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

using model chemistry: QCISD/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-230.573372
Energy at 298.15K-230.580388
HF Energy-229.801512
Nuclear repulsion energy173.516617
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/6-31+G**
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 3297 3117 8.68      
2 A1 3079 2911 5.52      
3 A1 1714 1621 0.07      
4 A1 1581 1494 0.82      
5 A1 1434 1356 8.22      
6 A1 1145 1082 0.77      
7 A1 1016 961 9.12      
8 A1 923 873 21.69      
9 A1 757 716 6.85      
10 A2 3110 2940 0.00      
11 A2 1241 1173 0.00      
12 A2 1086 1027 0.00      
13 A2 933 882 0.00      
14 A2 376 355 0.00      
15 B1 3111 2941 79.85      
16 B1 1194 1128 2.22      
17 B1 1058 1000 24.41      
18 B1 679 642 42.45      
19 B1 26 25 12.10      
20 B2 3273 3095 3.56      
21 B2 3075 2907 133.34      
22 B2 1572 1486 3.46      
23 B2 1414 1337 1.95      
24 B2 1363 1289 0.01      
25 B2 1151 1089 103.07      
26 B2 950 898 0.30      
27 B2 815 770 2.07      

Unscaled Zero Point Vibrational Energy (zpe) 20686.4 cm-1
Scaled (by 0.9454) Zero Point Vibrational Energy (zpe) 19556.9 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/6-31+G**
ABC
0.26495 0.26263 0.13879

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.191
C2 0.000 1.181 0.370
C3 0.000 0.669 -1.046
C4 0.000 -0.669 -1.046
C5 0.000 -1.181 0.370
H6 0.887 1.780 0.601
H7 -0.887 1.780 0.601
H8 -0.887 -1.780 0.601
H9 0.887 -1.780 0.601
H10 0.000 1.315 -1.912
H11 0.000 -1.315 -1.912

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
O11.43822.33452.33451.43822.07442.07442.07442.07443.37023.3702
C21.43821.50562.32922.36171.09511.09513.09933.09932.28593.3821
C32.33451.50561.33732.32922.17542.17543.08103.08101.08102.1649
C42.33452.32921.33731.50563.08103.08102.17542.17542.16491.0810
C51.43822.36172.32921.50563.09933.09931.09511.09513.38212.2859
H62.07441.09512.17543.08103.09931.77473.97733.55942.70484.0842
H72.07441.09512.17543.08103.09931.77473.55943.97732.70484.0842
H82.07443.09933.08102.17541.09513.97733.55941.77474.08422.7048
H92.07443.09933.08102.17541.09513.55943.97731.77474.08422.7048
H103.37022.28591.08102.16493.38212.70482.70484.08424.08422.6308
H113.37023.38212.16491.08102.28594.08424.08422.70482.70482.6308

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 104.917 O1 C2 H6 109.195
O1 C2 H7 109.195 O1 C5 C4 104.917
O1 C5 H8 109.195 O1 C5 H9 109.195
C2 O1 C5 110.387 C2 C3 C4 109.889
C2 C3 H10 123.364 C3 C2 H6 112.589
C3 C2 H7 112.589 C3 C4 C5 109.889
C3 C4 H11 126.747 C4 C3 H10 126.747
C4 C5 H8 112.589 C4 C5 H9 112.589
C5 C4 H11 123.364 H6 C2 H7 108.250
H8 C5 H9 108.250
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability