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All results from a given calculation for C4H6O (Furan, 2,5-dihydro-)

using model chemistry: QCISD/6-31G(2df,p)

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/6-31G(2df,p)
 hartrees
Energy at 0K-230.687639
Energy at 298.15K-230.694776
HF Energy-229.811134
Nuclear repulsion energy174.288742
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/6-31G(2df,p)
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 3280 3108 6.01      
2 A1 3046 2886 8.31      
3 A1 1710 1620 0.28      
4 A1 1566 1484 0.45      
5 A1 1432 1356 5.59      
6 A1 1135 1075 1.04      
7 A1 1015 962 9.28      
8 A1 947 897 14.33      
9 A1 761 721 6.67      
10 A2 3069 2907 0.00      
11 A2 1255 1189 0.00      
12 A2 1079 1022 0.00      
13 A2 962 912 0.00      
14 A2 387 367 0.00      
15 B1 3071 2910 85.63      
16 B1 1208 1145 1.47      
17 B1 1053 998 18.09      
18 B1 697 660 26.27      
19 B1 71 67 6.99      
20 B2 3255 3084 1.38      
21 B2 3040 2880 122.51      
22 B2 1554 1472 3.49      
23 B2 1400 1326 2.18      
24 B2 1351 1280 0.00      
25 B2 1173 1111 104.24      
26 B2 942 892 0.01      
27 B2 817 774 1.84      

Unscaled Zero Point Vibrational Energy (zpe) 20637.2 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 19551.7 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/6-31G(2df,p)
ABC
0.26878 0.26366 0.14009

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.185
C2 0.000 1.168 0.373
C3 0.000 0.665 -1.045
C4 0.000 -0.665 -1.045
C5 0.000 -1.168 0.373
H6 0.886 1.776 0.598
H7 -0.886 1.776 0.598
H8 -0.886 -1.776 0.598
H9 0.886 -1.776 0.598
H10 0.000 1.319 -1.906
H11 0.000 -1.319 -1.906

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
O11.42212.32752.32751.42212.06992.06992.06992.06993.36123.3612
C21.42211.50492.31752.33511.09811.09813.08253.08252.28473.3733
C32.32751.50491.33012.31752.17282.17283.07363.07361.08122.1627
C42.32752.31751.33011.50493.07363.07362.17282.17282.16271.0812
C51.42212.33512.31751.50493.08253.08251.09811.09813.37332.2847
H62.06991.09812.17283.07363.08251.77143.97003.55282.69594.0791
H72.06991.09812.17283.07363.08251.77143.55283.97002.69594.0791
H82.06993.08253.07362.17281.09813.97003.55281.77144.07912.6959
H92.06993.08253.07362.17281.09813.55283.97001.77144.07912.6959
H103.36122.28471.08122.16273.37332.69592.69594.07914.07912.6376
H113.36123.37332.16271.08122.28474.07914.07912.69592.69592.6376

picture of Furan, 2,5-dihydro- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 105.310 O1 C2 H6 109.766
O1 C2 H7 109.766 O1 C5 C4 105.310
O1 C5 H8 109.766 O1 C5 H9 109.766
C2 O1 C5 110.368 C2 C3 C4 109.506
C2 C3 H10 123.290 C3 C2 H6 112.231
C3 C2 H7 112.231 C3 C4 C5 109.506
C3 C4 H11 127.204 C4 C3 H10 127.204
C4 C5 H8 112.231 C4 C5 H9 112.231
C5 C4 H11 123.290 H6 C2 H7 107.524
H8 C5 H9 107.524
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability