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 (2H-Pyran, 3,4-dihydro-)

using model chemistry: wB97X-D/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at wB97X-D/aug-cc-pVTZ
 hartrees
Energy at 0K-270.557232
Energy at 298.15K-270.567215
HF Energy-270.557232
Nuclear repulsion energy242.277446
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 wB97X-D/aug-cc-pVTZ
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 3225 3085 19.53      
2 A 3203 3064 1.28      
3 A 3134 2998 32.29      
4 A 3119 2983 35.60      
5 A 3085 2951 32.56      
6 A 3065 2932 15.02      
7 A 3039 2907 38.07      
8 A 3025 2894 40.77      
9 A 1737 1662 91.00      
10 A 1505 1440 3.87      
11 A 1496 1431 7.26      
12 A 1484 1420 2.36      
13 A 1450 1387 3.62      
14 A 1414 1353 2.17      
15 A 1380 1320 1.83      
16 A 1366 1306 4.45      
17 A 1315 1258 1.77      
18 A 1297 1241 100.88      
19 A 1264 1210 10.52      
20 A 1220 1167 2.37      
21 A 1122 1074 71.93      
22 A 1110 1062 10.36      
23 A 1078 1031 11.72      
24 A 1050 1005 3.02      
25 A 974 931 1.70      
26 A 961 919 14.64      
27 A 918 878 22.21      
28 A 893 854 1.94      
29 A 860 823 3.60      
30 A 768 735 7.58      
31 A 743 710 27.24      
32 A 521 498 5.40      
33 A 503 482 2.12      
34 A 452 433 13.14      
35 A 283 271 0.57      
36 A 174 166 2.51      

Unscaled Zero Point Vibrational Energy (zpe) 27116.6 cm-1
Scaled (by 0.9566) Zero Point Vibrational Energy (zpe) 25939.7 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 wB97X-D/aug-cc-pVTZ
ABC
0.17477 0.16021 0.09112

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/aug-cc-pVTZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.717 1.771 -0.196
C2 0.929 1.041 -0.081
H3 -0.603 2.416 0.095
C4 -0.350 1.367 0.063
H5 -2.270 0.626 -0.511
H6 -1.837 0.254 1.140
C7 -1.434 0.331 0.126
H8 -0.772 -1.032 -1.411
H9 -1.534 -1.838 -0.042
C10 -0.875 -1.016 -0.324
H11 0.937 -2.177 -0.000
H12 0.422 -1.195 1.386
C13 0.494 -1.228 0.294
O14 1.420 -0.224 -0.116

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 H6 C7 H8 H9 C10 H11 H12 C13 O14
H11.08072.42572.12234.16064.08903.47983.94044.85993.80864.02863.60253.27572.0184
C21.08072.06571.32723.25423.12402.47592.99293.78892.74693.21882.72222.34061.3578
H32.42572.06571.08032.52042.70072.24503.76614.35763.46884.84523.97023.81103.3329
C42.12231.32721.08032.13652.14721.50052.84613.41822.47053.77022.98522.73822.3866
H54.16063.25422.52042.13651.74741.09172.40882.61482.16324.29013.76423.42463.8080
H64.08903.12402.70072.14721.74741.09393.04842.42232.16393.86032.69532.88863.5236
C73.47982.47592.24501.50051.09171.09392.15812.17851.52693.45392.71412.48562.9183
H83.94042.99293.76612.84612.40883.04842.15811.76141.09142.49443.04592.13272.6714
H94.85993.78894.35763.41822.61482.42232.17851.76141.09042.49412.50632.14403.3672
C103.80862.74693.46882.47052.16322.16391.52691.09141.09042.17612.15451.51712.4374
H114.02863.21884.84523.77024.29013.86033.45392.49442.49412.17611.77511.08772.0149
H123.60252.72223.97022.98523.76422.69532.71413.04592.50632.15451.77511.09502.0484
C133.27572.34063.81102.73823.42462.88862.48562.13272.14401.51711.08771.09501.4264
O142.01841.35783.33292.38663.80803.52362.91832.67143.36722.43742.01492.04841.4264

picture of 2H-Pyran, 3,4-dihydro- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 C2 C4 123.306 H1 C2 O14 111.225
C2 C4 H3 117.830 C2 C4 C7 122.113
C2 O14 C13 114.405 H3 C4 C7 120.013
C4 C2 O14 125.467 C4 C7 H5 110.016
C4 C7 H6 110.734 C4 C7 C10 109.376
H5 C7 H6 106.167 H5 C7 C10 110.294
H6 C7 C10 110.217 C7 C10 H8 109.908
C7 C10 H9 111.599 C7 C10 C13 109.480
H8 C10 H9 107.670 H8 C10 C13 108.586
H9 C10 C13 109.536 C10 C13 H11 112.274
C10 C13 H12 110.088 C10 C13 O14 111.759
H11 C13 H12 108.831 H11 C13 O14 105.751
H12 C13 O14 107.944
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.746      
2 C -0.278      
3 H 0.207      
4 C -0.680      
5 H 0.252      
6 H 0.242      
7 C -0.202      
8 H 0.235      
9 H 0.265      
10 C -0.407      
11 H 0.280      
12 H 0.288      
13 C -0.265      
14 O -0.683      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.233 -0.552 0.275 1.379
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -37.882 0.939 0.167
y 0.939 -33.966 -0.546
z 0.167 -0.546 -37.814
Traceless
 xyz
x -1.991 0.939 0.167
y 0.939 3.882 -0.546
z 0.167 -0.546 -1.890
Polar
3z2-r2-3.781
x2-y2-3.915
xy0.939
xz0.167
yz-0.546


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 10.144 -0.213 -0.119
y -0.213 9.811 -0.042
z -0.119 -0.042 7.604


<r2> (average value of r2) Å2
<r2> 140.179
(<r2>)1/2 11.840