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return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for (1,2-Butadiene, 3-methyl-)

using model chemistry: mPW1PW91/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/STO-3G
 hartrees
Energy at 0K-192.889732
Energy at 298.15K-192.896517
Nuclear repulsion energy156.011018
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 mPW1PW91/STO-3G
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 3539 3111 0.10      
2 A1 3404 2991 20.64      
3 A1 3345 2940 2.10      
4 A1 2258 1984 0.03      
5 A1 1698 1493 1.24      
6 A1 1633 1435 1.94      
7 A1 1580 1388 5.35      
8 A1 1445 1270 13.45      
9 A1 1108 973 12.18      
10 A1 791 695 0.00      
11 A1 346 304 0.21      
12 A2 3500 3076 0.00      
13 A2 1676 1473 0.00      
14 A2 1099 966 0.00      
15 A2 667 587 0.00      
16 A2 141 124 0.00      
17 B1 3537 3109 0.91      
18 B1 3500 3076 0.98      
19 B1 1682 1478 10.32      
20 B1 1197 1052 4.06      
21 B1 1112 977 0.04      
22 B1 466 409 1.01      
23 B1 267 235 2.49      
24 B1 155 136 0.30      
25 B2 3537 3109 0.07      
26 B2 3344 2939 0.49      
27 B2 1685 1481 2.69      
28 B2 1566 1376 0.38      
29 B2 1331 1170 4.51      
30 B2 1063 935 1.21      
31 B2 954 839 30.82      
32 B2 628 552 1.89      
33 B2 186 163 0.10      

Unscaled Zero Point Vibrational Energy (zpe) 27219.3 cm-1
Scaled (by 0.8789) Zero Point Vibrational Energy (zpe) 23923.0 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 mPW1PW91/STO-3G
ABC
0.27006 0.11898 0.08677

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/STO-3G

Point Group is C2v

Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.200      
2 C -0.012      
3 H 0.090      
4 H 0.090      
5 C -0.020      
6 C -0.231      
7 C -0.231      
8 H 0.088      
9 H 0.088      
10 H 0.085      
11 H 0.085      
12 H 0.085      
13 H 0.085      


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 -0.524 0.524
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -0.609 0.000 0.000
y 0.000 -0.703 0.000
z 0.000 0.000 1.312
Traceless
 xyz
x -0.913 0.000 0.000
y 0.000 -1.055 0.000
z 0.000 0.000 1.967
Polar
3z2-r23.935
x2-y20.095
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.670 0.000 0.000
y 0.000 2.972 0.000
z 0.000 0.000 8.189


<r2> (average value of r2) Å2
<r2> 143.206
(<r2>)1/2 11.967