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: B3LYP/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3LYP/CEP-121G
 hartrees
Energy at 0K-42.087494
Energy at 298.15K-42.094650
Nuclear repulsion energy92.171060
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/CEP-121G
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 3206 3124 17.57      
2 A1 2981 2905 12.21      
3 A1 1649 1607 0.07      
4 A1 1535 1496 1.62      
5 A1 1369 1334 1.35      
6 A1 1122 1094 1.48      
7 A1 978 953 8.57      
8 A1 848 827 15.14      
9 A1 729 711 6.63      
10 A2 3018 2941 0.00      
11 A2 1185 1155 0.00      
12 A2 1060 1033 0.00      
13 A2 964 939 0.00      
14 A2 388 378 0.00      
15 B1 3022 2945 123.20      
16 B1 1143 1114 9.52      
17 B1 1024 998 16.72      
18 B1 696 678 50.49      
19 B1 123 120 14.32      
20 B2 3175 3094 5.56      
21 B2 2976 2900 158.33      
22 B2 1524 1486 0.31      
23 B2 1355 1320 1.50      
24 B2 1324 1291 1.00      
25 B2 1056 1029 80.91      
26 B2 915 892 0.91      
27 B2 794 774 3.68      

Unscaled Zero Point Vibrational Energy (zpe) 20079.5 cm-1
Scaled (by 0.9745) Zero Point Vibrational Energy (zpe) 19567.5 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/CEP-121G
ABC
0.25481 0.25442 0.13381

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-121G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.222
C2 0.000 1.212 0.367
C3 0.000 0.676 -1.060
C4 0.000 -0.676 -1.060
C5 0.000 -1.212 0.367
H6 0.893 1.812 0.600
H7 -0.893 1.812 0.600
H8 -0.893 -1.812 0.600
H9 0.893 -1.812 0.600
H10 0.000 1.321 -1.933
H11 0.000 -1.321 -1.933

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
O11.48312.38012.38011.48312.11382.11382.11382.11383.42103.4210
C21.48311.52422.36602.42331.10091.10093.16113.16112.30283.4214
C32.38011.52421.35142.36602.20042.20043.12063.12061.08602.1795
C42.38012.36601.35141.52423.12063.12062.20042.20042.17951.0860
C51.48312.42332.36601.52423.16113.16111.10091.10093.42142.3028
H62.11381.10092.20043.12063.16111.78654.03993.62342.73004.1264
H72.11381.10092.20043.12063.16111.78653.62344.03992.73004.1264
H82.11383.16113.12062.20041.10094.03993.62341.78654.12642.7300
H92.11383.16113.12062.20041.10093.62344.03991.78654.12642.7300
H103.42102.30281.08602.17953.42142.73002.73004.12644.12642.6423
H113.42103.42142.17951.08602.30284.12644.12642.73002.73002.6423

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 104.633 O1 C2 H6 108.875
O1 C2 H7 108.875 O1 C5 C4 104.633
O1 C5 H8 108.875 O1 C5 H9 108.875
C2 O1 C5 109.559 C2 C3 C4 110.588
C2 C3 H10 122.946 C3 C2 H6 112.914
C3 C2 H7 112.914 C3 C4 C5 110.588
C3 C4 H11 126.466 C4 C3 H10 126.466
C4 C5 H8 112.914 C4 C5 H9 112.914
C5 C4 H11 122.946 H6 C2 H7 108.460
H8 C5 H9 108.460
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.284      
2 C -0.230      
3 C -0.087      
4 C -0.087      
5 C -0.230      
6 H 0.146      
7 H 0.146      
8 H 0.146      
9 H 0.146      
10 H 0.166      
11 H 0.166      


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 -2.196 2.196
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.407 0.000 0.000
y 0.000 -25.370 0.000
z 0.000 0.000 -33.384
Traceless
 xyz
x -2.030 0.000 0.000
y 0.000 7.025 0.000
z 0.000 0.000 -4.996
Polar
3z2-r2-9.991
x2-y2-6.037
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.892 0.000 0.000
y 0.000 9.288 0.000
z 0.000 0.000 6.390


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