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All results from a given calculation for C4H4O (Furan)

using model chemistry: MP2/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
Energy calculated at MP2/6-311G*
 hartrees
Energy at 0K 
Energy at 298.15K 
HF Energy-228.669651
Nuclear repulsion energy160.675505
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 MP2/6-311G*
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 3319 3154 0.04 197.66 0.14 0.25
2 A1 3293 3129 0.21 26.28 0.31 0.47
3 A1 1517 1442 16.52 22.73 0.21 0.34
4 A1 1428 1357 6.93 13.05 0.43 0.60
5 A1 1171 1113 0.02 23.11 0.19 0.32
6 A1 1121 1065 11.83 6.52 0.25 0.40
7 A1 1034 982 41.17 1.14 0.24 0.39
8 A1 884 840 12.76 0.87 0.73 0.84
9 A2 773 735 0.00 0.49 0.75 0.86
10 A2 684 650 0.00 0.44 0.75 0.86
11 A2 570 541 0.00 0.00 0.75 0.86
12 B1 783 744 1.54 0.00 0.75 0.86
13 B1 740 703 120.70 0.62 0.75 0.86
14 B1 624 593 23.70 1.50 0.75 0.86
15 B2 3313 3148 1.47 12.75 0.75 0.86
16 B2 3282 3119 1.62 96.57 0.75 0.86
17 B2 1583 1504 0.11 0.04 0.75 0.86
18 B2 1291 1227 1.79 0.47 0.75 0.86
19 B2 1255 1193 29.06 0.68 0.75 0.86
20 B2 1071 1018 3.16 2.48 0.75 0.86
21 B2 887 843 0.13 3.30 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 15310.7 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 14549.8 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 MP2/6-311G*
ABC
0.31735 0.30641 0.15589

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.162
C2 0.000 1.091 0.351
C3 0.000 -1.091 0.351
C4 0.000 0.715 -0.965
C5 0.000 -0.715 -0.965
H6 0.000 2.046 0.855
H7 0.000 -2.046 0.855
H8 0.000 1.377 -1.820
H9 0.000 -1.377 -1.820

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9
O11.35941.35942.24442.24442.06882.06883.28443.2844
C21.35942.18241.36912.23551.07933.17722.18983.2872
C31.35942.18242.23551.36913.17721.07933.28722.1898
C42.24441.36912.23551.43092.25453.30721.08072.2602
C52.24442.23551.36911.43093.30722.25452.26021.0807
H62.06881.07933.17722.25453.30724.09182.75694.3439
H72.06883.17721.07933.30722.25454.09184.34392.7569
H83.28442.18983.28721.08072.26022.75694.34392.7541
H93.28443.28722.18982.26021.08074.34392.75692.7541

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 110.682 O1 C2 H6 115.584
O1 C3 C5 110.682 O1 C3 H7 115.584
C2 O1 C3 106.777 C2 C4 C5 105.929
C2 C4 H8 126.321 C3 C5 C4 105.929
C3 C5 H9 126.321 C4 C2 H6 133.734
C4 C5 H9 127.750 C5 C3 H7 133.734
C5 C4 H8 127.750
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability