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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: B3LYP/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/aug-cc-pVTZ
 hartrees
Energy at 0K-157.274176
Energy at 298.15K-157.282769
HF Energy-157.274176
Nuclear repulsion energy124.359203
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 B3LYP/aug-cc-pVTZ
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' 3207 3103 27.21      
2 A' 3130 3028 15.97      
3 A' 3123 3022 15.14      
4 A' 3074 2974 21.91      
5 A' 3016 2918 36.93      
6 A' 1513 1464 1.07      
7 A' 1501 1452 8.48      
8 A' 1425 1379 3.34      
9 A' 1398 1353 2.52      
10 A' 1233 1193 0.00      
11 A' 1210 1170 0.00      
12 A' 1049 1015 8.18      
13 A' 996 964 6.78      
14 A' 944 913 3.20      
15 A' 796 770 3.55      
16 A' 766 741 4.09      
17 A' 366 354 0.17      
18 A" 3192 3088 0.26      
19 A" 3119 3018 26.34      
20 A" 3069 2969 30.86      
21 A" 1492 1444 2.15      
22 A" 1473 1425 2.66      
23 A" 1199 1160 0.60      
24 A" 1145 1108 0.10      
25 A" 1110 1074 3.80      
26 A" 1073 1039 1.01      
27 A" 864 836 7.57      
28 A" 823 796 5.80      
29 A" 346 334 0.58      
30 A" 223 216 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 23936.5 cm-1
Scaled (by 0.9675) Zero Point Vibrational Energy (zpe) 23158.5 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 B3LYP/aug-cc-pVTZ
ABC
0.52352 0.21160 0.18578

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.345 0.401 0.000
C2 -0.878 1.285 0.000
H3 1.287 0.937 0.000
C4 0.345 -0.901 0.754
C5 0.345 -0.901 -0.754
H6 1.248 -1.204 1.265
H7 1.248 -1.204 -1.265
H8 -0.568 -1.189 1.258
H9 -0.568 -1.189 -1.258
H10 -1.791 0.687 0.000
H11 -0.904 1.928 0.882
H12 -0.904 1.928 -0.882

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.50881.08361.50421.50422.23432.23432.22322.22322.15562.16092.1609
C21.50882.19222.61522.61523.50923.50922.79202.79201.09181.09211.0921
H31.08362.19222.19842.19842.48762.48763.08893.08893.08822.56082.5608
C41.50422.61522.19841.50841.08102.23261.08192.22832.76643.09433.4981
C51.50422.61522.19841.50842.23261.08102.22831.08192.76643.49813.0943
H62.23433.50922.48761.08102.23262.53001.81603.10863.79673.81914.3647
H72.23433.50922.48762.23261.08102.53003.10861.81603.79674.36473.8191
H82.22322.79203.08891.08192.22831.81603.10862.51602.56843.15663.7954
H92.22322.79203.08892.22831.08193.10861.81602.51602.56843.79543.1566
H102.15561.09183.08822.76642.76643.79673.79672.56842.56841.76241.7624
H112.16091.09212.56083.09433.49813.81914.36473.15663.79541.76241.7650
H122.16091.09212.56083.49813.09434.36473.81913.79543.15661.76241.7650

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.946 C1 C2 H11 111.351
C1 C2 H12 111.351 C1 C4 H5 59.908
C1 C4 H6 118.690 C1 C4 H8 117.637
C1 H5 C4 59.908 C1 H5 H7 118.690
C1 H5 H9 117.637 C2 C1 C3 114.481
C2 C1 C4 120.448 C2 C1 H5 120.448
C3 C1 C4 115.357 C3 C1 H5 115.357
C4 C1 H5 60.183 C4 H5 H7 118.200
C4 H5 H9 117.756 H5 C4 H6 118.200
H5 C4 H8 117.756 H6 C4 H8 114.208
H7 H5 H9 114.208 H10 C2 H11 107.603
H10 C2 H12 107.603 H11 C2 H12 107.806
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.167      
2 C -0.559      
3 H 0.274      
4 C -0.669      
5 C -0.669      
6 H 0.229      
7 H 0.229      
8 H 0.224      
9 H 0.224      
10 H 0.249      
11 H 0.151      
12 H 0.151      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.044 0.133 0.000 0.140
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.775 0.255 0.000
y 0.255 -27.695 0.000
z 0.000 0.000 -27.440
Traceless
 xyz
x 1.793 0.255 0.000
y 0.255 -1.088 0.000
z 0.000 0.000 -0.704
Polar
3z2-r2-1.409
x2-y21.921
xy0.255
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.900 -0.544 0.000
y -0.544 7.817 0.000
z 0.000 0.000 7.216


<r2> (average value of r2) Å2
<r2> 83.725
(<r2>)1/2 9.150