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: QCISD/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 QCISD/3-21G
 hartrees
Energy at 0K-269.153647
Energy at 298.15K-269.164530
Nuclear repulsion energy228.488800
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 QCISD/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' 3086 2991 33.36      
2 A' 3039 2945 22.90      
3 A' 3020 2927 14.42      
4 A' 3015 2922 26.63      
5 A' 3012 2919 5.44      
6 A' 2910 2820 137.36      
7 A' 1679 1627 47.24      
8 A' 1582 1534 5.98      
9 A' 1570 1522 2.33      
10 A' 1561 1513 0.99      
11 A' 1536 1489 13.59      
12 A' 1475 1430 3.33      
13 A' 1447 1402 5.39      
14 A' 1422 1378 0.56      
15 A' 1394 1351 8.30      
16 A' 1319 1279 13.71      
17 A' 1147 1111 13.98      
18 A' 1054 1022 2.47      
19 A' 1013 981 2.07      
20 A' 919 891 0.33      
21 A' 876 849 11.64      
22 A' 690 669 10.16      
23 A' 402 389 2.22      
24 A' 301 291 4.69      
25 A' 146 141 4.71      
26 A" 3090 2995 71.41      
27 A" 3078 2983 1.70      
28 A" 3044 2950 0.09      
29 A" 3040 2947 8.27      
30 A" 1578 1530 6.40      
31 A" 1376 1334 0.13      
32 A" 1361 1319 0.04      
33 A" 1286 1247 0.04      
34 A" 1194 1157 0.32      
35 A" 1020 988 0.67      
36 A" 891 864 0.35      
37 A" 770 747 0.87      
38 A" 708 686 5.19      
39 A" 250 243 0.00      
40 A" 188 182 1.16      
41 A" 113 110 1.28      
42 A" 71 69 1.42      

Unscaled Zero Point Vibrational Energy (zpe) 31334.6 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 30369.5 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 QCISD/3-21G
ABC
0.32273 0.04883 0.04381

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.776 -2.100 0.000
C2 -0.432 -1.159 0.000
C3 0.000 0.327 0.000
C4 -1.212 1.298 0.000
C5 -0.757 2.786 0.000
O6 1.958 -1.709 0.000
H7 0.524 -3.180 0.000
H8 -1.049 -1.385 0.887
H9 -1.049 -1.385 -0.887
H10 0.627 0.520 -0.884
H11 0.627 0.520 0.884
H12 -1.835 1.102 0.888
H13 -1.835 1.102 -0.888
H14 -1.623 3.463 0.000
H15 -0.148 2.998 -0.892
H16 -0.148 2.998 0.892

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 O6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16
C11.53062.54803.93675.12041.24511.10882.15122.15122.76842.76844.22574.22576.05845.25675.2567
C21.53061.54812.57843.95862.45202.23491.10381.10382.17302.17302.80562.80564.77384.26104.2610
C32.54801.54811.55302.57252.82453.54582.19542.19541.10071.10072.18092.18093.53132.81922.8192
C43.93672.57841.55301.55574.36914.80252.83082.83082.18422.18421.10221.10222.20392.19432.1943
C55.12043.95862.57251.55575.25076.10144.27424.27422.79882.79882.18752.18751.09971.10021.1002
O61.24512.45202.82454.36915.25072.05433.15173.15172.74152.74154.80364.80366.29075.23265.2326
H71.10882.23493.54584.80256.10142.05432.54582.54583.80473.80474.96854.96856.98146.27746.2774
H82.15121.10382.19542.83084.27423.15172.54581.77323.09412.53762.60853.15494.96234.81494.4745
H92.15121.10382.19542.83084.27423.15172.54581.77322.53763.09413.15492.60854.96234.47454.8149
H102.76842.17301.10072.18422.79882.74153.80473.09412.53761.76733.08892.53043.80952.59673.1456
H112.76842.17301.10072.18422.79882.74153.80472.53763.09411.76732.53043.08893.80953.14562.5967
H124.22572.80562.18091.10222.18754.80364.96852.60853.15493.08892.53041.77582.53153.09912.5373
H134.22572.80562.18091.10222.18754.80364.96853.15492.60852.53043.08891.77582.53152.53733.0991
H146.05844.77383.53132.20391.09976.29076.98144.96234.96233.80953.80952.53152.53151.78531.7853
H155.25674.26102.81922.19431.10025.23266.27744.81494.47452.59673.14563.09912.53731.78531.7834
H165.25674.26102.81922.19431.10025.23266.27744.47454.81493.14562.59672.53733.09911.78531.7834

picture of Pentanal state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 111.710 C1 C2 H8 108.398
C1 C2 H9 108.398 C2 C1 O6 123.779
C2 C1 H7 114.782 C2 C3 C4 112.495
C2 C3 H10 109.076 C2 C3 H11 109.076
C3 C2 H8 110.644 C3 C2 H9 110.644
C3 C4 C5 111.686 C3 C4 H12 109.263
C3 C4 H13 109.263 C4 C3 H10 109.610
C4 C3 H11 109.610 C4 C5 H14 111.023
C4 C5 H15 110.240 C4 C5 H16 110.240
C5 C4 H12 109.597 C5 C4 H13 109.597
O6 C1 H7 121.439 H8 C2 H9 106.885
H10 C3 H11 106.808 H12 C4 H13 107.333
H14 C5 H15 108.489 H14 C5 H16 108.489
H15 C5 H16 108.286
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability