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

using model chemistry: LSDA/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at LSDA/3-21G*
 hartrees
Energy at 0K-193.117008
Energy at 298.15K-193.124036
Nuclear repulsion energy157.344760
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 LSDA/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 A1 3089 3033 5.74      
2 A1 3052 2997 2.82      
3 A1 2968 2915 32.19      
4 A1 2079 2042 20.81      
5 A1 1513 1486 0.59      
6 A1 1460 1434 9.80      
7 A1 1394 1369 1.30      
8 A1 1319 1295 14.50      
9 A1 1020 1002 12.01      
10 A1 744 731 0.03      
11 A1 333 327 0.48      
12 A2 3026 2972 0.00      
13 A2 1471 1444 0.00      
14 A2 999 981 0.00      
15 A2 612 601 0.00      
16 A2 176 173 0.00      
17 B1 3120 3064 2.52      
18 B1 3027 2972 22.84      
19 B1 1490 1463 30.81      
20 B1 1091 1071 6.14      
21 B1 1020 1002 0.64      
22 B1 434 426 1.25      
23 B1 252 247 5.55      
24 B1 184 181 3.25      
25 B2 3088 3033 7.99      
26 B2 2966 2912 7.92      
27 B2 1475 1448 11.35      
28 B2 1377 1352 19.54      
29 B2 1203 1182 5.99      
30 B2 965 947 1.14      
31 B2 876 860 74.49      
32 B2 595 585 7.69      
33 B2 175 172 0.66      

Unscaled Zero Point Vibrational Energy (zpe) 24296.0 cm-1
Scaled (by 0.982) Zero Point Vibrational Energy (zpe) 23858.7 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 LSDA/3-21G*
ABC
0.28068 0.12024 0.08857

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 2.238
C2 0.000 0.000 0.935
H3 -0.932 0.000 2.819
H4 0.932 0.000 2.819
C5 0.000 0.000 -0.374
C6 0.000 1.271 -1.173
C7 0.000 -1.271 -1.173
H8 0.000 2.159 -0.521
H9 0.000 -2.159 -0.521
H10 0.892 1.309 -1.828
H11 -0.892 1.309 -1.828
H12 -0.892 -1.309 -1.828
H13 0.892 -1.309 -1.828

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 C7 H8 H9 H10 H11 H12 H13
C11.30311.09811.09812.61193.64063.64063.50293.50294.36384.36384.36384.3638
C21.30312.10192.10191.30882.46192.46192.60372.60373.18483.18483.18483.1848
H31.09812.10191.86383.32604.29214.29214.08434.08435.16094.82794.82795.1609
H41.09812.10191.86383.32604.29214.29214.08434.08434.82795.16095.16094.8279
C52.61191.30883.32603.32601.50191.50192.16392.16392.15032.15032.15032.1503
C63.64062.46194.29214.29211.50192.54291.10173.49191.10751.10752.80762.8076
C73.64062.46194.29214.29211.50192.54293.49191.10172.80762.80761.10751.1075
H83.50292.60374.08434.08432.16391.10173.49194.31791.79691.79693.81193.8119
H93.50292.60374.08434.08432.16393.49191.10174.31793.81193.81191.79691.7969
H104.36383.18485.16094.82792.15031.10752.80761.79693.81191.78493.16812.6175
H114.36383.18484.82795.16092.15031.10752.80761.79693.81191.78492.61753.1681
H124.36383.18484.82795.16092.15032.80761.10753.81191.79693.16812.61751.7849
H134.36383.18485.16094.82792.15032.80761.10753.81191.79692.61753.16811.7849

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 121.936
C2 C1 H4 121.936 C2 C5 C6 122.159
C2 C5 C7 122.159 H3 C1 H4 116.127
C5 C6 H8 111.506 C5 C6 H10 110.072
C5 C6 H11 110.072 C5 C7 H9 111.506
C5 C7 H12 110.072 C5 C7 H13 110.072
C6 C5 C7 115.683 H8 C6 H10 108.855
H8 C6 H11 108.855 H9 C7 H12 108.855
H9 C7 H13 108.855 H10 C6 H11 107.376
H12 C7 H13 107.376
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.561      
2 C 0.223      
3 H 0.224      
4 H 0.224      
5 C -0.162      
6 C -0.655      
7 C -0.655      
8 H 0.231      
9 H 0.231      
10 H 0.225      
11 H 0.225      
12 H 0.225      
13 H 0.225      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -0.610 0.610
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.811 0.000 0.000
y 0.000 -31.759 0.000
z 0.000 0.000 -28.366
Traceless
 xyz
x -1.749 0.000 0.000
y 0.000 -1.670 0.000
z 0.000 0.000 3.418
Polar
3z2-r26.837
x2-y2-0.052
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.167 0.000 0.000
y 0.000 5.667 0.000
z 0.000 0.000 12.425


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000