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

using model chemistry: MP2/SDD

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/SDD
 hartrees
Energy at 0K-194.311395
Energy at 298.15K-194.318425
HF Energy-193.876732
Nuclear repulsion energy154.171364
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/SDD
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 3135 3027 35.83      
2 A1 3126 3017 9.06      
3 A1 3007 2903 57.46      
4 A1 1998 1928 10.09      
5 A1 1547 1493 0.78      
6 A1 1516 1463 4.60      
7 A1 1461 1410 0.03      
8 A1 1321 1275 13.34      
9 A1 1037 1001 6.87      
10 A1 710 686 0.00      
11 A1 344 332 0.22      
12 A2 3092 2985 0.00      
13 A2 1518 1465 0.00      
14 A2 1037 1001 0.00      
15 A2 630 608 0.00      
16 A2 144 139 0.00      
17 B1 3220 3108 14.17      
18 B1 3094 2987 65.09      
19 B1 1531 1477 21.01      
20 B1 1137 1098 0.39      
21 B1 1060 1023 0.02      
22 B1 456 441 0.40      
23 B1 249 241 8.85      
24 B1 177 171 1.95      
25 B2 3132 3024 23.86      
26 B2 3006 2902 28.37      
27 B2 1530 1477 7.74      
28 B2 1447 1396 9.45      
29 B2 1222 1179 8.64      
30 B2 995 960 0.09      
31 B2 912 880 75.08      
32 B2 592 571 11.77      
33 B2 175 169 1.55      

Unscaled Zero Point Vibrational Energy (zpe) 24778.0 cm-1
Scaled (by 0.9653) Zero Point Vibrational Energy (zpe) 23918.2 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/SDD
ABC
0.26692 0.11499 0.08438

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 2.297
C2 0.000 0.000 0.954
H3 -0.934 0.000 2.869
H4 0.934 0.000 2.869
C5 0.000 0.000 -0.388
C6 0.000 1.309 -1.202
C7 0.000 -1.309 -1.202
H8 0.000 2.191 -0.541
H9 0.000 -2.191 -0.541
H10 0.894 1.353 -1.853
H11 -0.894 1.353 -1.853
H12 -0.894 -1.353 -1.853
H13 0.894 -1.353 -1.853

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 C7 H8 H9 H10 H11 H12 H13
C11.34271.09581.09582.68463.73553.73553.58533.58534.45534.45534.45534.4553
C21.34272.13102.13101.34192.52212.52212.65272.65273.24183.24183.24183.2418
H31.09582.13101.86863.38854.37744.37744.15994.15995.24154.91244.91245.2415
H41.09582.13101.86863.38854.37744.37744.15994.15994.91245.24155.24154.9124
C52.68461.34193.38853.38851.54131.54132.19682.19682.18572.18572.18572.1857
C63.73552.52214.37744.37741.54132.61751.10283.56211.10681.10682.88282.8828
C73.73552.52214.37744.37741.54132.61753.56211.10282.88282.88281.10681.1068
H83.58532.65274.15994.15992.19681.10283.56214.38291.79521.79523.88413.8841
H93.58532.65274.15994.15992.19683.56211.10284.38293.88413.88411.79521.7952
H104.45533.24185.24154.91242.18571.10682.88281.79523.88411.78833.24422.7068
H114.45533.24184.91245.24152.18571.10682.88281.79523.88411.78832.70683.2442
H124.45533.24184.91245.24152.18572.88281.10683.88411.79523.24422.70681.7883
H134.45533.24185.24154.91242.18572.88281.10683.88411.79522.70683.24421.7883

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 121.503
C2 C1 H4 121.503 C2 C5 C6 121.883
C2 C5 C7 121.883 H3 C1 H4 116.995
C5 C6 H8 111.283 C5 C6 H10 110.171
C5 C6 H11 110.171 C5 C7 H9 111.283
C5 C7 H12 110.171 C5 C7 H13 110.171
C6 C5 C7 116.234 H8 C6 H10 108.675
H8 C6 H11 108.675 H9 C7 H12 108.675
H9 C7 H13 108.675 H10 C6 H11 107.777
H12 C7 H13 107.777
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability