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All results from a given calculation for C4H4O (Furan)

using model chemistry: MP3/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP3/6-31G*
 hartrees
Energy at 0K-229.326265
Energy at 298.15K-229.330985
HF Energy-228.623279
Nuclear repulsion energy160.791172
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 MP3/6-31G*
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 3351 3145 0.00      
2 A1 3321 3118 0.51      
3 A1 1581 1484 23.08      
4 A1 1468 1378 4.44      
5 A1 1201 1128 0.28      
6 A1 1121 1052 17.54      
7 A1 1049 985 40.11      
8 A1 900 845 16.37      
9 A2 800 751 0.00      
10 A2 725 681 0.00      
11 A2 583 547 0.00      
12 B1 821 770 0.09      
13 B1 763 717 91.72      
14 B1 618 580 25.97      
15 B2 3345 3139 2.16      
16 B2 3310 3107 1.99      
17 B2 1664 1562 0.17      
18 B2 1329 1248 3.51      
19 B2 1275 1197 28.50      
20 B2 1105 1037 0.43      
21 B2 903 848 0.31      

Unscaled Zero Point Vibrational Energy (zpe) 15617.9 cm-1
Scaled (by 0.9386) Zero Point Vibrational Energy (zpe) 14659.0 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 MP3/6-31G*
ABC
0.31580 0.30891 0.15616

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.162
C2 0.000 1.093 0.346
C3 0.000 -1.093 0.346
C4 0.000 0.719 -0.959
C5 0.000 -0.719 -0.959
H6 0.000 2.050 0.846
H7 0.000 -2.050 0.846
H8 0.000 1.376 -1.817
H9 0.000 -1.376 -1.817

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9
O11.36381.36382.23922.23922.07382.07383.28093.2809
C21.36382.18641.35782.23341.07903.18232.18143.2828
C31.36382.18642.23341.35783.18231.07903.28282.1814
C42.23921.35782.23341.43832.24223.30501.08052.2641
C52.23922.23341.35781.43833.30502.24222.26411.0805
H62.07381.07903.18232.24223.30504.09922.74644.3388
H72.07383.18231.07903.30502.24224.09924.33882.7464
H83.28092.18143.28281.08052.26412.74644.33882.7524
H93.28093.28282.18142.26411.08054.33882.74642.7524

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 110.724 O1 C2 H6 115.704
O1 C3 C5 110.724 O1 C3 H7 115.704
C2 O1 C3 106.568 C2 C4 C5 105.992
C2 C4 H8 126.557 C3 C5 C4 105.992
C3 C5 H9 126.557 C4 C2 H6 133.572
C4 C5 H9 127.451 C5 C3 H7 133.572
C5 C4 H8 127.451
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability