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: B3LYP/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B3LYP/3-21G
 hartrees
Energy at 0K-229.955232
Energy at 298.15K-229.962336
Nuclear repulsion energy171.611091
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 B3LYP/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A 3287 3172 5.02      
2 A 3258 3143 1.25      
3 A 3141 3031 36.13      
4 A 3091 2983 39.19      
5 A 3084 2976 10.52      
6 A 3056 2948 31.41      
7 A 1675 1616 36.71      
8 A 1570 1515 0.36      
9 A 1546 1492 0.33      
10 A 1397 1348 1.82      
11 A 1331 1285 10.09      
12 A 1306 1260 13.23      
13 A 1281 1236 0.67      
14 A 1206 1164 1.67      
15 A 1179 1137 20.79      
16 A 1081 1043 0.18      
17 A 1046 1009 78.55      
18 A 984 950 1.33      
19 A 946 913 2.55      
20 A 910 878 19.19      
21 A 892 861 30.44      
22 A 840 810 0.78      
23 A 836 807 1.29      
24 A 735 710 46.63      
25 A 703 679 3.30      
26 A 456 440 26.84      
27 A 69 67 1.95      

Unscaled Zero Point Vibrational Energy (zpe) 20454.5 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 19736.5 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 B3LYP/3-21G
ABC
0.26149 0.25277 0.13513

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -1.095 2.058 0.000
C2 -0.612 1.094 0.000
H3 -2.272 -0.331 0.000
C4 -1.219 -0.092 0.000
O5 -0.375 -1.210 -0.000
H6 1.374 1.332 0.888
H7 1.373 1.332 -0.889
C8 0.903 0.896 -0.000
H9 1.520 -1.048 0.895
H10 1.521 -1.049 -0.894
C11 1.025 -0.668 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 O5 H6 H7 C8 H9 H10 C11
H11.07782.66342.15363.34652.72192.72192.31164.15814.15873.4530
C21.07782.18731.33232.31652.18872.18861.52883.15293.15352.4053
H32.66342.18731.07912.09034.10434.10383.40373.96193.96243.3137
C42.15361.33231.07911.40123.08893.08852.34123.03703.03752.3170
O53.34652.31652.09031.40123.21123.21072.46352.10282.10281.5014
H62.72192.18874.10433.08893.21121.77671.09582.38492.97772.2159
H72.72192.18864.10383.08853.21071.77671.09582.97812.38502.2159
C82.31161.52883.40372.34122.46351.09581.09582.22732.22741.5681
H94.15813.15293.96193.03702.10282.38492.97812.22731.78971.0916
H104.15873.15353.96243.03752.10282.97772.38502.22741.78971.0916
C113.45302.40533.31372.31701.50142.21592.21591.56811.09161.0916

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 126.324 H1 C2 C8 124.040
C2 C4 H3 129.909 C2 C4 O5 115.850
C2 C8 H6 111.950 C2 C8 H7 111.942
C2 C8 C11 101.909 H3 C4 O5 114.241
C4 C2 C8 109.636 C4 O5 C11 105.874
O5 C11 C8 106.730 O5 C11 H9 107.324
O5 C11 H10 107.324 H6 C8 H7 108.326
H6 C8 C11 111.337 H7 C8 C11 111.336
C8 C11 H9 112.503 C8 C11 H10 112.509
H9 C11 H10 110.122
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.181     0.150
2 C -0.261     -0.355
3 H 0.214     0.150
4 C 0.114     0.032
5 O -0.484     -0.315
6 H 0.207     -0.008
7 H 0.207     -0.008
8 C -0.437     0.183
9 H 0.210     0.062
10 H 0.210     0.062
11 C -0.161     0.049


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.809 1.155 0.000 1.410
CHELPG        
AIM        
ESP 0.841 1.103 0.000 1.387


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.582 0.149 -0.001
y 0.149 6.644 -0.001
z -0.001 -0.001 3.714


<r2> (average value of r2) Å2
<r2> 96.438
(<r2>)1/2 9.820