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All results from a given calculation for C4H4O (Furan)

using model chemistry: QCISD/6-311G**

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/6-311G**
 hartrees
Energy at 0K-229.452801
Energy at 298.15K-229.457545
Nuclear repulsion energy160.580382
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/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 3309 3157 0.04      
2 A1 3280 3129 0.53      
3 A1 1548 1477 22.72      
4 A1 1433 1367 2.84      
5 A1 1173 1120 0.22      
6 A1 1099 1048 18.05      
7 A1 1022 975 39.07      
8 A1 888 848 13.50      
9 A2 829 790 0.00      
10 A2 738 704 0.00      
11 A2 582 555 0.00      
12 B1 848 809 0.60      
13 B1 766 731 96.04      
14 B1 611 583 26.08      
15 B2 3302 3150 2.51      
16 B2 3268 3118 2.36      
17 B2 1622 1547 0.20      
18 B2 1294 1235 0.42      
19 B2 1238 1181 25.54      
20 B2 1074 1024 0.42      
21 B2 890 849 0.40      

Unscaled Zero Point Vibrational Energy (zpe) 15405.2 cm-1
Scaled (by 0.9541) Zero Point Vibrational Energy (zpe) 14698.1 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/6-311G**
ABC
0.31512 0.30777 0.15570

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.163
C2 0.000 1.093 0.348
C3 0.000 -1.093 0.348
C4 0.000 0.723 -0.961
C5 0.000 -0.723 -0.961
H6 0.000 2.049 0.848
H7 0.000 -2.049 0.848
H8 0.000 1.382 -1.818
H9 0.000 -1.382 -1.818

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9
O11.36311.36312.24382.24382.07312.07313.28553.2855
C21.36312.18511.36052.23811.07963.18132.18483.2885
C31.36312.18512.23811.36053.18131.07963.28852.1848
C42.24381.36052.23811.44532.24393.31031.08092.2724
C52.24382.23811.36051.44533.31032.24392.27241.0809
H62.07311.07963.18132.24393.31034.09822.74834.3454
H72.07313.18131.07963.31032.24394.09824.34542.7483
H83.28552.18483.28851.08092.27242.74834.34542.7646
H93.28553.28852.18482.27241.08094.34542.74832.7646

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 110.944 O1 C2 H6 115.651
O1 C3 C5 110.944 O1 C3 H7 115.651
C2 O1 C3 106.557 C2 C4 C5 105.778
C2 C4 H8 126.612 C3 C5 C4 105.778
C3 C5 H9 126.612 C4 C2 H6 133.406
C4 C5 H9 127.610 C5 C3 H7 133.406
C5 C4 H8 127.610
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability