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

using model chemistry: MP2/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-194.835088
Energy at 298.15K-194.842187
HF Energy-194.007349
Nuclear repulsion energy157.539629
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/cc-pVTZ
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 3180 3020 13.91      
2 A1 3164 3004 4.02      
3 A1 3061 2906 42.54      
4 A1 2047 1944 15.50      
5 A1 1526 1449 0.01      
6 A1 1481 1406 4.15      
7 A1 1413 1342 0.71      
8 A1 1319 1252 13.08      
9 A1 1029 977 6.14      
10 A1 744 706 0.08      
11 A1 335 318 0.08      
12 A2 3131 2973 0.00      
13 A2 1489 1413 0.00      
14 A2 1009 958 0.00      
15 A2 624 592 0.00      
16 A2 166 157 0.00      
17 B1 3250 3086 1.44      
18 B1 3131 2973 31.44      
19 B1 1504 1428 14.98      
20 B1 1100 1045 0.02      
21 B1 1023 972 0.87      
22 B1 444 421 0.29      
23 B1 259 246 5.09      
24 B1 186 177 1.55      
25 B2 3180 3019 10.71      
26 B2 3059 2905 16.63      
27 B2 1498 1422 6.08      
28 B2 1398 1328 5.54      
29 B2 1239 1176 4.37      
30 B2 976 927 0.16      
31 B2 872 828 48.53      
32 B2 594 564 10.62      
33 B2 178 169 0.47      

Unscaled Zero Point Vibrational Energy (zpe) 24804.3 cm-1
Scaled (by 0.9495) Zero Point Vibrational Energy (zpe) 23551.7 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/cc-pVTZ
ABC
0.27781 0.12076 0.08845

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 2.241
C2 0.000 0.000 0.931
H3 -0.925 0.000 2.803
H4 0.925 0.000 2.803
C5 0.000 0.000 -0.380
C6 0.000 1.280 -1.171
C7 0.000 -1.280 -1.171
H8 0.000 2.150 -0.519
H9 0.000 -2.150 -0.519
H10 0.879 1.326 -1.816
H11 -0.879 1.326 -1.816
H12 -0.879 -1.326 -1.816
H13 0.879 -1.326 -1.816

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 C7 H8 H9 H10 H11 H12 H13
C11.31051.08251.08252.62123.64493.64493.49863.49864.35774.35774.35774.3577
C21.31052.08872.08871.31072.46142.46142.59292.59293.17393.17393.17393.1739
H31.08252.08871.85013.31514.27724.27724.06394.06395.13324.80584.80585.1332
H41.08252.08871.85013.31514.27724.27724.06394.06394.80585.13325.13324.8058
C52.62121.31073.31513.31511.50531.50532.15432.15432.14292.14292.14292.1429
C63.64492.46144.27724.27721.50532.56091.08693.49171.09121.09122.82492.8249
C73.64492.46144.27724.27721.50532.56093.49171.08692.82492.82491.09121.0912
H83.49862.59294.06394.06392.15431.08693.49174.29961.77041.77043.81233.8123
H93.49862.59294.06394.06392.15433.49171.08694.29963.81233.81231.77041.7704
H104.35773.17395.13324.80582.14291.09122.82491.77043.81231.75883.18162.6512
H114.35773.17394.80585.13322.14291.09122.82491.77043.81231.75882.65123.1816
H124.35773.17394.80585.13322.14292.82491.09123.81231.77043.18162.65121.7588
H134.35773.17395.13324.80582.14292.82491.09123.81231.77042.65123.18161.7588

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 121.288
C2 C1 H4 121.288 C2 C5 C6 121.717
C2 C5 C7 121.717 H3 C1 H4 117.423
C5 C6 H8 111.395 C5 C6 H10 110.222
C5 C6 H11 110.222 C5 C7 H9 111.395
C5 C7 H12 110.222 C5 C7 H13 110.222
C6 C5 C7 116.565 H8 C6 H10 108.746
H8 C6 H11 108.746 H9 C7 H12 108.746
H9 C7 H13 108.746 H10 C6 H11 107.404
H12 C7 H13 107.404
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability