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All results from a given calculation for C5H8 (2,3-Pentadiene)

using model chemistry: MP2/CEP-121G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP2/CEP-121G*
 hartrees
Energy at 0K-32.687574
Energy at 298.15K-32.694528
HF Energy-32.044332
Nuclear repulsion energy82.244824
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/CEP-121G*
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 3181 3031 13.25      
2 A 3162 3013 3.68      
3 A 3144 2996 23.68      
4 A 3061 2916 10.62      
5 A 1540 1467 3.88      
6 A 1518 1447 6.60      
7 A 1455 1386 1.11      
8 A 1439 1371 1.95      
9 A 1169 1113 0.03      
10 A 1105 1053 2.01      
11 A 1074 1024 0.48      
12 A 895 852 28.82      
13 A 829 790 0.00      
14 A 536 511 5.20      
15 A 285 272 1.10      
16 A 156 149 0.61      
17 A 134 128 1.55      
18 A 3181 3031 42.04      
19 A 3162 3012 2.40      
20 A 3144 2996 24.02      
21 A 3060 2916 69.23      
22 A 2010 1915 3.99      
23 A 1532 1459 9.55      
24 A 1517 1446 7.26      
25 A 1441 1373 5.04      
26 A 1322 1259 18.30      
27 A 1120 1067 2.71      
28 A 1071 1021 2.06      
29 A 974 928 9.12      
30 A 691 658 21.94      
31 A 572 545 13.50      
32 A 220 210 1.49      
33 A 140 133 0.91      

Unscaled Zero Point Vibrational Energy (zpe) 24918.9 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 23742.7 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/CEP-121G*
ABC
0.55662 0.07386 0.07133

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.451
C2 0.000 1.325 0.446
C3 0.000 -1.325 0.446
C4 -0.893 2.168 -0.448
C5 0.893 -2.168 -0.448
H6 0.677 1.850 1.123
H7 -0.677 -1.850 1.123
H8 -1.538 2.818 0.156
H9 -0.289 2.811 -1.100
H10 -1.525 1.530 -1.072
H11 1.538 -2.818 0.156
H12 0.289 -2.811 -1.100
H13 1.525 -1.530 -1.072

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.32511.32512.51152.51152.08182.08183.22383.22312.64283.22383.22312.6428
C21.32512.65021.51933.71511.09203.31662.16272.16342.16124.42884.42483.5751
C31.32512.65023.71511.51933.31661.09204.42884.42483.57512.16272.16342.1612
C42.51151.51933.71514.69042.24394.32021.09631.09631.09325.58025.15914.4626
C52.51153.71511.51934.69044.32022.24395.58025.15914.46261.09631.09631.0932
H62.08181.09203.31662.24394.32023.94072.60332.60693.12524.84455.17844.1186
H72.08183.31661.09204.32022.24393.94074.84455.17844.11862.60332.60693.1252
H83.22382.16274.42881.09635.58022.60334.84451.77031.77936.42056.04975.4582
H93.22312.16344.42481.09635.15912.60695.17841.77031.77956.04975.65154.7050
H102.64282.16123.57511.09324.46263.12524.11861.77931.77955.45824.70504.3201
H113.22384.42882.16275.58021.09634.84452.60336.42056.04975.45821.77031.7793
H123.22314.42482.16345.15911.09635.17842.60696.04975.65154.70501.77031.7795
H132.64283.57512.16124.46261.09324.11863.12525.45824.70504.32011.77931.7795

picture of 2,3-Pentadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 123.857 C1 C2 H6 118.604
C1 C3 C5 123.857 C1 C3 H7 118.604
C2 C1 C3 179.597 C2 C4 H8 110.509
C2 C4 H9 110.558 C2 C4 H10 110.568
C3 C5 H11 110.509 C3 C5 H12 110.558
C3 C5 H13 110.568 C4 C2 H6 117.539
C5 C3 H7 117.539 H8 C4 H9 107.685
H8 C4 H10 108.714 H9 C4 H10 108.728
H11 C5 H12 107.685 H11 C5 H13 108.714
H12 C5 H13 108.728
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability