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All results from a given calculation for C5H10O (Pentanal)

using model chemistry: QCISD/6-31G*

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/6-31G*
 hartrees
Energy at 0K-270.907216
Energy at 298.15K-270.918085
Nuclear repulsion energy230.539848
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/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3138 2988 36.55      
2 A' 3072 2925 27.78      
3 A' 3060 2914 18.85      
4 A' 3045 2900 35.85      
5 A' 3038 2893 11.37      
6 A' 2954 2813 134.77      
7 A' 1822 1735 108.24      
8 A' 1562 1487 6.36      
9 A' 1547 1473 0.45      
10 A' 1542 1468 1.33      
11 A' 1516 1443 11.19      
12 A' 1469 1399 4.55      
13 A' 1466 1396 1.61      
14 A' 1450 1381 8.38      
15 A' 1412 1344 12.41      
16 A' 1315 1252 3.50      
17 A' 1169 1113 10.08      
18 A' 1110 1057 0.84      
19 A' 1075 1024 1.42      
20 A' 948 903 1.29      
21 A' 925 881 9.31      
22 A' 702 669 14.06      
23 A' 406 387 1.87      
24 A' 303 288 4.67      
25 A' 145 138 4.98      
26 A" 3135 2985 57.35      
27 A" 3115 2966 24.82      
28 A" 3077 2930 7.86      
29 A" 3070 2923 10.33      
30 A" 1549 1475 6.40      
31 A" 1361 1296 0.18      
32 A" 1346 1281 0.12      
33 A" 1276 1215 0.04      
34 A" 1193 1136 0.08      
35 A" 1002 954 0.87      
36 A" 881 839 0.05      
37 A" 764 728 1.32      
38 A" 696 663 2.72      
39 A" 255 242 0.00      
40 A" 171 163 1.41      
41 A" 114 108 1.04      
42 A" 77 73 2.35      

Unscaled Zero Point Vibrational Energy (zpe) 31632.9 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 30124.0 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 QCISD/6-31G*
ABC
0.34040 0.04904 0.04427

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.818 -2.064 0.000
C2 -0.375 -1.136 0.000
C3 0.000 0.344 0.000
C4 -1.224 1.262 0.000
C5 -0.845 2.744 0.000
O6 1.980 -1.693 0.000
H7 0.578 -3.150 0.000
H8 -0.994 -1.390 0.876
H9 -0.994 -1.390 -0.876
H10 0.627 0.557 -0.877
H11 0.627 0.557 0.877
H12 -1.847 1.041 0.880
H13 -1.847 1.041 -0.880
H14 -1.736 3.385 0.000
H15 -0.248 2.996 -0.886
H16 -0.248 2.996 0.886

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 O6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16
C11.51132.54273.90255.08741.21981.11222.12262.12262.77022.77024.18504.18506.01735.24645.2464
C21.51131.52592.54353.90802.41942.22861.10271.10272.15342.15342.77102.77104.72064.22744.2274
C32.54271.52591.53002.54482.84003.54132.18222.18221.09891.09892.16132.16133.50152.80752.8075
C43.90252.54351.53001.52964.35794.76592.80242.80242.16612.16611.10081.10082.18352.17792.1779
C55.08743.90802.54481.52965.25966.06364.22864.22862.77842.77842.16312.16311.09711.09781.0978
O61.21982.41942.84004.35795.25962.02193.11513.11512.76732.76734.78414.78416.29155.26625.2662
H71.11222.22863.54134.76596.06362.02192.51762.51763.80963.80964.92134.92136.93236.26446.2644
H82.12261.10272.18222.80244.22863.11512.51761.75183.08102.53402.57603.11764.91064.78534.4490
H92.12261.10272.18222.80244.22863.11512.51761.75182.53403.08103.11762.57604.91064.44904.7853
H102.77022.15341.09892.16612.77842.76733.80963.08102.53401.75323.07272.52103.78792.59143.1343
H112.77022.15341.09892.16612.77842.76733.80962.53403.08101.75322.52103.07273.78793.13432.5914
H124.18502.77102.16131.10082.16314.78414.92132.57603.11763.07272.52101.76032.50603.08192.5253
H134.18502.77102.16131.10082.16314.78414.92133.11762.57602.52103.07271.76032.50602.52533.0819
H146.01734.72063.50152.18351.09716.29156.93234.91064.91063.78793.78792.50602.50601.77461.7746
H155.24644.22742.80752.17791.09785.26626.26444.78534.44902.59143.13433.08192.52531.77461.7730
H165.24644.22742.80752.17791.09785.26626.26444.44904.78533.13432.59142.52533.08191.77461.7730

picture of Pentanal state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 113.687 C1 C2 H8 107.555
C1 C2 H9 107.555 C2 C1 O6 124.373
C2 C1 H7 115.471 C2 C3 C4 112.671
C2 C3 H10 109.172 C2 C3 H11 109.172
C3 C2 H8 111.208 C3 C2 H9 111.208
C3 C4 C5 112.555 C3 C4 H12 109.394
C3 C4 H13 109.394 C4 C3 H10 109.881
C4 C3 H11 109.881 C4 C5 H14 111.386
C4 C5 H15 110.902 C4 C5 H16 110.902
C5 C4 H12 109.561 C5 C4 H13 109.561
O6 C1 H7 120.156 H8 C2 H9 105.178
H10 C3 H11 105.828 H12 C4 H13 106.174
H14 C5 H15 107.898 H14 C5 H16 107.898
H15 C5 H16 107.703
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability