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/STO-3G

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/STO-3G
 hartrees
Energy at 0K-226.928295
Energy at 298.15K-226.935547
Nuclear repulsion energy173.067443
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/STO-3G
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 3772 3080 2.08      
2 A1 3544 2894 0.34      
3 A1 2046 1671 0.56      
4 A1 1836 1499 0.00      
5 A1 1657 1353 4.21      
6 A1 1292 1055 0.02      
7 A1 1164 950 1.37      
8 A1 1099 898 0.16      
9 A1 847 692 1.19      
10 A2 3643 2974 0.00      
11 A2 1399 1142 0.00      
12 A2 1220 996 0.00      
13 A2 1150 939 0.00      
14 A2 441 360 0.00      
15 B1 3646 2977 11.58      
16 B1 1374 1122 0.46      
17 B1 1183 966 17.44      
18 B1 819 669 11.05      
19 B1 85 69 7.23      
20 B2 3732 3047 32.58      
21 B2 3540 2891 15.56      
22 B2 1826 1491 8.66      
23 B2 1617 1320 1.44      
24 B2 1544 1261 1.25      
25 B2 1426 1165 27.11      
26 B2 1090 890 0.01      
27 B2 923 754 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 23957.5 cm-1
Scaled (by 0.8165) Zero Point Vibrational Energy (zpe) 19561.3 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/STO-3G
ABC
0.26965 0.25482 0.13777

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.222
C2 0.000 1.169 0.372
C3 0.000 0.653 -1.062
C4 0.000 -0.653 -1.062
C5 0.000 -1.169 0.372
H6 0.885 1.784 0.585
H7 -0.885 1.784 0.585
H8 -0.885 -1.784 0.585
H9 0.885 -1.784 0.585
H10 0.000 1.318 -1.914
H11 0.000 -1.318 -1.914

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
O11.44552.37542.37541.44552.09072.09072.09072.09073.40123.4012
C21.44551.52422.31852.33841.09821.09823.09033.09032.29043.3778
C32.37541.52421.30532.31852.18532.18533.07133.07131.08072.1467
C42.37542.31851.30531.52423.07133.07132.18532.18532.14671.0807
C51.44552.33842.31851.52423.09033.09031.09821.09823.37782.2904
H62.09071.09822.18533.07133.09031.76923.98273.56812.69134.0803
H72.09071.09822.18533.07133.09031.76923.56813.98272.69134.0803
H82.09073.09033.07132.18531.09823.98273.56811.76924.08032.6913
H92.09073.09033.07132.18531.09823.56813.98271.76924.08032.6913
H103.40122.29041.08072.14673.37782.69132.69134.08034.08032.6360
H113.40123.37782.14671.08072.29044.08034.08032.69132.69132.6360

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 106.205 O1 C2 H6 109.801
O1 C2 H7 109.801 O1 C5 C4 106.205
O1 C5 H8 109.801 O1 C5 H9 109.801
C2 O1 C5 107.968 C2 C3 C4 109.810
C2 C3 H10 122.186 C3 C2 H6 111.862
C3 C2 H7 111.862 C3 C4 C5 109.810
C3 C4 H11 128.004 C4 C3 H10 128.004
C4 C5 H8 111.862 C4 C5 H9 111.862
C5 C4 H11 122.186 H6 C2 H7 107.318
H8 C5 H9 107.318
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.248      
2 C 0.004      
3 C -0.073      
4 C -0.073      
5 C 0.004      
6 H 0.061      
7 H 0.061      
8 H 0.061      
9 H 0.061      
10 H 0.071      
11 H 0.071      


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 -1.546 1.546
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.452 0.000 0.000
y 0.000 -25.415 0.000
z 0.000 0.000 -30.174
Traceless
 xyz
x -0.658 0.000 0.000
y 0.000 3.898 0.000
z 0.000 0.000 -3.240
Polar
3z2-r2-6.481
x2-y2-3.037
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.943 0.000 0.000
y 0.000 5.245 0.000
z 0.000 0.000 3.062


<r2> (average value of r2) Å2
<r2> 94.181
(<r2>)1/2 9.705