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: B3PW91/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3PW91/6-31+G**
 hartrees
Energy at 0K-231.146622
Energy at 298.15K-231.153757
Nuclear repulsion energy174.132640
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 B3PW91/6-31+G**
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 3251 3121 7.33      
2 A1 3004 2884 5.65      
3 A1 1700 1632 0.13      
4 A1 1523 1462 2.31      
5 A1 1394 1339 4.91      
6 A1 1119 1074 1.39      
7 A1 1002 962 8.24      
8 A1 925 888 24.43      
9 A1 755 725 6.58      
10 A2 3025 2904 0.00      
11 A2 1223 1175 0.00      
12 A2 1057 1015 0.00      
13 A2 948 910 0.00      
14 A2 393 377 0.00      
15 B1 3027 2906 85.57      
16 B1 1178 1131 3.05      
17 B1 1024 983 20.01      
18 B1 676 649 45.18      
19 B1 98 94 10.58      
20 B2 3227 3098 2.77      
21 B2 2999 2879 152.19      
22 B2 1512 1452 0.80      
23 B2 1379 1324 3.14      
24 B2 1325 1272 0.25      
25 B2 1137 1091 103.91      
26 B2 930 893 0.28      
27 B2 810 778 1.95      

Unscaled Zero Point Vibrational Energy (zpe) 20320.4 cm-1
Scaled (by 0.9601) Zero Point Vibrational Energy (zpe) 19509.6 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 B3PW91/6-31+G**
ABC
0.26741 0.26441 0.13997

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31+G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.185
C2 0.000 1.171 0.370
C3 0.000 0.666 -1.042
C4 0.000 -0.666 -1.042
C5 0.000 -1.171 0.370
H6 0.888 1.781 0.600
H7 -0.888 1.781 0.600
H8 -0.888 -1.781 0.600
H9 0.888 -1.781 0.600
H10 0.000 1.316 -1.910
H11 0.000 -1.316 -1.910

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
O11.42712.32442.32441.42712.07402.07402.07402.07403.36353.3635
C21.42711.49952.31742.34291.10131.10133.09143.09142.28483.3745
C32.32441.49951.33242.31742.17412.17413.07773.07771.08472.1642
C42.32442.31741.33241.49953.07773.07772.17412.17412.16421.0847
C51.42712.34292.31741.49953.09143.09141.10131.10133.37452.2848
H62.07401.10132.17413.07773.09141.77623.97973.56132.70314.0842
H72.07401.10132.17413.07773.09141.77623.56133.97972.70314.0842
H82.07403.09143.07772.17411.10133.97973.56131.77624.08422.7031
H92.07403.09143.07772.17411.10133.56133.97971.77624.08422.7031
H103.36352.28481.08472.16423.37452.70312.70314.08424.08422.6322
H113.36353.37452.16421.08472.28484.08424.08422.70312.70312.6322

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 105.140 O1 C2 H6 109.552
O1 C2 H7 109.552 O1 C5 C4 105.140
O1 C5 H8 109.552 O1 C5 H9 109.552
C2 O1 C5 110.337 C2 C3 C4 109.691
C2 C3 H10 123.500 C3 C2 H6 112.533
C3 C2 H7 112.533 C3 C4 C5 109.691
C3 C4 H11 126.809 C4 C3 H10 126.809
C4 C5 H8 112.533 C4 C5 H9 112.533
C5 C4 H11 123.500 H6 C2 H7 107.493
H8 C5 H9 107.493
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.328      
2 C -0.262      
3 C -0.036      
4 C -0.036      
5 C -0.262      
6 H 0.152      
7 H 0.152      
8 H 0.152      
9 H 0.152      
10 H 0.158      
11 H 0.158      


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 -1.781 1.781
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.310 0.000 0.000
y 0.000 -25.859 0.000
z 0.000 0.000 -32.408
Traceless
 xyz
x -2.176 0.000 0.000
y 0.000 6.000 0.000
z 0.000 0.000 -3.824
Polar
3z2-r2-7.648
x2-y2-5.451
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.544 0.000 0.000
y 0.000 9.094 0.000
z 0.000 0.000 6.649


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