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: B3LYP/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 B3LYP/3-21G*
 hartrees
Energy at 0K-269.067847
Energy at 298.15K-269.077748
Nuclear repulsion energy238.611780
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 B3LYP/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 3225 3102 23.13      
2 A 3199 3077 2.42      
3 A 3132 3013 31.07      
4 A 3117 2998 29.10      
5 A 3077 2960 31.39      
6 A 3064 2948 8.51      
7 A 3042 2926 40.48      
8 A 3028 2913 28.34      
9 A 1707 1643 51.59      
10 A 1558 1499 2.93      
11 A 1543 1484 3.64      
12 A 1535 1477 2.28      
13 A 1450 1394 0.83      
14 A 1405 1352 2.88      
15 A 1394 1341 2.65      
16 A 1384 1331 9.41      
17 A 1320 1270 3.23      
18 A 1293 1244 31.04      
19 A 1262 1214 12.60      
20 A 1232 1185 7.29      
21 A 1120 1077 3.35      
22 A 1091 1049 89.09      
23 A 1052 1012 6.72      
24 A 1048 1008 16.22      
25 A 985 948 0.29      
26 A 920 885 7.22      
27 A 910 876 4.08      
28 A 871 838 16.32      
29 A 824 793 4.51      
30 A 773 744 11.83      
31 A 748 720 22.60      
32 A 514 494 6.27      
33 A 492 474 2.62      
34 A 452 435 19.04      
35 A 282 271 0.59      
36 A 171 165 5.05      

Unscaled Zero Point Vibrational Energy (zpe) 27109.7 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 26079.5 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 B3LYP/3-21G*
ABC
0.16830 0.15617 0.08827

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.665 1.852 -0.202
C2 0.899 1.096 -0.081
H3 -0.709 2.417 0.078
C4 -0.398 1.379 0.058
H5 -2.313 0.559 -0.491
H6 -1.831 0.193 1.168
C7 -1.455 0.294 0.140
H8 -0.749 -1.040 -1.427
H9 -1.507 -1.892 -0.063
C10 -0.858 -1.054 -0.337
H11 1.004 -2.176 -0.043
H12 0.445 -1.258 1.386
C13 0.530 -1.252 0.292
O14 1.461 -0.180 -0.104

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 H6 C7 H8 H9 C10 H11 H12 C13 O14
H11.08332.45642.13294.19284.10503.50433.96144.90923.85054.08483.69923.34162.0442
C21.08332.08711.33513.28193.13492.49663.01453.83622.78773.27362.81102.40561.3941
H32.45642.08711.08352.51932.71902.25103.77054.38433.49864.90334.06803.87813.3890
C42.13291.33511.08352.15382.16601.51682.85993.45592.50713.82293.07102.79962.4319
H54.19283.28192.51932.15381.76611.09722.42472.61542.17794.32253.79893.46033.8654
H64.10503.13492.71902.16601.76611.09953.06982.44252.18323.88772.70762.90283.5488
C73.50432.49662.25101.51681.09721.09952.17542.19591.54953.49032.75192.52042.9647
H83.96143.01453.77052.85992.42473.06982.17541.77791.09522.50563.06372.15272.7160
H94.90923.83624.38433.45592.61542.44252.19591.77791.09532.52762.51252.16463.4273
C103.85052.78773.49862.50712.17792.18321.54951.09521.09532.19362.16981.53612.4893
H114.08483.27364.90333.82294.32253.88773.49032.50562.52762.19361.78841.09152.0488
H123.69922.81104.06803.07103.79892.70762.75193.06372.51252.16981.78841.09762.1015
C133.34162.40563.87812.79963.46032.90282.52042.15272.16461.53611.09151.09761.4744
O142.04421.39413.38902.43193.86543.54882.96472.71603.42732.48932.04882.10151.4744

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 123.424 H1 C2 O14 110.576
C2 C4 H3 118.930 C2 C4 C7 122.060
C2 O14 C13 113.959 H3 C4 C7 118.975
C4 C2 O14 125.999 C4 C7 H5 109.922
C4 C7 H6 110.754 C4 C7 C10 109.692
H5 C7 H6 107.028 H5 C7 C10 109.563
H6 C7 C10 109.841 C7 C10 H8 109.480
C7 C10 H9 111.090 C7 C10 C13 109.535
H8 C10 H9 108.510 H8 C10 C13 108.633
H9 C10 C13 109.549 C10 C13 H11 112.084
C10 C13 H12 109.824 C10 C13 O14 111.534
H11 C13 H12 109.566 H11 C13 O14 104.984
H12 C13 O14 108.701
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.207      
2 C 0.089      
3 H 0.180      
4 C -0.236      
5 H 0.201      
6 H 0.200      
7 C -0.407      
8 H 0.214      
9 H 0.194      
10 C -0.422      
11 H 0.210      
12 H 0.199      
13 C -0.131      
14 O -0.498      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.320 -0.540 0.308 1.460
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -38.246 0.967 0.154
y 0.967 -33.028 -0.610
z 0.154 -0.610 -37.739
Traceless
 xyz
x -2.862 0.967 0.154
y 0.967 4.964 -0.610
z 0.154 -0.610 -2.102
Polar
3z2-r2-4.205
x2-y2-5.218
xy0.967
xz0.154
yz-0.610


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.298 -0.289 -0.262
y -0.289 8.197 -0.136
z -0.262 -0.136 5.113


<r2> (average value of r2) Å2
<r2> 143.527
(<r2>)1/2 11.980