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

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-193.306658
Energy at 298.15K-193.313992
HF Energy-192.857692
Nuclear repulsion energy155.795689
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 MP2/3-21G*
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 3236 3078 4.79      
2 A 3171 3016 25.60      
3 A 3164 3010 13.98      
4 A 3163 3009 11.43      
5 A 3163 3009 12.07      
6 A 3109 2958 13.33      
7 A 3091 2940 14.74      
8 A 3076 2926 22.72      
9 A 2031 1932 9.83      
10 A 1603 1525 4.21      
11 A 1600 1522 6.13      
12 A 1588 1511 0.37      
13 A 1558 1482 1.13      
14 A 1495 1422 5.50      
15 A 1445 1374 8.34      
16 A 1370 1303 4.19      
17 A 1357 1291 0.00      
18 A 1179 1121 0.46      
19 A 1174 1117 2.06      
20 A 1114 1060 3.09      
21 A 1107 1053 0.24      
22 A 1007 958 0.52      
23 A 955 909 15.36      
24 A 940 894 64.03      
25 A 841 800 5.12      
26 A 834 793 1.03      
27 A 643 612 1.43      
28 A 543 516 6.49      
29 A 359 342 3.64      
30 A 290 276 5.62      
31 A 263 250 0.06      
32 A 148 141 0.37      
33 A 87 83 0.16      

Unscaled Zero Point Vibrational Energy (zpe) 25349.9 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 24115.3 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 MP2/3-21G*
ABC
0.33050 0.10729 0.08498

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.403 0.501 -0.000
C2 1.468 -1.046 0.000
C3 -0.031 1.040 0.000
C4 -1.112 0.288 -0.001
C5 -2.197 -0.459 0.000
H6 1.925 0.892 -0.883
H7 1.924 0.892 0.883
H8 0.967 -1.448 0.887
H9 2.510 -1.384 0.000
H10 0.967 -1.448 -0.886
H11 -0.136 2.125 0.002
H12 -2.669 -0.785 0.924
H13 -2.671 -0.785 -0.923

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.54831.53122.52373.72571.09821.09812.18442.18562.18442.23764.36834.3701
C21.54832.56852.90473.71202.17892.17871.09441.09521.09433.55404.24674.2487
C31.53122.56851.31712.63472.15062.15022.82283.51102.82311.09043.33793.3395
C42.52372.90471.31711.31763.21953.21992.85033.98922.84972.08002.10472.1049
C53.72573.71202.63471.31764.42694.42673.43184.79713.43203.30541.08721.0872
H61.09822.17892.15063.21954.42691.76643.08632.51082.52852.55925.21324.8922
H71.09812.17872.15023.21994.42671.76642.52822.51053.08602.55814.88995.2146
H82.18441.09442.82282.85033.43183.08632.52821.78031.77293.84253.69614.1171
H92.18561.09523.51103.98924.79712.51082.51051.78031.78034.39475.29445.2965
H102.18441.09432.82312.84973.43202.52853.08601.77291.78033.84334.11573.6985
H112.23763.55401.09042.08003.30542.55922.55813.84254.39473.84333.96603.9679
H124.36834.24673.33792.10471.08725.21324.88993.69615.29444.11573.96601.8470
H134.37014.24873.33952.10491.08724.89225.21464.11715.29653.69853.96791.8470

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 110.316 C1 C2 H9 110.361
C1 C2 H10 110.315 C1 C3 C4 124.586
C1 C3 H11 116.183 C2 C1 C3 113.032
C2 C1 H6 109.665 C2 C1 H7 109.648
C3 C1 H6 108.630 C3 C1 H7 108.602
C3 C4 C5 179.727 C4 C3 H11 119.231
C4 C5 H12 121.840 C4 C5 H13 121.861
H6 C1 H7 107.081 H8 C2 H9 108.797
H8 C2 H10 108.197 H9 C2 H10 108.799
H12 C5 H13 116.299
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability