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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: HF/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/Def2TZVPP
 hartrees
Energy at 0K-156.155722
Energy at 298.15K-156.164552
HF Energy-156.155722
Nuclear repulsion energy125.003547
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 HF/Def2TZVPP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3350 3037 42.26      
2 A' 3278 2971 16.98      
3 A' 3267 2962 24.59      
4 A' 3210 2910 31.46      
5 A' 3153 2858 42.81      
6 A' 1645 1491 1.44      
7 A' 1616 1465 7.05      
8 A' 1551 1406 2.55      
9 A' 1508 1367 2.70      
10 A' 1323 1200 0.02      
11 A' 1294 1173 0.01      
12 A' 1167 1057 4.39      
13 A' 1061 961 8.87      
14 A' 1012 917 4.32      
15 A' 849 769 3.53      
16 A' 818 741 5.99      
17 A' 388 352 0.15      
18 A" 3333 3021 0.28      
19 A" 3260 2955 34.62      
20 A" 3206 2906 45.47      
21 A" 1607 1457 1.54      
22 A" 1591 1442 2.07      
23 A" 1300 1179 0.37      
24 A" 1256 1139 0.36      
25 A" 1203 1090 4.22      
26 A" 1192 1081 0.18      
27 A" 934 847 11.77      
28 A" 886 803 6.94      
29 A" 367 333 0.50      
30 A" 238 216 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 25431.5 cm-1
Scaled (by 0.9064) Zero Point Vibrational Energy (zpe) 23051.1 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 HF/Def2TZVPP
ABC
0.52974 0.21328 0.18733

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.344 0.397 0.000
C2 -0.877 1.281 0.000
H3 1.277 0.931 0.000
C4 0.344 -0.896 0.750
C5 0.344 -0.896 -0.750
H6 1.242 -1.197 1.256
H7 1.242 -1.197 -1.256
H8 -0.560 -1.185 1.252
H9 -0.560 -1.185 -1.252
H10 -1.785 0.688 0.000
H11 -0.897 1.918 0.877
H12 -0.897 1.918 -0.877

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.50801.07541.49461.49462.21892.21892.21082.21082.14912.15112.1511
C21.50802.18252.60662.60663.49403.49402.78402.78401.08421.08451.0845
H31.07542.18252.18472.18472.47202.47203.06983.06983.07182.54422.5442
C41.49462.60662.18471.49971.07332.21821.07402.21542.75803.07903.4801
C51.49462.60662.18471.49972.21821.07332.21541.07402.75803.48013.0790
H62.21893.49402.47201.07332.21822.51281.80163.08813.78053.79804.3398
H72.21893.49402.47202.21821.07332.51283.08811.80163.78054.33983.7980
H82.21082.78403.06981.07402.21541.80163.08812.50352.56463.14433.7788
H92.21082.78403.06982.21541.07403.08811.80162.50352.56463.77883.1443
H102.14911.08423.07182.75802.75803.78053.78052.56462.56461.75221.7522
H112.15111.08452.54423.07903.48013.79804.33983.14433.77881.75221.7545
H122.15111.08452.54423.48013.07904.33983.79803.77883.14431.75221.7545

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.949 C1 C2 H11 111.093
C1 C2 H12 111.093 C1 C4 H5 59.886
C1 C4 H6 118.643 C1 C4 H8 117.861
C1 H5 C4 59.886 C1 H5 H7 118.643
C1 H5 H9 117.861 C2 C1 C3 114.266
C2 C1 C4 120.486 C2 C1 H5 120.486
C3 C1 C4 115.483 C3 C1 H5 115.483
C4 C1 H5 60.227 C4 H5 H7 118.164
C4 H5 H9 117.860 H5 C4 H6 118.164
H5 C4 H8 117.860 H6 C4 H8 114.067
H7 H5 H9 114.067 H10 C2 H11 107.790
H10 C2 H12 107.790 H11 C2 H12 107.979
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.063      
2 C -0.177      
3 H 0.033      
4 C -0.118      
5 C -0.118      
6 H 0.044      
7 H 0.044      
8 H 0.037      
9 H 0.037      
10 H 0.041      
11 H 0.057      
12 H 0.057      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.039 0.133 0.000 0.138
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.610 0.283 0.000
y 0.283 -27.551 0.000
z 0.000 0.000 -27.251
Traceless
 xyz
x 1.791 0.283 0.000
y 0.283 -1.121 0.000
z 0.000 0.000 -0.670
Polar
3z2-r2-1.341
x2-y21.941
xy0.283
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.274 -0.435 0.000
y -0.435 7.050 0.000
z 0.000 0.000 6.589


<r2> (average value of r2) Å2
<r2> 83.013
(<r2>)1/2 9.111