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

using model chemistry: MP2/CEP-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 MP2/CEP-31G
 hartrees
Energy at 0K-32.337084
Energy at 298.15K-32.343890
HF Energy-31.935557
Nuclear repulsion energy80.366364
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-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 3146 3040 35.05      
2 A 3132 3027 1.73      
3 A 3116 3011 50.69      
4 A 3026 2924 17.77      
5 A 1530 1479 3.52      
6 A 1508 1457 9.11      
7 A 1454 1405 3.20      
8 A 1437 1388 0.03      
9 A 1173 1133 0.01      
10 A 1115 1078 2.96      
11 A 1086 1049 0.08      
12 A 913 882 39.16      
13 A 811 784 0.02      
14 A 483 466 4.18      
15 A 281 271 1.33      
16 A 150 145 0.21      
17 A 125 121 2.67      
18 A 3148 3042 93.17      
19 A 3132 3026 2.57      
20 A 3116 3011 52.66      
21 A 3025 2923 97.71      
22 A 1979 1913 3.51      
23 A 1523 1472 9.81      
24 A 1507 1456 8.87      
25 A 1451 1402 4.01      
26 A 1339 1294 13.68      
27 A 1117 1080 8.30      
28 A 1083 1046 0.91      
29 A 971 938 9.85      
30 A 711 687 37.33      
31 A 523 505 9.13      
32 A 193 186 1.77      
33 A 136 132 1.72      

Unscaled Zero Point Vibrational Energy (zpe) 24719.0 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 23885.9 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 MP2/CEP-31G
ABC
0.54089 0.06973 0.06745

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.427
C2 0.000 1.368 0.429
C3 0.000 -1.368 0.429
C4 -0.911 2.235 -0.477
C5 0.911 -2.235 -0.477
H6 0.685 1.897 1.116
H7 -0.685 -1.897 1.116
H8 -1.572 2.883 0.139
H9 -0.299 2.898 -1.128
H10 -1.546 1.595 -1.122
H11 1.572 -2.883 0.139
H12 0.299 -2.898 -1.128
H13 1.546 -1.595 -1.122

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.36801.36802.57762.57762.13162.13163.29673.30262.70843.29673.30262.7084
C21.36802.73611.55023.82561.10543.40632.20272.20372.20194.54204.55123.6849
C31.36802.73613.82561.55023.40631.10544.54204.55123.68492.20272.20372.2019
C42.57761.55023.82564.82772.28064.43471.11221.11231.10875.72245.31414.5966
C52.57763.82561.55024.82774.43472.28065.72245.31414.59661.11221.11231.1087
H62.13161.10543.40632.28064.43474.03432.65042.64763.17504.95915.30844.2364
H72.13163.40631.10544.43472.28064.03434.95915.30844.23642.65042.64763.1750
H83.29672.20274.54201.11225.72242.65044.95911.79661.80276.56826.20745.6013
H93.30262.20374.55121.11235.31412.64765.30841.79661.80326.20745.82664.8575
H102.70842.20193.68491.10874.59663.17504.23641.80271.80325.60134.85754.4435
H113.29674.54202.20275.72241.11224.95912.65046.56826.20745.60131.79661.8027
H123.30264.55122.20375.31411.11235.30842.64766.20745.82664.85751.79661.8032
H132.70843.68492.20194.59661.10874.23643.17505.60134.85754.44351.80271.8032

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 123.962 C1 C2 H6 118.658
C1 C3 C5 123.962 C1 C3 H7 118.658
C2 C1 C3 179.825 C2 C4 H8 110.577
C2 C4 H9 110.644 C2 C4 H10 110.717
C3 C5 H11 110.577 C3 C5 H12 110.644
C3 C5 H13 110.717 C4 C2 H6 117.381
C5 C3 H7 117.381 H8 C4 H9 107.733
H8 C4 H10 108.522 H9 C4 H10 108.558
H11 C5 H12 107.733 H11 C5 H13 108.522
H12 C5 H13 108.558
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability