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 C5H8O (Furan, 2,3-dihydro-5-methyl-)

using model chemistry: HF/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 HF/3-21G*
 hartrees
Energy at 0K-267.342052
Energy at 298.15K-267.351456
Nuclear repulsion energy237.161666
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/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 3434 3100 3.72      
2 A 3312 2990 41.84      
3 A 3292 2972 13.62      
4 A 3262 2945 50.33      
5 A 3257 2940 12.33      
6 A 3247 2931 14.14      
7 A 3218 2904 39.69      
8 A 3208 2896 15.35      
9 A 1883 1699 57.53      
10 A 1688 1524 0.03      
11 A 1659 1497 1.86      
12 A 1656 1494 8.57      
13 A 1644 1484 7.31      
14 A 1583 1429 8.19      
15 A 1514 1367 3.51      
16 A 1444 1304 19.13      
17 A 1400 1263 26.42      
18 A 1384 1249 0.83      
19 A 1317 1189 2.36      
20 A 1289 1163 77.24      
21 A 1216 1098 11.56      
22 A 1182 1067 0.48      
23 A 1160 1047 15.69      
24 A 1072 967 51.60      
25 A 1047 945 7.38      
26 A 957 863 49.48      
27 A 929 839 3.70      
28 A 927 836 25.05      
29 A 878 793 13.60      
30 A 797 719 1.81      
31 A 660 596 2.46      
32 A 606 547 2.18      
33 A 343 309 3.17      
34 A 243 219 10.54      
35 A 177 160 2.13      
36 A 82 74 3.94      

Unscaled Zero Point Vibrational Energy (zpe) 28483.5 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 25709.2 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/3-21G*
ABC
0.25109 0.10788 0.07876

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.405 -0.816 -0.001
H2 1.832 -1.263 0.882
H3 1.831 -1.261 -0.885
O4 -0.033 -1.103 0.000
C5 1.529 0.744 0.000
H6 2.055 1.098 -0.877
H7 2.054 1.097 0.880
C8 0.066 1.165 -0.000
H9 -0.261 2.180 -0.001
C10 -2.203 -0.012 -0.000
H11 -2.525 -0.564 0.876
H12 -2.670 0.962 -0.002
H13 -2.525 -0.567 -0.874
C14 -0.718 0.109 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 O4 C5 H6 H7 C8 H9 C10 H11 H12 H13 C14
C11.07801.07811.46651.56432.20332.20322.39063.42773.69594.03454.44624.03322.3151
H21.07801.76732.06982.21262.95302.37023.12934.12494.31554.41345.09984.74903.0270
H31.07811.76732.06992.21252.37022.95393.12784.12324.31424.75005.09764.41063.0258
O41.46652.06982.06992.41843.15853.15702.26973.29052.42792.69563.34922.69421.3914
C51.56432.21262.21252.41841.08321.08331.52212.29493.80744.34884.20504.34912.3344
H62.20332.95302.37023.15851.08321.75712.17492.70254.48715.17864.80814.87353.0721
H72.20322.37022.95393.15701.08331.75712.17462.70284.48574.87084.80765.17763.0708
C82.39063.12933.12782.26971.52212.17492.17461.06652.55623.23612.74423.23681.3151
H93.42774.12494.12323.29052.29492.70252.70281.06652.92893.66402.70003.66552.1209
C103.69594.31554.31422.42793.80744.48714.48572.55622.92891.08411.08101.08411.4900
H114.03454.41344.75002.69564.34885.17864.87083.23613.66401.08411.76641.75002.1183
H124.44625.09985.09763.34924.20504.80814.80762.74422.70001.08101.76641.76642.1311
H134.03324.74904.41062.69424.34914.87355.17763.23683.66551.08411.75001.76642.1182
C142.31513.02703.02581.39142.33443.07213.07081.31512.12091.49002.11832.13112.1182

picture of Furan, 2,3-dihydro-5-methyl- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O4 C14 108.178 C1 C5 H6 111.362
C1 C5 H7 111.351 C1 C5 C8 101.522
H2 C1 H3 110.101 H2 C1 O4 107.891
H2 C1 C5 112.426 H3 C1 O4 107.891
H3 C1 C5 112.414 O4 C1 C5 105.828
O4 C14 C8 113.954 O4 C14 C10 114.784
C5 C8 H9 123.927 C5 C8 C14 110.518
H6 C5 H7 108.396 H6 C5 C8 112.087
H7 C5 C8 112.066 C8 C14 C10 131.262
H9 C8 C14 125.556 H11 C10 H12 109.342
H11 C10 H13 107.626 H11 C10 C14 109.752
H12 C10 H13 109.345 H12 C10 C14 110.966
H13 C10 C14 109.744
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.094 0.017    
2 H 0.220 0.070    
3 H 0.220 0.070    
4 O -0.677 -0.442    
5 C -0.476 0.296    
6 H 0.225 -0.036    
7 H 0.225 -0.036    
8 C -0.347 -0.550    
9 H 0.225 0.187    
10 C -0.631 -0.487    
11 H 0.238 0.150    
12 H 0.218 0.143    
13 H 0.238 0.151    
14 C 0.416 0.468    


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.525 1.141 -0.001 1.256
CHELPG 0.512 1.106 -0.001 1.219
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.466 -1.461 -0.000
y -1.461 -38.750 0.001
z -0.000 0.001 -37.968
Traceless
 xyz
x 6.893 -1.461 -0.000
y -1.461 -4.033 0.001
z -0.000 0.001 -2.860
Polar
3z2-r2-5.721
x2-y27.284
xy-1.461
xz-0.000
yz0.001


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.574 0.630 -0.000
y 0.630 7.553 -0.000
z -0.000 -0.000 4.966


<r2> (average value of r2) Å2
<r2> 157.528
(<r2>)1/2 12.551