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All results from a given calculation for C5H8 (1,2-Butadiene, 3-methyl-)

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 C2V 1A1
Energy calculated at MP2/CEP-31G
 hartrees
Energy at 0K-32.339945
Energy at 298.15K-32.346834
HF Energy-31.934688
Nuclear repulsion energy82.833491
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 A1 3143 3037 48.92      
2 A1 3131 3025 16.89      
3 A1 3018 2916 73.44      
4 A1 1980 1913 6.57      
5 A1 1537 1485 0.34      
6 A1 1506 1455 2.21      
7 A1 1456 1407 0.06      
8 A1 1314 1270 15.75      
9 A1 1036 1001 7.36      
10 A1 713 689 0.00      
11 A1 335 324 0.07      
12 A2 3107 3002 0.00      
13 A2 1504 1454 0.00      
14 A2 1035 1001 0.00      
15 A2 615 594 0.00      
16 A2 150 145 0.00      
17 B1 3228 3119 22.04      
18 B1 3109 3004 102.23      
19 B1 1515 1464 21.42      
20 B1 1131 1093 0.13      
21 B1 1039 1004 0.09      
22 B1 420 406 2.24      
23 B1 226 219 7.63      
24 B1 167 161 1.85      
25 B2 3141 3035 29.40      
26 B2 3018 2916 38.03      
27 B2 1517 1466 6.25      
28 B2 1439 1391 4.80      
29 B2 1235 1193 7.54      
30 B2 992 959 0.49      
31 B2 872 843 82.95      
32 B2 556 537 7.45      
33 B2 163 158 1.25      

Unscaled Zero Point Vibrational Energy (zpe) 24672.7 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 23841.3 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/CEP-31G
ABC
0.26345 0.11133 0.08210

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 2.339
C2 0.000 0.000 0.968
H3 -0.943 0.000 2.911
H4 0.943 0.000 2.911
C5 0.000 0.000 -0.400
C6 0.000 1.318 -1.221
C7 0.000 -1.318 -1.221
H8 0.000 2.205 -0.556
H9 0.000 -2.205 -0.556
H10 0.898 1.361 -1.877
H11 -0.898 1.361 -1.877
H12 -0.898 -1.361 -1.877
H13 0.898 -1.361 -1.877

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 C7 H8 H9 H10 H11 H12 H13
C11.37171.10281.10282.73903.79623.79623.63953.63954.52044.52044.52044.5204
C21.37172.16002.16001.36742.55462.55462.68012.68013.27863.27863.27863.2786
H31.10282.16001.88623.44234.43824.43824.21574.21575.30694.97754.97755.3069
H41.10282.16001.88623.44234.43824.43824.21574.21574.97755.30695.30694.9775
C52.73901.36743.44233.44231.55271.55272.21012.21012.20022.20022.20022.2002
C63.79622.55464.43824.43821.55272.63551.10803.58441.11301.11302.90072.9007
C73.79622.55464.43824.43821.55272.63553.58441.10802.90072.90071.11301.1130
H83.63952.68014.21574.21572.21011.10803.58444.40911.80571.80573.90693.9069
H93.63952.68014.21574.21572.21013.58441.10804.40913.90693.90691.80571.8057
H104.52043.27865.30694.97752.20021.11302.90071.80573.90691.79643.26172.7224
H114.52043.27864.97755.30692.20021.11302.90071.80573.90691.79642.72243.2617
H124.52043.27864.97755.30692.20022.90071.11303.90691.80573.26172.72241.7964
H134.52043.27865.30694.97752.20022.90071.11303.90691.80572.72243.26171.7964

picture of 1,2-Butadiene, 3-methyl- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C5 180.000 C2 C1 H3 121.219
C2 C1 H4 121.219 C2 C5 C6 121.928
C2 C5 C7 121.928 H3 C1 H4 117.562
C5 C6 H8 111.234 C5 C6 H10 110.167
C5 C6 H11 110.167 C5 C7 H9 111.234
C5 C7 H12 110.167 C5 C7 H13 110.167
C6 C5 C7 116.145 H8 C6 H10 108.786
H8 C6 H11 108.786 H9 C7 H12 108.786
H9 C7 H13 108.786 H10 C6 H11 107.612
H12 C7 H13 107.612
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability