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, (Z)-)

using model chemistry: HF/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 HF/6-31G*
 hartrees
Energy at 0K-195.142286
Energy at 298.15K-195.152613
HF Energy-195.142286
Nuclear repulsion energy171.567906
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 HF/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 3331 2993 70.76      
2 A 3303 2968 22.35      
3 A 3298 2963 26.51      
4 A 3272 2940 57.03      
5 A 3266 2934 50.15      
6 A 3250 2920 7.56      
7 A 3238 2909 39.17      
8 A 3201 2876 30.66      
9 A 3196 2872 46.74      
10 A 3190 2866 44.28      
11 A 1903 1710 1.42      
12 A 1653 1485 4.35      
13 A 1643 1476 4.48      
14 A 1641 1475 1.75      
15 A 1632 1466 3.52      
16 A 1630 1464 2.41      
17 A 1585 1424 2.63      
18 A 1561 1402 0.92      
19 A 1553 1396 2.62      
20 A 1475 1325 12.71      
21 A 1420 1275 0.04      
22 A 1397 1255 0.10      
23 A 1278 1148 0.19      
24 A 1199 1077 4.65      
25 A 1181 1061 2.84      
26 A 1144 1028 0.02      
27 A 1127 1013 0.52      
28 A 1098 986 2.02      
29 A 1002 901 6.62      
30 A 923 829 1.28      
31 A 860 773 5.60      
32 A 793 712 28.47      
33 A 608 547 5.09      
34 A 511 459 1.03      
35 A 325 292 0.03      
36 A 282 253 0.03      
37 A 235 211 0.01      
38 A 134 120 0.21      
39 A 58 52 0.06      

Unscaled Zero Point Vibrational Energy (zpe) 32196.3 cm-1
Scaled (by 0.8985) Zero Point Vibrational Energy (zpe) 28928.4 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 HF/6-31G*
ABC
0.37350 0.08564 0.07845

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.188 -0.283 -0.412
H2 2.662 0.684 -0.549
H3 2.942 -0.974 -0.052
H4 1.851 -0.626 -1.384
C5 1.018 -0.189 0.572
H6 0.583 -1.171 0.708
H7 1.402 0.111 1.545
C8 -2.072 -0.671 -0.083
H9 -2.513 -0.895 -1.050
H10 -1.473 -1.521 0.212
H11 -2.894 -0.584 0.623
C12 -0.016 0.811 0.130
H13 0.354 1.818 0.021
C14 -1.292 0.612 -0.144
H15 -1.865 1.471 -0.451

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 H6 H7 C8 H9 H10 H11 C12 H13 C14 H15
C11.08541.08471.08451.53122.14862.14464.28994.78283.91435.19442.51932.82173.60254.4160
H21.08541.75311.75232.17273.05612.50944.94615.43344.74735.81792.76602.63403.97514.5959
H31.08471.75311.75672.16992.48632.46975.02345.54604.45675.88783.46013.80774.52215.4079
H41.08451.75231.75672.17002.50573.05284.13314.38443.79405.15162.80013.19143.59794.3674
C51.53122.17272.16992.17001.08221.08803.19503.94892.84743.93191.50492.18452.54713.4802
H62.14863.05612.48632.50571.08221.73612.81503.57082.14383.52702.14943.07502.72353.7834
H72.14462.50942.46973.05281.08801.73613.91514.80313.56444.44822.12202.51633.21824.0622
C84.28994.94615.02344.13313.19502.81503.91511.08651.08071.08662.54283.47711.50272.1834
H94.78285.43345.54604.38443.94893.57084.80311.08651.75091.74393.24544.08952.14072.5254
H103.91434.74734.45673.79402.84742.14383.56441.08071.75091.75072.75043.81072.16973.0895
H115.19445.81795.88785.15163.93193.52704.44821.08661.74391.75073.23554.08422.14122.5369
C122.51932.76603.46012.80011.50492.14942.12202.54283.24542.75043.23551.07861.31942.0468
H132.82172.63403.80773.19142.18453.07502.51633.47714.08953.81074.08421.07862.04702.2947
C143.60253.97514.52213.59792.54712.72353.21821.50272.14072.16972.14121.31942.04701.0776
H154.41604.59595.40794.36743.48023.78344.06222.18342.52543.08952.53692.04682.29471.0776

picture of 2-Pentene, (Z)- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C5 H6 109.396 C1 C5 H7 108.750
C1 C5 C12 112.148 H2 C1 H3 107.774
H2 C1 H4 107.719 H2 C1 C5 111.129
H3 C1 H4 108.161 H3 C1 C5 110.949
H4 C1 C5 110.966 C5 C12 H13 114.452
C5 C12 C14 128.683 H6 C5 H7 106.254
H6 C5 C12 111.311 H7 C5 C12 108.778
C8 C14 C12 128.478 C8 C14 H15 114.598
H9 C8 H10 107.784 H9 C8 H11 106.736
H9 C8 C14 110.510 H10 C8 H11 107.761
H10 C8 C14 113.241 H11 C8 C14 110.543
C12 C14 H15 116.924 H13 C12 C14 116.864
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.477      
2 H 0.157      
3 H 0.160      
4 H 0.165      
5 C -0.343      
6 H 0.168      
7 H 0.166      
8 C -0.514      
9 H 0.169      
10 H 0.171      
11 H 0.170      
12 C -0.163      
13 H 0.170      
14 C -0.170      
15 H 0.170      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.018 -0.157 0.036 0.162
CHELPG -0.039 -0.167 0.025 0.174
AIM        
ESP -0.036 -0.184 0.018 0.189


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.376 0.267 0.876
y 0.267 -32.691 -0.384
z 0.876 -0.384 -34.654
Traceless
 xyz
x 1.296 0.267 0.876
y 0.267 0.824 -0.384
z 0.876 -0.384 -2.120
Polar
3z2-r2-4.240
x2-y20.315
xy0.267
xz0.876
yz-0.384


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 10.321 0.358 0.710
y 0.358 6.947 -0.141
z 0.710 -0.141 5.831


<r2> (average value of r2) Å2
<r2> 165.216
(<r2>)1/2 12.854