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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-32.399347
Energy at 298.15K-32.406275
HF Energy-31.956880
Nuclear repulsion energy81.178863
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 3095 3021 28.73      
2 A 3077 3004 0.96      
3 A 3055 2981 35.86      
4 A 2962 2891 15.92      
5 A 1534 1497 3.22      
6 A 1503 1467 6.73      
7 A 1453 1418 3.77      
8 A 1431 1397 0.19      
9 A 1168 1140 0.03      
10 A 1113 1087 2.89      
11 A 1088 1062 0.98      
12 A 924 902 28.43      
13 A 805 786 0.02      
14 A 514 502 5.52      
15 A 291 284 0.88      
16 A 144 141 1.20      
17 A 129 126 1.28      
18 A 3097 3022 61.09      
19 A 3077 3003 14.01      
20 A 3055 2982 36.41      
21 A 2961 2890 87.54      
22 A 1959 1912 4.22      
23 A 1529 1493 8.22      
24 A 1502 1466 7.29      
25 A 1450 1416 4.69      
26 A 1341 1309 14.52      
27 A 1117 1090 5.10      
28 A 1087 1061 2.26      
29 A 966 942 7.47      
30 A 721 703 22.76      
31 A 555 541 12.36      
32 A 207 202 2.17      
33 A 131 128 0.85      

Unscaled Zero Point Vibrational Energy (zpe) 24520.5 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 23932.0 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
0.55057 0.07133 0.06894

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 0.426
C2 0.000 1.345 0.426
C3 0.000 -1.345 0.426
C4 -0.900 2.214 -0.474
C5 0.900 -2.214 -0.474
H6 0.680 1.874 1.106
H7 -0.680 -1.874 1.106
H8 -1.547 2.867 0.138
H9 -0.290 2.859 -1.130
H10 -1.541 1.577 -1.105
H11 1.547 -2.867 0.138
H12 0.290 -2.859 -1.130
H13 1.541 -1.577 -1.105

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.34491.34492.55392.55392.10622.10623.27073.26812.68433.27073.26812.6843
C21.34492.68971.54103.77951.09803.35942.18952.19032.18404.49634.49193.6406
C31.34492.68973.77951.54103.35941.09804.49634.49193.64062.18952.19032.1840
C42.55391.54103.77954.78002.26064.38791.10431.10431.10175.67285.25184.5529
C52.55393.77951.54104.78004.38792.26065.67285.25184.55291.10431.10431.1017
H62.10621.09803.35942.26064.38793.98692.62432.62943.14794.91575.24904.1876
H72.10623.35941.09804.38792.26063.98694.91575.24904.18762.62432.62943.1479
H83.27072.18954.49631.10435.67282.62434.91571.78591.79116.51586.14585.5526
H93.26812.19034.49191.10435.25182.62945.24901.78591.79126.14585.74724.7991
H102.68432.18403.64061.10174.55293.14794.18761.79111.79125.55264.79914.4098
H113.27074.49632.18955.67281.10434.91572.62436.51586.14585.55261.78591.7911
H123.26814.49192.19035.25181.10435.24902.62946.14585.74724.79911.78591.7912
H132.68433.64062.18404.55291.10174.18763.14795.55264.79914.40981.79111.7912

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 124.350 C1 C2 H6 118.772
C1 C3 C5 124.350 C1 C3 H7 118.772
C2 C1 C3 179.942 C2 C4 H8 110.642
C2 C4 H9 110.703 C2 C4 H10 110.360
C3 C5 H11 110.642 C3 C5 H12 110.703
C3 C5 H13 110.360 C4 C2 H6 116.878
C5 C3 H7 116.878 H8 C4 H9 107.920
H8 C4 H10 108.566 H9 C4 H10 108.571
H11 C5 H12 107.920 H11 C5 H13 108.566
H12 C5 H13 108.571
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability