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: B3PW91/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B3PW91/cc-pVDZ
 hartrees
Energy at 0K-270.461402
Energy at 298.15K-270.471333
Nuclear repulsion energy241.088864
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/cc-pVDZ
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 3217 3104 21.42      
2 A 3195 3083 1.92      
3 A 3120 3011 33.79      
4 A 3107 2998 33.41      
5 A 3067 2959 37.10      
6 A 3050 2943 11.78      
7 A 3017 2911 49.19      
8 A 3012 2906 37.88      
9 A 1731 1670 78.79      
10 A 1475 1424 3.30      
11 A 1459 1408 4.86      
12 A 1444 1394 1.89      
13 A 1418 1369 4.40      
14 A 1387 1339 5.95      
15 A 1365 1317 1.66      
16 A 1335 1288 4.84      
17 A 1292 1246 2.54      
18 A 1273 1228 103.14      
19 A 1251 1207 3.17      
20 A 1198 1156 4.11      
21 A 1106 1068 51.11      
22 A 1093 1055 17.44      
23 A 1076 1038 10.50      
24 A 1035 999 3.00      
25 A 960 927 10.38      
26 A 943 910 0.45      
27 A 919 887 23.26      
28 A 881 851 1.14      
29 A 860 830 4.89      
30 A 761 734 6.53      
31 A 740 714 19.16      
32 A 509 492 5.41      
33 A 494 477 1.83      
34 A 448 432 13.81      
35 A 282 273 0.50      
36 A 184 177 2.66      

Unscaled Zero Point Vibrational Energy (zpe) 26851.6 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 25911.8 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 B3PW91/cc-pVDZ
ABC
0.17377 0.15833 0.09030

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/cc-pVDZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.625 1.875 -0.197
C2 0.871 1.093 -0.081
H3 -0.758 2.393 0.093
C4 -0.437 1.349 0.063
H5 -2.319 0.490 -0.523
H6 -1.872 0.152 1.146
C7 -1.459 0.248 0.125
H8 -0.719 -1.085 -1.419
H9 -1.429 -1.937 -0.032
C10 -0.816 -1.067 -0.320
H11 1.072 -2.125 -0.018
H12 0.502 -1.191 1.396
C13 0.570 -1.198 0.291
O14 1.441 -0.140 -0.113

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 H6 C7 H8 H9 C10 H11 H12 C13 O14
H11.09272.45572.14464.19334.12413.50173.96944.88753.82594.04293.63363.28552.0260
C21.09272.09071.34093.27643.14942.48663.01073.80432.75193.22572.74552.34051.3594
H32.45572.09071.09212.53772.71552.25663.79284.38303.48554.87594.01613.83333.3605
C42.14461.34091.09212.14992.16021.50302.86393.43352.47603.78923.01882.74852.4037
H54.19333.27642.53772.14991.76091.10372.41692.63052.17344.31173.80333.44353.8342
H64.12413.14942.71552.16021.76091.10653.07242.43852.18003.89982.73912.91863.5564
C73.50172.48662.25661.50301.10371.10652.16962.19061.53013.47232.74442.49692.9350
H83.96943.01073.79282.86392.41693.07242.16961.77541.10312.50053.07012.14472.6952
H94.88753.80434.38303.43352.63052.43852.19061.77541.10182.50802.51462.15593.3866
C103.82592.75193.48552.47602.17342.18001.53011.10311.10182.18532.16751.52102.4489
H114.04293.22574.87593.78924.31173.89983.47232.50052.50802.18531.78791.09902.0213
H123.63362.74554.01613.01883.80332.73912.74443.07012.51462.16751.78791.10702.0646
C133.28552.34053.83332.74853.44352.91862.49692.14472.15591.52101.09901.10701.4279
O142.02601.35943.36052.40373.83423.55642.93502.69523.38662.44892.02132.06461.4279

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 123.263 H1 C2 O14 110.952
C2 C4 H3 118.125 C2 C4 C7 121.841
C2 O14 C13 114.193 H3 C4 C7 119.985
C4 C2 O14 125.784 C4 C7 H5 110.194
C4 C7 H6 110.841 C4 C7 C10 109.438
H5 C7 H6 105.641 H5 C7 C10 110.162
H6 C7 C10 110.516 C7 C10 H8 109.897
C7 C10 H9 111.641 C7 C10 C13 109.843
H8 C10 H9 107.262 H8 C10 C13 108.585
H9 C10 C13 109.534 C10 C13 H11 112.039
C10 C13 H12 110.139 C10 C13 O14 112.254
H11 C13 H12 108.288 H11 C13 O14 105.506
H12 C13 O14 108.407
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.022      
2 C 0.142      
3 H 0.007      
4 C -0.164      
5 H 0.044      
6 H 0.047      
7 C -0.013      
8 H 0.051      
9 H 0.033      
10 C -0.099      
11 H 0.041      
12 H 0.040      
13 C 0.122      
14 O -0.274      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.024 -0.610 0.249 1.217
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -37.506 0.691 0.135
y 0.691 -33.550 -0.514
z 0.135 -0.514 -37.456
Traceless
 xyz
x -2.003 0.691 0.135
y 0.691 3.931 -0.514
z 0.135 -0.514 -1.927
Polar
3z2-r2-3.855
x2-y2-3.956
xy0.691
xz0.135
yz-0.514


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


<r2> (average value of r2) Å2
<r2> 141.089
(<r2>)1/2 11.878