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All results from a given calculation for C5H10 (2-Butene, 2-methyl-)

using model chemistry: B3PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/3-21G*
 hartrees
Energy at 0K-195.405486
Energy at 298.15K-195.415347
Nuclear repulsion energy173.999555
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 B3PW91/3-21G*
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 3159 3031 42.60      
2 A 3150 3022 17.36      
3 A 3135 3008 5.28      
4 A 3130 3003 12.88      
5 A 3042 2918 8.28      
6 A 3039 2916 53.50      
7 A 3033 2910 19.59      
8 A 1759 1688 0.73      
9 A 1558 1495 16.36      
10 A 1552 1489 3.32      
11 A 1539 1477 2.76      
12 A 1465 1405 4.98      
13 A 1455 1396 8.83      
14 A 1441 1383 9.03      
15 A 1414 1357 3.11      
16 A 1244 1194 5.76      
17 A 1148 1101 12.48      
18 A 1091 1047 9.13      
19 A 987 947 1.48      
20 A 972 933 3.44      
21 A 771 740 2.25      
22 A 533 512 2.67      
23 A 382 367 0.62      
24 A 306 294 0.22      
25 A 3089 2963 43.01      
26 A 3085 2960 12.52      
27 A 3084 2959 6.68      
28 A 1555 1492 27.40      
29 A 1549 1486 2.02      
30 A 1534 1471 1.27      
31 A 1137 1091 3.91      
32 A 1096 1052 0.02      
33 A 1049 1007 2.70      
34 A 845 811 19.35      
35 A 445 427 4.63      
36 A 262 251 2.36      
37 A 187 180 1.67      
38 A 155 149 0.08      
39 A 117 112 1.08      

Unscaled Zero Point Vibrational Energy (zpe) 30246.9 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 29018.9 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 B3PW91/3-21G*
ABC
0.26784 0.11680 0.08522

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.512 0.471 0.000
H2 -1.952 -0.529 0.000
H3 -1.880 1.010 0.885
H4 -1.880 1.010 -0.885
C5 0.287 -2.093 0.000
H6 0.669 -2.623 -0.884
H7 0.669 -2.623 0.884
H8 -0.803 -2.178 0.000
C9 0.753 -0.661 0.000
H10 1.837 -0.535 0.000
C11 0.000 0.447 0.000
C12 0.634 1.822 0.000
H13 1.728 1.759 0.000
H14 0.319 2.392 0.885
H15 0.319 2.392 -0.885

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 H6 H7 H8 C9 H10 C11 C12 H13 H14 H15
C11.09281.09941.09943.13233.88733.88732.74272.53223.49671.51212.53603.48632.79732.7973
H21.09281.77651.77652.73103.46913.46912.00982.70823.78872.18213.49524.33313.80443.8044
H31.09941.77651.77003.88654.77724.43753.47933.24144.12112.15282.78653.78962.59713.1432
H41.09941.77651.77003.88654.43754.77723.47933.24144.12112.15282.78653.78963.14322.5971
C53.13232.73103.88653.88651.09931.09931.09351.50632.19782.55583.93064.11284.57204.5720
H63.88733.46914.77724.43751.09931.76831.77402.15372.55043.26344.53214.59375.32965.0272
H73.88733.46914.43754.77721.09931.76831.77402.15372.55043.26344.53214.59375.02725.3296
H82.74272.00983.47933.47931.09351.77401.77402.17383.10982.74504.25094.68074.78884.7888
C92.53222.70823.24143.24141.50632.15372.15372.17381.09101.33922.48572.60873.20843.2084
H103.49673.78874.12114.12112.19782.55042.55043.10981.09102.08262.64612.29653.41433.4143
C111.51212.18212.15282.15282.55583.26343.26342.74501.33922.08261.51482.16982.16132.1613
C122.53603.49522.78652.78653.93064.53214.53214.25092.48572.64611.51481.09541.09941.0994
H133.48634.33313.78963.78964.11284.59374.59374.68072.60872.29652.16981.09541.78071.7807
H142.79733.80442.59713.14324.57205.32965.02724.78883.20843.41432.16131.09941.78071.7708
H152.79733.80443.14322.59714.57205.02725.32964.78883.20843.41432.16131.09941.78071.7708

picture of 2-Butene, 2-methyl- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C11 C9 125.158 C1 C11 C12 113.820
H2 C1 H3 108.272 H2 C1 H4 108.272
H2 C1 C11 112.806 H3 C1 H4 107.225
H3 C1 C11 110.043 H4 C1 C11 110.043
C5 C9 H10 114.655 C5 C9 C11 127.745
H6 C5 H7 107.091 H6 C5 H8 108.004
H6 C5 C9 110.520 H7 C5 H8 108.004
H7 C5 C9 110.520 H8 C5 C9 112.503
C9 C11 C12 121.022 H10 C9 C11 117.601
C11 C12 H13 111.453 C11 C12 H14 110.528
C11 C12 H15 110.528 H13 C12 H14 108.457
H13 C12 H15 108.457 H14 C12 H15 107.288
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.658      
2 H 0.219      
3 H 0.219      
4 H 0.219      
5 C -0.673      
6 H 0.221      
7 H 0.221      
8 H 0.218      
9 C -0.193      
10 H 0.195      
11 C 0.007      
12 C -0.641      
13 H 0.214      
14 H 0.216      
15 H 0.216      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.190 0.076 0.000 0.205
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.690 -0.332 0.000
y -0.332 -31.247 0.000
z 0.000 0.000 -34.453
Traceless
 xyz
x 1.160 -0.332 0.000
y -0.332 1.825 0.000
z 0.000 0.000 -2.984
Polar
3z2-r2-5.969
x2-y2-0.444
xy-0.332
xz0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 150.984
(<r2>)1/2 12.288