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: B1B95/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B1B95/STO-3G
 hartrees
Energy at 0K-267.066268
Energy at 298.15K-267.075873
Nuclear repulsion energy237.683475
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 B1B95/STO-3G
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 3496 3087 7.01      
2 A 3489 3081 0.77      
3 A 3452 3048 7.80      
4 A 3443 3040 1.51      
5 A 3434 3032 1.55      
6 A 3375 2981 0.69      
7 A 3340 2949 4.09      
8 A 3310 2922 9.02      
9 A 1873 1654 47.62      
10 A 1667 1472 0.60      
11 A 1650 1457 1.06      
12 A 1640 1448 0.96      
13 A 1538 1358 2.12      
14 A 1507 1330 8.91      
15 A 1499 1323 2.15      
16 A 1441 1272 16.06      
17 A 1378 1217 1.31      
18 A 1354 1195 16.40      
19 A 1333 1177 17.78      
20 A 1270 1121 5.82      
21 A 1194 1054 24.81      
22 A 1180 1042 2.26      
23 A 1155 1020 4.35      
24 A 1087 959 3.04      
25 A 1014 895 2.30      
26 A 1007 889 1.13      
27 A 984 869 7.04      
28 A 950 839 0.65      
29 A 908 802 1.25      
30 A 795 702 1.68      
31 A 755 667 13.43      
32 A 527 465 0.94      
33 A 502 443 1.20      
34 A 446 394 10.60      
35 A 270 239 0.52      
36 A 185 163 2.11      

Unscaled Zero Point Vibrational Energy (zpe) 29221.2 cm-1
Scaled (by 0.883) Zero Point Vibrational Energy (zpe) 25802.4 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 B1B95/STO-3G
ABC
0.17068 0.15197 0.08767

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/STO-3G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.607 1.914 -0.195
C2 0.865 1.109 -0.076
H3 -0.791 2.394 0.081
C4 -0.446 1.358 0.059
H5 -2.347 0.492 -0.505
H6 -1.868 0.135 1.162
C7 -1.482 0.247 0.133
H8 -0.737 -1.079 -1.433
H9 -1.445 -1.945 -0.046
C10 -0.836 -1.077 -0.337
H11 1.056 -2.153 0.001
H12 0.475 -1.196 1.406
C13 0.571 -1.205 0.299
O14 1.502 -0.144 -0.117

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 H6 C7 H8 H9 C10 H11 H12 C13 O14
H11.10072.46052.14174.21254.13253.52453.99804.92203.86354.10893.67623.32362.0619
C21.10072.10241.34163.29863.15472.50903.03263.82952.78163.26872.76792.36291.4057
H32.46052.10241.09282.52652.72662.25603.78944.39033.49634.90944.03133.85493.4261
C42.14171.34161.09282.16302.17591.52012.87173.45202.49673.81953.03082.76792.4656
H54.21253.29862.52652.16301.77091.10232.43292.63852.18444.33993.80303.46983.9196
H64.13253.15472.72662.17591.77091.10463.08002.44212.18663.89072.70582.91353.6151
C73.52452.50902.25601.52011.10231.10462.18342.20001.54663.49642.74462.52033.0195
H83.99803.03263.78942.87172.43293.08002.18341.78171.10022.53513.08882.17442.7600
H94.92203.82954.39033.45202.63852.44212.20001.78171.10032.51082.52092.17513.4544
C103.86352.78163.49632.49672.18442.18661.54661.10021.10032.20312.18391.54912.5260
H114.10893.26874.90943.81954.33993.89073.49642.53512.51082.20311.79671.10632.0616
H123.67622.76794.03133.03083.80302.70582.74463.08882.52092.18391.79671.11042.1168
C133.32362.36293.85492.76793.46982.91352.52032.17442.17511.54911.10631.11041.4720
O142.06191.40573.42612.46563.91963.61513.01952.76003.45442.52602.06162.11681.4720

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 122.238 H1 C2 O14 110.109
C2 C4 H3 119.100 C2 C4 C7 122.381
C2 O14 C13 110.370 H3 C4 C7 118.485
C4 C2 O14 127.641 C4 C7 H5 110.123
C4 C7 H6 111.001 C4 C7 C10 108.996
H5 C7 H6 106.728 H5 C7 C10 109.968
H6 C7 C10 110.007 C7 C10 H8 110.016
C7 C10 H9 111.322 C7 C10 C13 109.001
H8 C10 H9 108.134 H8 C10 C13 109.145
H9 C10 C13 109.190 C10 C13 H11 111.029
C10 C13 H12 109.291 C10 C13 O14 113.437
H11 C13 H12 108.296 H11 C13 O14 105.301
H12 C13 O14 109.316
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.084      
2 C -0.007      
3 H 0.074      
4 C -0.128      
5 H 0.081      
6 H 0.076      
7 C -0.145      
8 H 0.082      
9 H 0.080      
10 C -0.145      
11 H 0.087      
12 H 0.080      
13 C -0.046      
14 O -0.174      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.938 -0.595 0.263 1.141
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -35.361 0.623 0.201
y 0.623 -31.930 -0.430
z 0.201 -0.430 -34.324
Traceless
 xyz
x -2.233 0.623 0.201
y 0.623 2.912 -0.430
z 0.201 -0.430 -0.679
Polar
3z2-r2-1.357
x2-y2-3.430
xy0.623
xz0.201
yz-0.430


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.329 -0.285 -0.237
y -0.285 5.261 -0.127
z -0.237 -0.127 2.751


<r2> (average value of r2) Å2
<r2> 142.862
(<r2>)1/2 11.953