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: PBEPBE/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBEPBE/6-31G(2df,p)
 hartrees
Energy at 0K-196.263431
Energy at 298.15K-196.273402
Nuclear repulsion energy169.984962
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 PBEPBE/6-31G(2df,p)
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' 3082 3050 29.26      
2 A' 3059 3027 27.24      
3 A' 3053 3022 23.70      
4 A' 3048 3017 10.76      
5 A' 2977 2946 20.13      
6 A' 2955 2924 36.08      
7 A' 2937 2906 31.61      
8 A' 1698 1681 0.18      
9 A' 1458 1443 4.47      
10 A' 1442 1427 8.22      
11 A' 1420 1406 2.60      
12 A' 1362 1347 5.90      
13 A' 1355 1341 0.08      
14 A' 1324 1311 10.97      
15 A' 1294 1281 0.62      
16 A' 1271 1258 0.19      
17 A' 1115 1104 0.47      
18 A' 1075 1064 7.66      
19 A' 999 989 2.62      
20 A' 933 924 8.78      
21 A' 843 834 0.10      
22 A' 567 561 0.97      
23 A' 352 348 0.22      
24 A' 196 194 0.32      
25 A" 3051 3019 26.37      
26 A" 3008 2977 19.23      
27 A" 2958 2928 17.32      
28 A" 1448 1433 5.50      
29 A" 1428 1413 5.02      
30 A" 1244 1231 0.08      
31 A" 1064 1053 1.36      
32 A" 1023 1013 0.07      
33 A" 984 973 19.31      
34 A" 799 791 2.57      
35 A" 687 680 0.58      
36 A" 293 290 1.77      
37 A" 225 223 0.01      
38 A" 198 196 2.33      
39 A" 129 128 0.06      

Unscaled Zero Point Vibrational Energy (zpe) 29176.8 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 28876.3 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 PBEPBE/6-31G(2df,p)
ABC
0.44252 0.08151 0.07159

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -0.721 -1.243 0.000
C2 -0.982 -0.177 0.000
H3 -0.281 1.800 0.000
C4 0.000 0.737 0.000
H5 -2.955 -0.289 0.884
H6 -2.955 -0.289 -0.884
H7 -2.628 1.227 0.000
C8 -2.449 0.140 0.000
H9 1.932 0.980 -0.875
H10 1.932 0.980 0.875
C11 1.482 0.470 0.000
H12 2.991 -1.105 0.000
H13 1.508 -1.528 0.890
H14 1.508 -1.528 -0.890
C15 1.894 -1.004 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 H6 H7 C8 H9 H10 C11 H12 H13 H14 C15
H11.09733.07422.10702.58452.58453.12042.21283.56993.56992.79063.71472.41732.41732.6263
C21.09732.09701.34122.16522.16522.16391.50103.25463.25462.54724.07942.96942.96942.9925
H33.07422.09701.09953.50653.50652.41602.73022.51732.51732.20874.37523.88213.88213.5489
C42.10701.34121.09953.25083.25082.67382.52072.13472.13471.50593.51232.86322.86322.5727
H52.58452.16523.50653.25081.76731.78521.10525.34675.04914.58766.06634.63204.95994.9807
H62.58452.16523.50653.25081.76731.78521.10525.04915.34674.58766.06634.95994.63204.9807
H73.12042.16392.41602.67381.78521.78521.10184.65014.65014.17966.08385.04925.04925.0430
C82.21281.50102.73022.52071.10521.10521.10184.54564.54563.94485.58034.38554.38554.4912
H93.56993.25462.51732.13475.34675.04914.65014.54561.75031.10832.49633.09602.54372.1687
H103.56993.25462.51732.13475.04915.34674.65014.54561.75031.10832.49632.54373.09602.1687
C112.79062.54722.20871.50594.58764.58764.17963.94481.10831.10832.18062.18752.18751.5305
H123.71474.07944.37523.51236.06636.06636.08385.58032.49632.49632.18061.78041.78041.1013
H132.41732.96943.88212.86324.63204.95995.04924.38553.09602.54372.18751.78041.77971.1026
H142.41732.96943.88212.86324.95994.63205.04924.38552.54373.09602.18751.78041.77971.1026
C152.62632.99253.54892.57274.98074.98075.04304.49122.16872.16871.53051.10131.10261.1026

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 119.217 H1 C2 C8 115.909
C2 C4 H3 118.117 C2 C4 C11 126.836
C2 C8 H5 111.458 C2 C8 H6 111.458
C2 C8 H7 111.557 H3 C4 C11 115.047
C4 C2 C8 124.875 C4 C11 H9 108.530
C4 C11 H10 108.530 C4 C11 C15 115.837
H5 C8 H6 106.175 H5 C8 H7 107.975
H6 C8 H7 107.975 H9 C11 H10 104.310
H9 C11 C15 109.501 H10 C11 C15 109.501
C11 C15 H12 110.851 C11 C15 H13 111.323
C11 C15 H14 111.323 H12 C15 H13 107.778
H12 C15 H14 107.778 H13 C15 H14 107.618
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.085      
2 C -0.026      
3 H 0.081      
4 C -0.041      
5 H 0.134      
6 H 0.134      
7 H 0.127      
8 C -0.463      
9 H 0.119      
10 H 0.119      
11 C -0.240      
12 H 0.121      
13 H 0.132      
14 H 0.132      
15 C -0.413      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.105 0.008 0.000 0.105
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.467 0.514 0.000
y 0.514 -32.113 0.000
z 0.000 0.000 -33.798
Traceless
 xyz
x 1.489 0.514 0.000
y 0.514 0.519 0.000
z 0.000 0.000 -2.008
Polar
3z2-r2-4.017
x2-y20.646
xy0.514
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 11.235 0.525 0.000
y 0.525 8.262 0.000
z 0.000 0.000 6.178


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