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, 2,5-dihydro-)

using model chemistry: HF/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/6-311+G(3df,2p)
 hartrees
Energy at 0K-229.868810
Energy at 298.15K-229.876283
Nuclear repulsion energy175.966590
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 HF/6-311+G(3df,2p)
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 3368 3060 8.04      
2 A1 3149 2861 9.74      
3 A1 1824 1657 0.06      
4 A1 1658 1507 1.14      
5 A1 1536 1395 8.64      
6 A1 1210 1100 0.57      
7 A1 1052 956 22.32      
8 A1 1012 919 17.01      
9 A1 811 737 7.79      
10 A2 3163 2874 0.00      
11 A2 1335 1213 0.00      
12 A2 1167 1061 0.00      
13 A2 1065 968 0.00      
14 A2 430 391 0.00      
15 B1 3166 2877 99.62      
16 B1 1304 1185 0.51      
17 B1 1135 1031 30.28      
18 B1 756 687 42.68      
19 B1 134 122 10.92      
20 B2 3342 3036 5.29      
21 B2 3144 2856 170.32      
22 B2 1648 1497 1.53      
23 B2 1503 1366 8.85      
24 B2 1452 1319 1.14      
25 B2 1257 1143 136.95      
26 B2 980 890 0.16      
27 B2 877 797 1.61      

Unscaled Zero Point Vibrational Energy (zpe) 21738.2 cm-1
Scaled (by 0.9086) Zero Point Vibrational Energy (zpe) 19751.3 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 HF/6-311+G(3df,2p)
ABC
0.27360 0.26874 0.14270

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-311+G(3df,2p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.166
C2 0.000 1.160 0.376
C3 0.000 0.655 -1.038
C4 0.000 -0.655 -1.038
C5 0.000 -1.160 0.376
H6 0.877 1.760 0.602
H7 -0.877 1.760 0.602
H8 -0.877 -1.760 0.602
H9 0.877 -1.760 0.602
H10 0.000 1.300 -1.894
H11 0.000 -1.300 -1.894

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
O11.40362.29862.29861.40362.04572.04572.04572.04573.32443.3244
C21.40361.50102.30102.32061.08641.08643.05743.05742.27423.3474
C32.29861.50101.31072.30102.16262.16263.04793.04791.07192.1346
C42.29862.30101.31071.50103.04793.04792.16262.16262.13461.0719
C51.40362.32062.30101.50103.05743.05741.08641.08643.34742.2742
H62.04571.08642.16263.04793.05741.75483.93283.51962.68514.0448
H72.04571.08642.16263.04793.05741.75483.51963.93282.68514.0448
H82.04573.05743.04792.16261.08643.93283.51961.75484.04482.6851
H92.04573.05743.04792.16261.08643.51963.93281.75484.04482.6851
H103.32442.27421.07192.13463.34742.68512.68514.04484.04482.5998
H113.32443.34742.13461.07192.27424.04484.04482.68512.68512.5998

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 104.580 O1 C2 H6 109.832
O1 C2 H7 109.832 O1 C5 C4 104.580
O1 C5 H8 109.832 O1 C5 H9 109.832
C2 O1 C5 111.520 C2 C3 C4 109.660
C2 C3 H10 123.377 C3 C2 H6 112.417
C3 C2 H7 112.417 C3 C4 C5 109.660
C3 C4 H11 126.963 C4 C3 H10 126.963
C4 C5 H8 112.417 C4 C5 H9 112.417
C5 C4 H11 123.377 H6 C2 H7 107.735
H8 C5 H9 107.735
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.972      
2 C 0.220      
3 C -0.105      
4 C -0.105      
5 C 0.220      
6 H 0.115      
7 H 0.115      
8 H 0.115      
9 H 0.115      
10 H 0.140      
11 H 0.140      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -1.680 1.680
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.388 0.000 0.000
y 0.000 -26.008 0.000
z 0.000 0.000 -32.394
Traceless
 xyz
x -2.188 0.000 0.000
y 0.000 5.883 0.000
z 0.000 0.000 -3.696
Polar
3z2-r2-7.392
x2-y2-5.381
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.603 0.000 0.000
y 0.000 8.688 0.000
z 0.000 0.000 6.552


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