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 C5H10 (2-Pentene, (E)-)

using model chemistry: MP2=FULL/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2=FULL/6-31G*
 hartrees
Energy at 0K-195.814566
Energy at 298.15K-195.824752
HF Energy-195.142465
Nuclear repulsion energy170.921352
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 MP2=FULL/6-31G*
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' 3221 3035 21.06      
2 A' 3198 3013 27.19      
3 A' 3190 3006 17.63      
4 A' 3181 2998 18.88      
5 A' 3109 2930 16.64      
6 A' 3093 2914 27.36      
7 A' 3081 2903 26.51      
8 A' 1767 1665 0.11      
9 A' 1574 1483 5.13      
10 A' 1561 1470 8.69      
11 A' 1549 1459 1.63      
12 A' 1477 1392 6.97      
13 A' 1470 1385 1.07      
14 A' 1426 1344 6.83      
15 A' 1370 1291 0.67      
16 A' 1363 1284 0.07      
17 A' 1186 1117 1.59      
18 A' 1134 1069 3.16      
19 A' 1070 1008 2.35      
20 A' 988 931 6.04      
21 A' 893 842 0.05      
22 A' 592 558 0.83      
23 A' 375 353 0.14      
24 A' 216 204 0.24      
25 A" 3200 3015 26.30      
26 A" 3167 2984 20.43      
27 A" 3118 2938 18.68      
28 A" 1563 1473 6.47      
29 A" 1544 1455 6.15      
30 A" 1333 1256 0.08      
31 A" 1148 1082 1.42      
32 A" 1099 1036 0.04      
33 A" 1022 963 27.72      
34 A" 848 799 3.08      
35 A" 720 678 0.28      
36 A" 317 298 1.55      
37 A" 227 214 0.96      
38 A" 198 187 1.57      
39 A" 121 114 0.06      

Unscaled Zero Point Vibrational Energy (zpe) 30854.5 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 29071.1 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 MP2=FULL/6-31G*
ABC
0.44601 0.08256 0.07246

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -0.716 -1.242 0.000
C2 -0.974 -0.184 0.000
H3 -0.287 1.788 0.000
C4 0.000 0.735 0.000
H5 -2.936 -0.277 0.880
H6 -2.936 -0.277 -0.880
H7 -2.598 1.222 0.000
C8 -2.436 0.141 0.000
H9 1.923 0.968 -0.872
H10 1.923 0.968 0.872
C11 1.479 0.470 0.000
H12 2.966 -1.102 0.000
H13 1.491 -1.513 0.885
H14 1.491 -1.513 -0.885
C15 1.877 -1.000 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 H6 H7 C8 H9 H10 C11 H12 H13 H14 C15
H11.08843.06012.10252.57512.57513.10062.20693.55123.55122.78383.68462.39332.39332.6050
C21.08842.08831.33902.15272.15272.14891.49843.23753.23752.53824.04492.93632.93632.9654
H33.06012.08831.09163.47223.47222.37912.70752.51422.51422.20364.35163.85243.85243.5296
C42.10251.33901.09163.22793.22792.64352.50762.12482.12481.50233.48872.83872.83872.5562
H52.57512.15273.47223.22791.76051.77161.09535.31375.01634.56326.02364.59604.92324.9461
H62.57512.15273.47223.22791.76051.77161.09535.01635.31374.56326.02364.92324.59604.9461
H73.10062.14892.37912.64351.77161.77161.09344.61214.61214.14586.03004.99864.99864.9969
C82.20691.49842.70752.50761.09531.09531.09344.52234.52233.92885.54314.35214.35214.4620
H93.55123.23752.51422.12485.31375.01634.61214.52231.74471.09832.47643.07042.51812.1528
H103.55123.23752.51422.12485.01635.31374.61214.52231.74471.09832.47642.51813.07042.1528
C112.78382.53822.20361.50234.56324.56324.14583.92881.09831.09832.16422.17152.17151.5232
H123.68464.04494.35163.48876.02366.02366.03005.54312.47642.47642.16421.76791.76791.0931
H132.39332.93633.85242.83874.59604.92324.99864.35213.07042.51812.17151.76791.76901.0931
H142.39332.93633.85242.83874.92324.59604.99864.35212.51813.07042.17151.76791.76901.0931
C152.60502.96543.52962.55624.94614.94614.99694.46202.15282.15281.52321.09311.09311.0931

picture of 2-Pentene, (E)- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 C2 C4 119.677 H1 C2 C8 116.214
C2 C4 H3 118.092 C2 C4 C11 126.498
C2 C8 H5 111.243 C2 C8 H6 111.243
C2 C8 H7 111.057 H3 C4 C11 115.410
C4 C2 C8 124.108 C4 C11 H9 108.586
C4 C11 H10 108.586 C4 C11 C15 115.320
H5 C8 H6 106.963 H5 C8 H7 108.081
H6 C8 H7 108.081 H9 C11 H10 105.174
H9 C11 C15 109.343 H10 C11 C15 109.343
C11 C15 H12 110.553 C11 C15 H13 111.132
C11 C15 H14 111.132 H12 C15 H13 107.934
H12 C15 H14 107.934 H13 C15 H14 108.026
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability