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

using model chemistry: CCD/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCD/3-21G
 hartrees
Energy at 0K-229.014055
Energy at 298.15K-229.021176
HF Energy-228.505140
Nuclear repulsion energy170.490840
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 CCD/3-21G
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 3230 3140 6.87      
2 A1 3034 2950 10.20      
3 A1 1679 1632 0.74      
4 A1 1607 1563 0.02      
5 A1 1388 1350 0.04      
6 A1 1168 1136 1.26      
7 A1 955 929 7.37      
8 A1 863 839 7.02      
9 A1 735 714 5.62      
10 A2 3059 2975 0.00      
11 A2 1227 1193 0.00      
12 A2 1098 1067 0.00      
13 A2 946 920 0.00      
14 A2 380 369 0.00      
15 B1 3064 2979 85.48      
16 B1 1188 1155 6.75      
17 B1 1050 1021 15.65      
18 B1 694 674 39.01      
19 B1 105 102 10.92      
20 B2 3201 3112 2.09      
21 B2 3029 2946 84.05      
22 B2 1596 1552 2.87      
23 B2 1384 1346 5.54      
24 B2 1349 1312 1.88      
25 B2 1081 1051 68.46      
26 B2 891 866 0.29      
27 B2 814 791 1.99      

Unscaled Zero Point Vibrational Energy (zpe) 20407.0 cm-1
Scaled (by 0.9723) Zero Point Vibrational Energy (zpe) 19841.8 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 CCD/3-21G
ABC
0.25659 0.25195 0.13365

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.233
C2 0.000 1.208 0.370
C3 0.000 0.669 -1.065
C4 0.000 -0.669 -1.065
C5 0.000 -1.208 0.370
H6 0.896 1.809 0.583
H7 -0.896 1.809 0.583
H8 -0.896 -1.809 0.583
H9 0.896 -1.809 0.583
H10 0.000 1.321 -1.933
H11 0.000 -1.321 -1.933

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
O11.48422.39302.39301.48422.12042.12042.12042.12043.43033.4303
C21.48421.53242.36262.41541.09971.09973.15393.15392.30583.4203
C32.39301.53241.33872.36262.19472.19473.10793.10791.08562.1715
C42.39302.36261.33871.53243.10793.10792.19472.19472.17151.0856
C51.48422.41542.36261.53243.15393.15391.09971.09973.42032.3058
H62.12041.09972.19473.10793.15391.79184.03693.61752.71524.1145
H72.12041.09972.19473.10793.15391.79183.61754.03692.71524.1145
H82.12043.15393.10792.19471.09974.03693.61751.79184.11452.7152
H92.12043.15393.10792.19471.09973.61754.03691.79184.11452.7152
H103.43032.30581.08562.17153.42032.71522.71524.11454.11452.6419
H113.43033.42032.17151.08562.30584.11454.11452.71522.71522.6419

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 104.974 O1 C2 H6 109.392
O1 C2 H7 109.392 O1 C5 C4 104.974
O1 C5 H8 109.392 O1 C5 H9 109.392
C2 O1 C5 108.918 C2 C3 C4 110.567
C2 C3 H10 122.546 C3 C2 H6 111.933
C3 C2 H7 111.933 C3 C4 C5 110.567
C3 C4 H11 126.887 C4 C3 H10 126.887
C4 C5 H8 111.933 C4 C5 H9 111.933
C5 C4 H11 122.546 H6 C2 H7 109.111
H8 C5 H9 109.111
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability