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 C5H10O (2H-Pyran, tetrahydro-)

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-268.525601
Energy at 298.15K-268.538764
Nuclear repulsion energy259.192779
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' 3283 2963 46.39      
2 A' 3262 2944 59.76      
3 A' 3242 2926 38.00      
4 A' 3212 2899 4.29      
5 A' 3193 2882 27.62      
6 A' 3177 2868 81.28      
7 A' 1684 1520 6.08      
8 A' 1656 1495 4.15      
9 A' 1650 1489 8.84      
10 A' 1558 1406 0.85      
11 A' 1516 1368 4.31      
12 A' 1432 1293 1.56      
13 A' 1417 1279 5.77      
14 A' 1284 1159 3.12      
15 A' 1141 1030 7.50      
16 A' 1079 974 9.05      
17 A' 951 858 11.41      
18 A' 918 829 17.82      
19 A' 852 769 2.27      
20 A' 600 542 6.05      
21 A' 458 413 3.88      
22 A' 409 369 7.02      
23 A' 257 232 7.99      
24 A" 3278 2959 43.52      
25 A" 3253 2936 30.35      
26 A" 3212 2899 33.91      
27 A" 3170 2861 13.24      
28 A" 1669 1507 0.07      
29 A" 1637 1478 2.95      
30 A" 1519 1371 3.35      
31 A" 1510 1363 7.92      
32 A" 1507 1361 5.10      
33 A" 1429 1290 4.63      
34 A" 1341 1210 29.48      
35 A" 1305 1178 5.01      
36 A" 1195 1078 89.62      
37 A" 1134 1024 0.95      
38 A" 1087 981 5.14      
39 A" 917 828 0.66      
40 A" 894 807 0.27      
41 A" 493 445 0.07      
42 A" 245 221 0.78      

Unscaled Zero Point Vibrational Energy (zpe) 34512.5 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 31151.0 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
0.15313 0.15035 0.08601

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 1.425 0.000
C2 0.036 -1.462 0.000
H3 -1.023 -1.709 0.000
H4 0.591 -2.393 0.000
C5 0.367 -0.638 1.260
C6 0.367 -0.638 -1.260
C7 -0.352 0.714 -1.203
C8 -0.352 0.714 1.203
H9 0.071 -1.170 2.157
H10 0.071 -1.170 -2.157
H11 1.436 -0.462 1.303
H12 1.436 -0.462 -1.303
H13 -1.427 0.559 -1.240
H14 -1.427 0.559 1.240
H15 -0.062 1.353 -2.023
H16 -0.062 1.353 2.023

Atom - Atom Distances (Å)
  O1 C2 H3 H4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14 H15 H16
O12.88713.29683.86332.44472.44471.44041.44043.37553.37552.70602.70602.07972.07972.02552.0255
C22.88711.08681.08401.54181.54182.51662.51662.17732.17732.15842.15842.78672.78673.46823.4682
H33.29681.08681.75262.16042.16042.78752.78752.47832.47833.04923.04922.61722.61723.79403.7940
H43.86331.08401.75262.17232.17233.46283.46282.53362.53362.47772.47773.78543.78544.30734.3073
C52.44471.54182.16042.17232.52032.89991.53241.08453.47141.08422.78293.30242.15713.86372.1748
C62.44471.54182.16042.17232.52031.53242.89993.47141.08452.78291.08422.15713.30242.17483.8637
C71.44042.51662.78753.46282.89991.53242.40513.87562.15483.29552.14271.08732.67381.07963.3012
C81.44042.51662.78753.46281.53242.89992.40512.15483.87562.14273.29552.67381.08733.30121.0796
H93.37552.17732.47832.53361.08453.47143.87562.15484.31481.75853.78674.09682.46564.88502.5305
H103.37552.17732.47832.53363.47141.08452.15483.87564.31483.78671.75852.46564.09682.53054.8850
H112.70602.15843.04922.47771.08422.78293.29552.14271.75853.78672.60663.96403.04094.07512.4615
H122.70602.15843.04922.47772.78291.08422.14273.29553.78671.75852.60663.04093.96402.46154.0751
H132.07972.78672.61723.78543.30242.15711.08732.67384.09682.46563.96403.04092.48091.76263.6257
H142.07972.78672.61723.78542.15713.30242.67381.08732.46564.09683.04093.96402.48093.62571.7626
H152.02553.46823.79404.30733.86372.17481.07963.30124.88502.53054.07512.46151.76263.62574.0466
H162.02553.46823.79404.30732.17483.86373.30121.07962.53054.88502.46154.07513.62571.76264.0466

picture of 2H-Pyran, tetrahydro- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C7 C6 110.609 O1 C7 H13 109.944
O1 C7 H15 106.106 O1 C8 C5 110.609
O1 C8 H14 109.944 O1 C8 H16 106.106
C2 C5 C8 109.894 C2 C5 H9 110.799
C2 C5 H11 109.318 C2 C6 C7 109.894
C2 C6 H10 110.799 C2 C6 H12 109.318
H3 C2 H4 107.677 H3 C2 C5 109.319
H3 C2 C6 109.319 H4 C2 C5 110.429
H4 C2 C6 110.429 C5 C2 C6 109.631
C5 C8 H14 109.687 C5 C8 H16 111.566
C6 C7 H13 109.687 C6 C7 H15 111.566
C7 O1 C8 113.209 C7 C6 H10 109.672
C7 C6 H12 108.745 C8 C5 H9 109.672
C8 C5 H11 108.745 H9 C5 H11 108.370
H10 C6 H12 108.370 H13 C7 H15 108.859
H14 C8 H16 108.859
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.641 -0.563    
2 C -0.419 0.053    
3 H 0.203 0.008    
4 H 0.216 0.000    
5 C -0.451 -0.118    
6 C -0.451 -0.118    
7 C -0.065 0.265    
8 C -0.065 0.265    
9 H 0.207 0.011    
10 H 0.207 0.011    
11 H 0.223 0.059    
12 H 0.223 0.059    
13 H 0.183 0.005    
14 H 0.183 0.005    
15 H 0.223 0.028    
16 H 0.223 0.028    


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.579 -1.771 0.000 1.864
CHELPG -0.598 -1.739 0.000 1.839
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -38.254 -0.602 0.000
y -0.602 -42.881 0.000
z 0.000 0.000 -35.082
Traceless
 xyz
x 0.728 -0.602 0.000
y -0.602 -6.213 0.000
z 0.000 0.000 5.485
Polar
3z2-r210.971
x2-y24.627
xy-0.602
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.723 -0.105 0.000
y -0.105 7.022 0.000
z 0.000 0.000 8.096


<r2> (average value of r2) Å2
<r2> 153.470
(<r2>)1/2 12.388