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 HF/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 3485 3284 0.10 174.05 0.13 0.23
2 A1 3448 3248 2.62 38.46 0.19 0.32
3 A1 1681 1584 32.36 39.79 0.20 0.34
4 A1 1553 1463 3.10 18.40 0.38 0.55
5 A1 1269 1196 0.72 26.00 0.35 0.52
6 A1 1162 1094 42.04 6.95 0.11 0.20
7 A1 1093 1029 32.51 0.20 0.49 0.65
8 A1 957 901 20.86 0.62 0.64 0.78
9 A2 1011 953 0.00 1.95 0.75 0.86
10 A2 854 805 0.00 2.42 0.75 0.86
11 A2 663 625 0.00 0.18 0.75 0.86
12 B1 990 933 0.18 0.57 0.75 0.86
13 B1 862 812 89.29 1.20 0.75 0.86
14 B1 660 622 34.54 3.24 0.75 0.86
15 B2 3479 3278 6.32 16.69 0.75 0.86
16 B2 3435 3237 4.53 91.23 0.75 0.86
17 B2 1770 1668 2.08 1.55 0.75 0.86
18 B2 1417 1335 0.21 0.55 0.75 0.86
19 B2 1324 1247 23.66 1.00 0.75 0.86
20 B2 1169 1101 0.00 5.99 0.75 0.86
21 B2 961 906 1.01 4.61 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16621.0 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 15660.3 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=FULL/6-31G*
ABC
0.31670 0.30731 0.15597

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.163
C2 0.000 1.095 0.348
C3 0.000 -1.095 0.348
C4 0.000 0.713 -0.962
C5 0.000 -0.713 -0.962
H6 0.000 2.050 0.851
H7 0.000 -2.050 0.851
H8 0.000 1.371 -1.820
H9 0.000 -1.371 -1.820

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9
O11.36501.36502.24212.24212.07362.07363.28323.2832
C21.36502.18931.36462.23281.07943.18442.18533.2833
C31.36502.18932.23281.36463.18441.07943.28332.1853
C42.24211.36462.23281.42652.25233.30481.08092.2541
C52.24212.23281.36461.42653.30482.25232.25411.0809
H62.07361.07943.18442.25233.30484.09972.75524.3400
H72.07363.18441.07943.30482.25234.09974.34002.7552
H83.28322.18533.28331.08092.25412.75524.34002.7427
H93.28323.28332.18532.25411.08094.34002.75522.7427

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 110.792 O1 C2 H6 116.153
O1 C3 C5 110.792 O1 C3 H7 116.153
C2 O1 C3 107.170 C2 C4 C5 105.623
C2 C4 H8 126.742 C3 C5 C4 105.623
C3 C5 H9 126.742 C4 C2 H6 133.055
C4 C5 H9 127.635 C5 C3 H7 133.055
C5 C4 H8 127.635
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability