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

using model chemistry: CID/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 CID/3-21G
 hartrees
Energy at 0K-228.943193
Energy at 298.15K-228.950471
Nuclear repulsion energy171.775631
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 CID/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 3321 3094 5.61      
2 A1 3124 2910 11.15      
3 A1 1752 1632 0.78      
4 A1 1646 1534 0.04      
5 A1 1433 1335 0.15      
6 A1 1202 1119 1.42      
7 A1 983 916 7.92      
8 A1 901 840 10.75      
9 A1 759 707 6.71      
10 A2 3149 2933 0.00      
11 A2 1263 1177 0.00      
12 A2 1133 1056 0.00      
13 A2 1008 939 0.00      
14 A2 401 373 0.00      
15 B1 3154 2938 86.28      
16 B1 1226 1142 7.55      
17 B1 1083 1009 19.57      
18 B1 730 680 42.31      
19 B1 125 117 12.29      
20 B2 3291 3066 1.30      
21 B2 3118 2904 88.09      
22 B2 1634 1523 3.14      
23 B2 1424 1326 4.51      
24 B2 1390 1295 0.94      
25 B2 1124 1047 77.24      
26 B2 917 854 0.11      
27 B2 842 784 1.66      

Unscaled Zero Point Vibrational Energy (zpe) 21065.2 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 19624.4 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 CID/3-21G
ABC
0.26010 0.25610 0.13567

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.220
C2 0.000 1.200 0.370
C3 0.000 0.663 -1.057
C4 0.000 -0.663 -1.057
C5 0.000 -1.200 0.370
H6 0.890 1.797 0.582
H7 -0.890 1.797 0.582
H8 -0.890 -1.797 0.582
H9 0.890 -1.797 0.582
H10 0.000 1.310 -1.920
H11 0.000 -1.310 -1.920

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
O11.47082.37092.37091.47082.10432.10432.10432.10433.40183.4018
C21.47081.52422.34692.40081.09231.09233.13433.13432.29233.3975
C32.37091.52421.32652.34692.18272.18273.08753.08751.07852.1536
C42.37092.34691.32651.52423.08753.08752.18272.18272.15361.0785
C51.47082.40082.34691.52423.13433.13431.09231.09233.39752.2923
H62.10431.09232.18273.08753.13431.77924.01113.59492.70024.0875
H72.10431.09232.18273.08753.13431.77923.59494.01112.70024.0875
H82.10433.13433.08752.18271.09234.01113.59491.77924.08752.7002
H92.10433.13433.08752.18271.09233.59494.01111.77924.08752.7002
H103.40182.29231.07852.15363.39752.70022.70024.08754.08752.6194
H113.40183.39752.15361.07852.29234.08754.08752.70022.70022.6194

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 104.664 O1 C2 H6 109.489
O1 C2 H7 109.489 O1 C5 C4 104.664
O1 C5 H8 109.489 O1 C5 H9 109.489
C2 O1 C5 109.404 C2 C3 C4 110.634
C2 C3 H10 122.538 C3 C2 H6 112.013
C3 C2 H7 112.013 C3 C4 C5 110.634
C3 C4 H11 126.827 C4 C3 H10 126.827
C4 C5 H8 112.013 C4 C5 H9 112.013
C5 C4 H11 122.538 H6 C2 H7 109.063
H8 C5 H9 109.063
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability