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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: mPW1PW91/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/aug-cc-pVDZ
 hartrees
Energy at 0K-157.192928
Energy at 298.15K-157.201523
HF Energy-157.192928
Nuclear repulsion energy124.194156
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/aug-cc-pVDZ
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' 3254 3118 25.28      
2 A' 3172 3040 19.38      
3 A' 3158 3026 12.94      
4 A' 3126 2996 19.53      
5 A' 3046 2919 37.02      
6 A' 1516 1453 2.23      
7 A' 1481 1419 8.84      
8 A' 1423 1364 3.30      
9 A' 1380 1323 1.98      
10 A' 1242 1190 0.03      
11 A' 1212 1161 0.04      
12 A' 1051 1007 2.32      
13 A' 1008 966 14.05      
14 A' 938 899 2.47      
15 A' 804 771 7.37      
16 A' 773 741 0.97      
17 A' 366 351 0.18      
18 A" 3239 3104 0.27      
19 A" 3152 3020 25.49      
20 A" 3123 2992 29.06      
21 A" 1469 1408 1.52      
22 A" 1456 1396 4.28      
23 A" 1186 1137 0.63      
24 A" 1130 1083 0.05      
25 A" 1101 1055 4.39      
26 A" 1054 1010 1.07      
27 A" 888 851 8.90      
28 A" 811 778 4.22      
29 A" 344 330 0.61      
30 A" 224 215 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24063.4 cm-1
Scaled (by 0.9583) Zero Point Vibrational Energy (zpe) 23059.9 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 mPW1PW91/aug-cc-pVDZ
ABC
0.52129 0.21174 0.18598

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.345 0.402 0.000
C2 -0.878 1.282 0.000
H3 1.293 0.942 0.000
C4 0.345 -0.899 0.754
C5 0.345 -0.899 -0.754
H6 1.255 -1.204 1.267
H7 1.255 -1.204 -1.267
H8 -0.574 -1.189 1.261
H9 -0.574 -1.189 -1.261
H10 -1.794 0.676 0.000
H11 -0.905 1.928 0.888
H12 -0.905 1.928 -0.888

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.50621.09091.50441.50442.23952.23952.22872.22872.15642.16272.1627
C21.50622.19732.61182.61183.51213.51212.79012.79011.09821.09861.0986
H31.09092.19732.20432.20432.49302.49303.10143.10143.09842.56722.5672
C41.50442.61182.20431.50831.08822.23751.08912.23402.76153.09383.5002
C51.50442.61182.20431.50832.23751.08822.23401.08912.76153.50023.0938
H62.23953.51212.49301.08822.23752.53421.82953.12083.79963.82334.3726
H72.23953.51212.49302.23751.08822.53423.12081.82953.79964.37263.8233
H82.22872.79013.10141.08912.23401.82953.12082.52242.56023.15573.7999
H92.22872.79013.10142.23401.08913.12081.82952.52242.56023.79993.1557
H102.15641.09823.09842.76152.76153.79963.79962.56022.56021.77361.7736
H112.16271.09862.56723.09383.50023.82334.37263.15573.79991.77361.7765
H122.16271.09862.56723.50023.09384.37263.82333.79993.15571.77361.7765

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.813 C1 C2 H11 111.294
C1 C2 H12 111.294 C1 C4 H5 59.915
C1 C4 H6 118.609 C1 C4 H8 117.589
C1 H5 C4 59.915 C1 H5 H7 118.609
C1 H5 H9 117.589 C2 C1 C3 114.622
C2 C1 C4 120.339 C2 C1 H5 120.339
C3 C1 C4 115.355 C3 C1 H5 115.355
C4 C1 H5 60.170 C4 H5 H7 118.126
C4 H5 H9 117.747 H5 C4 H6 118.126
H5 C4 H8 117.747 H6 C4 H8 114.334
H7 H5 H9 114.334 H10 C2 H11 107.681
H10 C2 H12 107.681 H11 C2 H12 107.911
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.621      
2 C 0.228      
3 H -0.478      
4 C 0.924      
5 C 0.924      
6 H -0.474      
7 H -0.474      
8 H -0.468      
9 H -0.468      
10 H -0.209      
11 H -0.063      
12 H -0.063      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.041 0.133 0.000 0.139
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.421 0.255 0.000
y 0.255 -27.443 0.000
z 0.000 0.000 -27.191
Traceless
 xyz
x 1.896 0.255 0.000
y 0.255 -1.137 0.000
z 0.000 0.000 -0.759
Polar
3z2-r2-1.517
x2-y22.022
xy0.255
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.852 -0.539 0.000
y -0.539 7.762 0.000
z 0.000 0.000 7.173


<r2> (average value of r2) Å2
<r2> 83.604
(<r2>)1/2 9.143