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 (Pentanal)

using model chemistry: HF/CEP-121G

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/CEP-121G
 hartrees
Energy at 0K-48.837994
Energy at 298.15K-48.849079
Nuclear repulsion energy129.405928
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/CEP-121G
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' 3223 2941 79.16      
2 A' 3172 2894 29.53      
3 A' 3164 2887 132.91      
4 A' 3142 2867 34.08      
5 A' 3133 2859 24.14      
6 A' 3128 2855 53.69      
7 A' 1861 1698 177.85      
8 A' 1652 1507 11.41      
9 A' 1637 1494 0.59      
10 A' 1634 1491 1.77      
11 A' 1611 1470 16.91      
12 A' 1555 1419 4.02      
13 A' 1545 1409 3.19      
14 A' 1523 1389 11.84      
15 A' 1497 1366 15.38      
16 A' 1411 1287 5.80      
17 A' 1228 1121 11.30      
18 A' 1155 1054 1.49      
19 A' 1117 1019 2.04      
20 A' 984 898 0.22      
21 A' 969 884 3.25      
22 A' 722 659 23.18      
23 A' 419 383 2.27      
24 A' 312 285 6.30      
25 A' 149 136 7.51      
26 A" 3234 2951 162.20      
27 A" 3218 2937 5.15      
28 A" 3177 2899 16.68      
29 A" 3171 2893 15.32      
30 A" 1636 1493 7.69      
31 A" 1437 1311 0.25      
32 A" 1422 1297 0.02      
33 A" 1352 1234 0.27      
34 A" 1276 1165 0.26      
35 A" 1061 968 1.00      
36 A" 938 856 0.11      
37 A" 815 744 0.73      
38 A" 751 685 3.44      
39 A" 247 225 0.00      
40 A" 161 147 3.56      
41 A" 111 102 1.67      
42 A" 70 64 5.24      

Unscaled Zero Point Vibrational Energy (zpe) 33009.3 cm-1
Scaled (by 0.9125) Zero Point Vibrational Energy (zpe) 30121.0 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/CEP-121G
ABC
0.34428 0.04801 0.04346

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.869 -2.063 0.000
C2 -0.338 -1.145 0.000
C3 0.000 0.356 0.000
C4 -1.263 1.242 0.000
C5 -0.931 2.748 0.000
O6 2.034 -1.682 0.000
H7 0.657 -3.134 0.000
H8 -0.944 -1.406 0.869
H9 -0.944 -1.406 -0.869
H10 0.611 0.587 -0.869
H11 0.611 0.587 0.869
H12 -1.872 1.007 0.873
H13 -1.872 1.007 -0.873
H14 -1.836 3.349 0.000
H15 -0.350 3.019 -0.879
H16 -0.350 3.019 0.879

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 O6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16
C11.51592.57003.93295.13591.22601.09232.11452.11452.80032.80034.20694.20696.05065.29915.2991
C21.51591.53872.56033.93762.43202.22401.09061.09062.15752.15752.78362.78364.73784.25584.2558
C32.57001.53871.54312.56642.87923.55152.17912.17911.08681.08682.16572.16573.51192.82592.8259
C43.93292.56031.54311.54174.40704.77902.80482.80482.16712.16711.08981.08982.18392.18252.1825
C55.13593.93762.56641.54175.33026.09234.24314.24312.79292.79292.16232.16231.08731.08771.0877
O61.22602.43202.87924.40705.33022.00173.11413.11412.81552.81554.82184.82186.34785.34355.3435
H71.09232.22403.55154.77906.09232.00172.51082.51083.82153.82154.93044.93046.94666.29666.2966
H82.11451.09062.17912.80484.24313.11412.51081.73743.06682.52712.58533.11734.91554.79404.4642
H92.11451.09062.17912.80484.24313.11412.51081.73742.52713.06683.11732.58534.91554.46424.7940
H102.80032.15751.08682.16712.79292.81553.82153.06682.52711.73743.06172.51803.79162.61503.1451
H112.80032.15751.08682.16712.79292.81553.82152.52713.06681.73742.51803.06173.79163.14512.6150
H124.20692.78362.16571.08982.16234.82184.93042.58533.11733.06172.51801.74612.49983.07092.5224
H134.20692.78362.16571.08982.16234.82184.93043.11732.58532.51803.06171.74612.49982.52243.0709
H146.05064.73783.51192.18391.08736.34786.94664.91554.91553.79163.79162.49982.49981.75801.7580
H155.29914.25582.82592.18251.08775.34356.29664.79404.46422.61503.14513.07092.52241.75801.7572
H165.29914.25582.82592.18251.08775.34356.29664.46424.79403.14512.61502.52243.07091.75801.7572

picture of Pentanal state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 114.561 C1 C2 H8 107.309
C1 C2 H9 107.309 C2 C1 O6 124.647
C2 C1 H7 116.056 C2 C3 C4 112.357
C2 C3 H10 109.312 C2 C3 H11 109.312
C3 C2 H8 110.793 C3 C2 H9 110.793
C3 C4 C5 112.598 C3 C4 H12 109.479
C3 C4 H13 109.479 C4 C3 H10 109.765
C4 C3 H11 109.765 C4 C5 H14 111.168
C4 C5 H15 111.024 C4 C5 H16 111.024
C5 C4 H12 109.311 C5 C4 H13 109.311
O6 C1 H7 119.297 H8 C2 H9 105.605
H10 C3 H11 106.137 H12 C4 H13 106.475
H14 C5 H15 107.858 H14 C5 H16 107.858
H15 C5 H16 107.757
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.143      
2 C -0.343      
3 C -0.230      
4 C -0.193      
5 C -0.463      
6 O -0.288      
7 H 0.110      
8 H 0.160      
9 H 0.160      
10 H 0.140      
11 H 0.140      
12 H 0.117      
13 H 0.117      
14 H 0.148      
15 H 0.141      
16 H 0.141      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -3.424 -0.412 0.000 3.449
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -48.444 4.961 0.000
y 4.961 -35.895 0.000
z 0.000 0.000 -37.690
Traceless
 xyz
x -11.652 4.961 0.000
y 4.961 7.172 0.000
z 0.000 0.000 4.480
Polar
3z2-r28.960
x2-y2-12.549
xy4.961
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.760 -0.146 0.000
y -0.146 9.021 0.000
z 0.000 0.000 6.933


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000