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: CISD/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 CISD/3-21G*
 hartrees
Energy at 0K-269.043696
Energy at 298.15K-269.054717
Nuclear repulsion energy230.221254
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 CISD/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' 3190 2981 33.69      
2 A' 3146 2940 21.08      
3 A' 3125 2920 7.43      
4 A' 3120 2915 34.82      
5 A' 3115 2911 9.36      
6 A' 3039 2840 125.52      
7 A' 1802 1684 70.01      
8 A' 1627 1521 7.43      
9 A' 1615 1509 2.70      
10 A' 1605 1500 1.21      
11 A' 1577 1474 14.99      
12 A' 1524 1424 4.31      
13 A' 1504 1405 6.65      
14 A' 1472 1375 0.56      
15 A' 1444 1349 10.13      
16 A' 1367 1278 16.36      
17 A' 1187 1109 15.98      
18 A' 1091 1020 2.72      
19 A' 1051 982 2.10      
20 A' 952 889 0.41      
21 A' 916 856 9.87      
22 A' 716 669 13.48      
23 A' 414 387 2.36      
24 A' 311 291 5.39      
25 A' 150 140 5.38      
26 A" 3196 2987 71.00      
27 A" 3184 2975 0.00      
28 A" 3148 2941 1.79      
29 A" 3143 2937 7.07      
30 A" 1623 1517 7.40      
31 A" 1420 1326 0.14      
32 A" 1404 1312 0.03      
33 A" 1328 1241 0.04      
34 A" 1240 1159 0.25      
35 A" 1056 987 0.90      
36 A" 923 863 0.39      
37 A" 794 742 1.06      
38 A" 728 680 5.86      
39 A" 255 238 0.01      
40 A" 191 179 1.58      
41 A" 116 108 1.48      
42 A" 72 67 1.81      

Unscaled Zero Point Vibrational Energy (zpe) 32441.8 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 30313.6 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 CISD/3-21G*
ABC
0.33045 0.04934 0.04434

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.793 -2.078 0.000
C2 -0.411 -1.154 0.000
C3 0.000 0.329 0.000
C4 -1.217 1.278 0.000
C5 -0.785 2.762 0.000
O6 1.957 -1.688 0.000
H7 0.552 -3.149 0.000
H8 -1.022 -1.386 0.879
H9 -1.022 -1.386 -0.879
H10 0.620 0.527 -0.876
H11 0.620 0.527 0.876
H12 -1.833 1.077 0.881
H13 -1.833 1.077 -0.881
H14 -1.653 3.423 0.000
H15 -0.184 2.983 -0.885
H16 -0.184 2.983 0.885

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 O6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16
C11.51732.53353.91165.09061.22711.09832.13222.13222.75332.75334.19784.19786.02035.22935.2293
C21.51731.53872.56253.93442.42692.21511.09551.09552.15822.15822.78842.78844.74324.23684.2368
C32.53351.53871.54342.55712.80963.52122.18132.18131.09191.09192.16682.16683.50862.80392.8039
C43.91162.56251.54341.54574.34364.76762.81242.81242.16972.16971.09361.09362.18912.18062.1806
C55.09063.93442.55711.54575.22676.06074.24734.24732.78212.78212.17172.17171.09141.09191.0919
O61.22712.42692.80964.34365.22672.02703.12063.12062.73082.73084.77284.77286.25735.21345.2134
H71.09832.21513.52124.76766.06072.02702.52172.52173.77953.77954.93174.93176.93256.23916.2391
H82.13221.09552.18132.81244.24733.12062.52171.75773.07242.52162.59293.13354.92974.78574.4489
H92.13221.09552.18132.81244.24733.12062.52171.75772.52163.07243.13352.59294.92974.44894.7857
H102.75332.15821.09192.16972.78212.73083.77953.07242.52161.75283.06742.51443.78522.58453.1275
H112.75332.15821.09192.16972.78212.73083.77952.52163.07241.75282.51443.06743.78523.12752.5845
H124.19782.78842.16681.09362.17174.77284.93172.59293.13353.06742.51441.76122.51293.07732.5206
H134.19782.78842.16681.09362.17174.77284.93173.13352.59292.51443.06741.76122.51292.52063.0773
H146.02034.74323.50862.18911.09146.25736.93254.92974.92973.78523.78522.51292.51291.77071.7707
H155.22934.23682.80392.18061.09195.21346.23914.78574.44892.58453.12753.07732.52061.77071.7693
H165.22934.23682.80392.18061.09195.21346.23914.44894.78573.12752.58452.52063.07731.77071.7693

picture of Pentanal state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 111.995 C1 C2 H8 108.306
C1 C2 H9 108.306 C2 C1 O6 123.994
C2 C1 H7 114.805 C2 C3 C4 112.486
C2 C3 H10 109.065 C2 C3 H11 109.065
C3 C2 H8 110.677 C3 C2 H9 110.677
C3 C4 C5 111.745 C3 C4 H12 109.324
C3 C4 H13 109.324 C4 C3 H10 109.648
C4 C3 H11 109.648 C4 C5 H14 111.042
C4 C5 H15 110.348 C4 C5 H16 110.348
C5 C4 H12 109.540 C5 C4 H13 109.540
O6 C1 H7 121.201 H8 C2 H9 106.689
H10 C3 H11 106.759 H12 C4 H13 107.260
H14 C5 H15 108.392 H14 C5 H16 108.392
H15 C5 H16 108.235
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability