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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: CCSD(T)/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCSD(T)/6-31G*
 hartrees
Energy at 0K-156.681155
Energy at 298.15K-156.689769
HF Energy-156.094654
Nuclear repulsion energy123.835031
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 CCSD(T)/6-31G*
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' 3235 3113        
2 A' 3156 3036        
3 A' 3150 3030        
4 A' 3112 2994        
5 A' 3040 2925        
6 A' 1558 1499        
7 A' 1543 1485        
8 A' 1468 1412        
9 A' 1430 1376        
10 A' 1259 1211        
11 A' 1236 1190        
12 A' 1097 1055        
13 A' 1023 984        
14 A' 960 924        
15 A' 813 782        
16 A' 787 758        
17 A' 369 355        
18 A" 3222 3100        
19 A" 3144 3025        
20 A" 3115 2997        
21 A" 1536 1478        
22 A" 1507 1450        
23 A" 1224 1177        
24 A" 1179 1135        
25 A" 1135 1092        
26 A" 1098 1056        
27 A" 895 861        
28 A" 842 810        
29 A" 345 332        
30 A" 222 214        

Unscaled Zero Point Vibrational Energy (zpe) 24350.0 cm-1
Scaled (by 0.9621) Zero Point Vibrational Energy (zpe) 23427.1 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 CCSD(T)/6-31G*
ABC
0.51751 0.21051 0.18490

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.349 0.406 0.000
C2 -0.886 1.283 0.000
H3 1.295 0.950 0.000
C4 0.349 -0.901 0.757
C5 0.349 -0.901 -0.757
H6 1.258 -1.206 1.273
H7 1.258 -1.206 -1.273
H8 -0.571 -1.190 1.266
H9 -0.571 -1.190 -1.266
H10 -1.794 0.664 0.000
H11 -0.917 1.927 0.890
H12 -0.917 1.927 -0.890

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.51431.09211.51001.51002.24622.24622.23472.23472.15862.16982.1698
C21.51432.20612.62042.62043.52303.52302.79592.79591.09951.09921.0992
H31.09212.20612.21272.21272.50452.50453.10893.10893.10292.57672.5767
C41.51002.62042.21271.51321.08932.24491.09022.24042.75963.10113.5087
C51.51002.62042.21271.51322.24491.08932.24041.09022.75963.50873.1011
H62.24623.52302.50451.08932.24492.54631.82883.12913.79943.83294.3847
H72.24623.52302.50452.24491.08932.54633.12911.82883.79944.38473.8329
H82.23472.79593.10891.09022.24041.82883.12912.53192.55683.15833.8057
H92.23472.79593.10892.24041.09023.12911.82882.53192.55683.80573.1583
H102.15861.09953.10292.75962.75963.79943.79942.55682.55681.77691.7769
H112.16981.09922.57673.10113.50873.83294.38473.15833.80571.77691.7807
H122.16981.09922.57673.50873.10114.38473.83293.80573.15831.77691.7807

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.339 C1 C2 H11 111.254
C1 C2 H12 111.254 C1 C4 H5 59.930
C1 C4 H6 118.687 C1 C4 H8 117.601
C1 H5 C4 59.930 C1 H5 H7 118.687
C1 H5 H9 117.601 C2 C1 C3 114.677
C2 C1 C4 120.099 C2 C1 H5 120.099
C3 C1 C4 115.563 C3 C1 H5 115.563
C4 C1 H5 60.139 C4 H5 H7 118.309
C4 H5 H9 117.855 H5 C4 H6 118.309
H5 C4 H8 117.855 H6 C4 H8 114.098
H7 H5 H9 114.098 H10 C2 H11 107.832
H10 C2 H12 107.832 H11 C2 H12 108.192
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability