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All results from a given calculation for C5H8 (1,2-Pentadiene)

using model chemistry: CISD/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 CISD/6-31G*
 hartrees
Energy at 0K-194.509710
Energy at 298.15K-194.517237
HF Energy-193.933416
Nuclear repulsion energy157.070336
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 CISD/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 3340 3092 5.08      
2 A 3262 3020 4.02      
3 A 3259 3017 11.86      
4 A 3242 3001 32.28      
5 A 3237 2997 34.51      
6 A 3172 2936 21.37      
7 A 3162 2927 18.64      
8 A 3141 2908 39.09      
9 A 2166 2006 26.23      
10 A 1597 1478 3.94      
11 A 1590 1472 6.38      
12 A 1587 1469 0.47      
13 A 1572 1456 1.98      
14 A 1516 1403 4.33      
15 A 1461 1353 15.91      
16 A 1438 1331 0.16      
17 A 1362 1261 0.10      
18 A 1216 1126 0.79      
19 A 1177 1090 2.81      
20 A 1156 1070 3.67      
21 A 1088 1007 0.18      
22 A 1050 972 0.39      
23 A 962 891 14.02      
24 A 944 874 56.92      
25 A 900 833 1.36      
26 A 835 773 2.94      
27 A 668 619 2.77      
28 A 555 514 3.87      
29 A 382 354 2.53      
30 A 356 330 5.55      
31 A 271 251 0.01      
32 A 161 149 0.20      
33 A 99 91 0.18      

Unscaled Zero Point Vibrational Energy (zpe) 25962.2 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 24035.8 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 CISD/6-31G*
ABC
0.34236 0.10742 0.08576

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.376 0.501 -0.000
C2 1.496 -1.016 0.000
C3 -0.043 1.014 0.000
C4 -1.116 0.272 -0.001
C5 -2.192 -0.464 0.000
H6 1.890 0.914 -0.871
H7 1.891 0.914 0.870
H8 1.019 -1.445 0.880
H9 2.543 -1.316 -0.001
H10 1.018 -1.446 -0.879
H11 -0.169 2.092 0.001
H12 -2.657 -0.782 0.923
H13 -2.659 -0.781 -0.922

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.52191.50852.50163.69551.09281.09282.16602.16032.16602.21704.33164.3330
C21.52192.54742.91163.72862.15372.15381.08891.08921.08893.52544.26094.2625
C31.50852.54741.30412.60782.12342.12352.81983.48122.81971.08483.30313.3044
C42.50162.91161.30411.30373.19463.19572.87773.98822.87632.05092.08352.0836
C53.69553.72862.60781.30374.39564.39633.47084.81063.46963.25881.08141.0814
H61.09282.15372.12343.19464.39561.74183.06462.48152.51582.52815.17464.8556
H71.09282.15382.12353.19574.39631.74182.51572.48173.06472.52754.85495.1764
H82.16601.08892.81982.87773.47083.06462.51571.76451.75863.83333.73604.1492
H92.16031.08923.48123.98824.81062.48152.48171.76451.76454.35555.30845.3099
H102.16601.08892.81972.87633.46962.51583.06471.75861.76453.83374.14653.7369
H112.21703.52541.08482.05093.25882.52812.52753.83334.35553.83373.91103.9124
H124.33164.26093.30312.08351.08145.17464.85493.73605.30844.14653.91101.8445
H134.33304.26253.30442.08361.08144.85565.17644.14925.30993.73693.91241.8445

picture of 1,2-Pentadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H8 111.026 C1 C2 H9 110.556
C1 C2 H10 111.030 C1 C3 C4 125.441
C1 C3 H11 116.552 C2 C1 C3 114.406
C2 C1 H6 109.819 C2 C1 H7 109.824
C3 C1 H6 108.370 C3 C1 H7 108.371
C3 C4 C5 179.662 C4 C3 H11 118.006
C4 C5 H12 121.469 C4 C5 H13 121.485
H6 C1 H7 105.671 H8 C2 H9 108.205
H8 C2 H10 107.700 H9 C2 H10 108.204
H12 C5 H13 117.046
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability