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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: HF/TZVP

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/TZVP
 hartrees
Energy at 0K-156.146145
Energy at 298.15K-156.154987
HF Energy-156.146145
Nuclear repulsion energy124.894359
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/TZVP
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' 3353 3046 42.09      
2 A' 3281 2981 20.01      
3 A' 3268 2970 21.43      
4 A' 3217 2923 31.50      
5 A' 3157 2869 43.40      
6 A' 1645 1494 1.38      
7 A' 1619 1471 7.50      
8 A' 1553 1411 2.51      
9 A' 1508 1370 2.41      
10 A' 1325 1204 0.03      
11 A' 1292 1174 0.02      
12 A' 1167 1060 4.50      
13 A' 1059 962 9.20      
14 A' 1014 921 5.30      
15 A' 853 775 3.04      
16 A' 819 744 7.69      
17 A' 391 355 0.22      
18 A" 3337 3032 0.28      
19 A" 3261 2963 33.63      
20 A" 3212 2918 47.98      
21 A" 1611 1463 1.67      
22 A" 1590 1445 2.14      
23 A" 1302 1183 0.40      
24 A" 1257 1142 0.36      
25 A" 1204 1094 4.33      
26 A" 1192 1083 0.29      
27 A" 933 848 12.70      
28 A" 890 808 7.72      
29 A" 369 336 0.57      
30 A" 237 215 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 25456.2 cm-1
Scaled (by 0.9086) Zero Point Vibrational Energy (zpe) 23129.5 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 HF/TZVP
ABC
0.52852 0.21300 0.18713

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.345 0.397 0.000
C2 -0.879 1.280 0.000
H3 1.279 0.933 0.000
C4 0.345 -0.896 0.751
C5 0.345 -0.896 -0.751
H6 1.244 -1.197 1.257
H7 1.244 -1.197 -1.257
H8 -0.561 -1.186 1.252
H9 -0.561 -1.186 -1.252
H10 -1.787 0.686 0.000
H11 -0.900 1.918 0.878
H12 -0.900 1.918 -0.878

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.50961.07681.49571.49572.22052.22052.21252.21252.15132.15322.1532
C21.50962.18622.60792.60793.49683.49682.78402.78401.08511.08561.0856
H31.07682.18622.18702.18702.47372.47373.07333.07333.07602.54812.5481
C41.49572.60792.18701.50121.07472.22001.07552.21692.75883.08073.4824
C51.49572.60792.18701.50122.22001.07472.21691.07552.75883.48243.0807
H62.22053.49682.47371.07472.22002.51371.80563.09083.78303.80134.3433
H72.22053.49682.47372.22001.07472.51373.09081.80563.78304.34333.8013
H82.21252.78403.07331.07552.21691.80563.09082.50342.56333.14503.7799
H92.21252.78403.07332.21691.07553.09081.80562.50342.56333.77993.1450
H102.15131.08513.07602.75882.75883.78303.78302.56332.56331.75401.7540
H112.15321.08562.54813.08073.48243.80134.34333.14503.77991.75401.7562
H122.15321.08562.54813.48243.08074.34333.80133.77993.14501.75401.7562

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.954 C1 C2 H11 111.078
C1 C2 H12 111.078 C1 C4 H5 59.879
C1 C4 H6 118.587 C1 C4 H8 117.818
C1 H5 C4 59.879 C1 H5 H7 118.587
C1 H5 H9 117.818 C2 C1 C3 114.361
C2 C1 C4 120.397 C2 C1 H5 120.397
C3 C1 C4 115.491 C3 C1 H5 115.491
C4 C1 H5 60.242 C4 H5 H7 118.104
C4 H5 H9 117.771 H5 C4 H6 118.104
H5 C4 H8 117.771 H6 C4 H8 114.220
H7 H5 H9 114.220 H10 C2 H11 107.806
H10 C2 H12 107.806 H11 C2 H12 107.972
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.023      
2 C -0.265      
3 H 0.111      
4 C -0.264      
5 C -0.264      
6 H 0.109      
7 H 0.109      
8 H 0.101      
9 H 0.101      
10 H 0.071      
11 H 0.084      
12 H 0.084      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.035 0.139 0.000 0.144
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.583 0.255 0.000
y 0.255 -27.527 0.000
z 0.000 0.000 -27.260
Traceless
 xyz
x 1.810 0.255 0.000
y 0.255 -1.105 0.000
z 0.000 0.000 -0.705
Polar
3z2-r2-1.409
x2-y21.944
xy0.255
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.160 -0.393 0.000
y -0.393 6.861 0.000
z 0.000 0.000 6.449


<r2> (average value of r2) Å2
<r2> 83.095
(<r2>)1/2 9.116