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: LSDA/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 LSDA/3-21G*
 hartrees
Energy at 0K-228.717257
Energy at 298.15K-228.724271
Nuclear repulsion energy172.618466
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 LSDA/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3224 3166 1.52      
2 A 3189 3132 0.55      
3 A 3069 3014 20.70      
4 A 3026 2972 11.92      
5 A 3003 2949 25.74      
6 A 2981 2927 24.54      
7 A 1654 1624 36.81      
8 A 1503 1476 3.37      
9 A 1479 1452 1.86      
10 A 1353 1328 4.00      
11 A 1281 1258 6.50      
12 A 1269 1246 17.30      
13 A 1228 1206 10.56      
14 A 1172 1151 1.35      
15 A 1146 1126 41.23      
16 A 1059 1040 46.65      
17 A 1044 1026 0.85      
18 A 994 976 1.08      
19 A 931 915 18.52      
20 A 906 890 23.97      
21 A 904 888 9.93      
22 A 840 825 0.92      
23 A 821 806 3.30      
24 A 703 690 42.20      
25 A 690 678 12.16      
26 A 455 447 29.46      
27 A 55 54 1.16      

Unscaled Zero Point Vibrational Energy (zpe) 19988.6 cm-1
Scaled (by 0.982) Zero Point Vibrational Energy (zpe) 19628.8 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 LSDA/3-21G*
ABC
0.26604 0.25529 0.13739

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.948 2.131 0.051
C2 0.528 1.128 0.030
H3 2.288 -0.188 0.011
C4 1.212 -0.017 0.005
O5 0.450 -1.173 -0.042
H6 -1.395 1.186 -0.988
H7 -1.517 1.274 0.795
C8 -0.952 0.823 -0.040
H9 -1.513 -1.201 -0.782
H10 -1.363 -1.077 1.011
C11 -0.963 -0.724 0.045

Atom - Atom Distances (Å)
  H1 C2 H3 C4 O5 H6 H7 C8 H9 H10 C11
H11.08692.67862.16463.34212.73102.71342.30794.22504.06853.4354
C21.08692.19761.33432.30352.17642.18861.51283.20193.06652.3782
H32.67862.19761.08922.08554.05544.15103.39424.01263.88803.2947
C42.16461.33431.08921.38513.03783.12102.32183.07372.96082.2874
O53.34212.30352.08551.38513.14033.24932.43902.09822.09841.4849
H62.73102.17644.05543.03783.14031.78921.10712.39893.01972.2138
H72.71342.18864.15103.12103.24931.78921.10492.93512.36672.2057
C82.30791.51283.39422.32182.43901.10711.10492.22772.21041.5498
H94.22503.20194.01263.07372.09822.39892.93512.22771.80341.1013
H104.06853.06653.88802.96082.09843.01972.36672.21041.80341.1040
C113.43542.37823.29472.28741.48492.21382.20571.54981.10131.1040

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 126.462 H1 C2 C8 124.371
C2 C4 H3 129.863 C2 C4 O5 115.778
C2 C8 H6 111.406 C2 C8 H7 112.523
C2 C8 C11 101.879 H3 C4 O5 114.359
C4 C2 C8 109.112 C4 O5 C11 105.640
O5 C11 C8 106.954 O5 C11 H9 107.525
O5 C11 H10 107.388 H6 C8 H7 107.974
H6 C8 C11 111.785 H7 C8 C11 111.272
C8 C11 H9 113.256 C8 C11 H10 111.699
H9 C11 H10 109.724
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.200      
2 C -0.262      
3 H 0.234      
4 C 0.050      
5 O -0.423      
6 H 0.232      
7 H 0.231      
8 C -0.491      
9 H 0.237      
10 H 0.235      
11 C -0.243      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.910 0.941 0.066 1.310
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.075 1.364 0.051
y 1.364 -31.126 -0.074
z 0.051 -0.074 -31.093
Traceless
 xyz
x 5.034 1.364 0.051
y 1.364 -2.542 -0.074
z 0.051 -0.074 -2.492
Polar
3z2-r2-4.983
x2-y25.051
xy1.364
xz0.051
yz-0.074


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.687 -0.103 0.025
y -0.103 6.686 0.003
z 0.025 0.003 3.823


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