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All results from a given calculation for C5H8 (Cyclopentene)

using model chemistry: QCISD/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/cc-pVDZ
 hartrees
Energy at 0K-194.735327
Energy at 298.15K-194.744332
HF Energy-193.990189
Nuclear repulsion energy170.198934
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/cc-pVDZ
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' 3233 3102 21.17      
2 A' 3132 3005 44.65      
3 A' 3104 2978 38.32      
4 A' 3071 2946 20.06      
5 A' 3042 2918 29.06      
6 A' 1692 1624 1.38      
7 A' 1506 1445 0.79      
8 A' 1478 1418 1.47      
9 A' 1346 1291 0.10      
10 A' 1240 1189 1.15      
11 A' 1124 1079 0.10      
12 A' 1076 1032 6.25      
13 A' 989 949 0.96      
14 A' 929 891 0.37      
15 A' 840 806 0.48      
16 A' 717 688 29.38      
17 A' 596 572 7.16      
18 A' 180 172 0.10      
19 A" 3206 3076 6.52      
20 A" 3101 2975 26.54      
21 A" 3043 2920 54.63      
22 A" 1488 1427 0.54      
23 A" 1392 1335 1.02      
24 A" 1341 1286 1.19      
25 A" 1306 1253 0.83      
26 A" 1234 1184 0.00      
27 A" 1149 1102 1.61      
28 A" 1054 1011 1.53      
29 A" 956 917 0.18      
30 A" 931 893 6.07      
31 A" 898 862 1.25      
32 A" 777 745 0.18      
33 A" 388 372 0.05      

Unscaled Zero Point Vibrational Energy (zpe) 25779.6 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 24732.9 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/cc-pVDZ
ABC
0.24095 0.23861 0.13079

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.321 -1.189 0.000
C2 -0.083 -0.339 1.233
C3 -0.083 -0.339 -1.233
C4 -0.083 1.077 0.675
C5 -0.083 1.077 -0.675
H6 1.419 -1.319 0.000
H7 -0.134 -2.195 0.000
H8 -1.095 -0.604 1.600
H9 -1.095 -0.604 -1.600
H10 -0.128 1.973 1.304
H11 -0.128 1.973 -1.304
H12 0.611 -0.471 -2.084
H13 0.611 -0.471 2.084

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.55181.55182.39862.39861.10621.10392.21582.21583.45023.45022.22352.2235
C21.55182.46691.52162.37582.17692.22941.10953.02112.31333.43283.39191.1055
C31.55182.46692.37581.52162.17692.22943.02111.10953.43282.31331.10553.3919
C42.39861.52162.37581.34962.90713.34102.16983.00471.09612.17273.23842.2050
C52.39862.37581.52161.34962.90713.34103.00472.16982.17271.09612.20503.2384
H61.10622.17692.17692.90712.90711.78373.06543.06543.86463.86462.39102.3910
H71.10392.22942.22943.34103.34101.78372.45262.45264.36744.36742.80572.8057
H82.21581.10953.02112.16983.00473.06542.45263.20092.76884.00164.06271.7784
H92.21583.02111.10953.00472.16983.06542.45263.20094.00162.76881.77844.0627
H103.45022.31333.43281.09612.17273.86464.36742.76884.00162.60764.24242.6700
H113.45023.43282.31332.17271.09613.86464.36744.00162.76882.60762.67004.2424
H122.22353.39191.10553.23842.20502.39102.80574.06271.77844.24242.67004.1683
H132.22351.10553.39192.20503.23842.39102.80571.77844.06272.67004.24244.1683

picture of Cyclopentene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 102.601 C1 C2 H8 111.654
C1 C2 H13 112.522 C1 C3 C5 102.601
C1 C3 H9 111.654 C1 C3 H12 112.522
C2 C1 C3 105.282 C2 C1 H6 108.813
C2 C1 H7 113.094 C2 C4 C5 111.540
C2 C4 H10 123.374 C3 C1 H6 108.813
C3 C1 H7 113.094 C3 C5 C4 111.540
C3 C5 H11 123.374 C4 C2 H8 110.131
C4 C2 H13 113.192 C4 C5 H11 125.019
C5 C3 H9 110.131 C5 C3 H12 113.192
C5 C4 H10 125.019 H6 C1 H7 107.628
H8 C2 H13 106.818 H9 C3 H12 106.818
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability