return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C4H6O (Furan, 2,3-dihydro-)

using model chemistry: LSDA/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at LSDA/6-31G*
 hartrees
Energy at 0K-229.973185
Energy at 298.15K-229.980388
Nuclear repulsion energy175.251344
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 LSDA/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 A 3210 3150 2.77      
2 A 3177 3118 2.53      
3 A 3069 3012 21.10      
4 A 3030 2974 17.53      
5 A 2962 2906 52.85      
6 A 2947 2892 30.75      
7 A 1675 1644 52.23      
8 A 1470 1442 2.01      
9 A 1449 1422 1.29      
10 A 1379 1353 5.16      
11 A 1304 1280 3.17      
12 A 1265 1241 5.95      
13 A 1214 1192 23.39      
14 A 1195 1173 48.39      
15 A 1150 1129 38.68      
16 A 1089 1069 4.96      
17 A 1041 1022 3.62      
18 A 1018 999 11.29      
19 A 963 945 11.34      
20 A 945 928 32.38      
21 A 870 854 4.05      
22 A 848 832 1.88      
23 A 829 813 7.07      
24 A 686 674 33.51      
25 A 651 639 1.22      
26 A 455 446 23.92      
27 A 177 174 1.24      

Unscaled Zero Point Vibrational Energy (zpe) 20034.4 cm-1
Scaled (by 0.9813) Zero Point Vibrational Energy (zpe) 19659.8 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 LSDA/6-31G*
ABC
0.27521 0.26230 0.14327

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.784 2.184 0.136
C2 0.426 1.156 0.079
H3 2.276 -0.048 0.023
C4 1.188 0.060 0.012
O5 0.511 -1.107 -0.113
H6 -1.366 0.975 -1.123
H7 -1.708 1.181 0.609
C8 -0.999 0.727 -0.105
H9 -1.484 -1.404 -0.541
H10 -1.092 -1.035 1.174
C11 -0.865 -0.776 0.120

Atom - Atom Distances (Å)
  H1 C2 H3 C4 O5 H6 H7 C8 H9 H10 C11
H11.09002.68662.16493.31082.76882.72792.31534.29773.86773.3884
C21.09002.20811.33642.27202.16462.19901.49933.25292.88172.3240
H32.68662.20811.09322.06283.95254.21053.36804.03653.69433.2259
C42.16491.33641.09321.35502.94083.16272.28973.09672.78442.2199
O53.31082.27202.06281.35502.97923.26792.37512.06172.05761.4341
H62.76882.16463.95252.94082.97921.77771.11022.45223.06482.2057
H72.72792.19904.21053.16273.26791.77771.10422.83782.36812.1866
C82.31531.49933.36802.28972.37511.11021.10422.22792.17911.5257
H94.29773.25294.03653.09672.06172.45222.83782.22791.79731.1015
H103.86772.88173.69432.78442.05763.06482.36812.17911.79731.1089
C113.38842.32403.22592.21991.43412.20572.18661.52571.10151.1089

picture of Furan, 2,3-dihydro- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 C2 C4 126.001 H1 C2 C8 126.075
C2 C4 H3 130.422 C2 C4 O5 115.164
C2 C8 H6 111.222 C2 C8 H7 114.410
C2 C8 C11 100.387 H3 C4 O5 114.403
C4 C2 C8 107.552 C4 O5 C11 105.447
O5 C11 C8 106.686 O5 C11 H9 108.080
O5 C11 H10 107.331 H6 C8 H7 106.795
H6 C8 C11 112.649 H7 C8 C11 111.483
C8 C11 H9 115.029 C8 C11 H10 110.605
H9 C11 H10 108.798
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.156      
2 C -0.205      
3 H 0.170      
4 C 0.075      
5 O -0.383      
6 H 0.180      
7 H 0.180      
8 C -0.392      
9 H 0.183      
10 H 0.176      
11 C -0.140      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.777 0.726 0.144 1.073
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.609 1.416 0.093
y 1.416 -30.534 -0.190
z 0.093 -0.190 -30.794
Traceless
 xyz
x 4.055 1.416 0.093
y 1.416 -1.833 -0.190
z 0.093 -0.190 -2.223
Polar
3z2-r2-4.446
x2-y23.925
xy1.416
xz0.093
yz-0.190


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.135 -0.136 0.072
y -0.136 7.007 -0.004
z 0.072 -0.004 4.453


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000