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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: CCD/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCD/6-311G**
 hartrees
Energy at 0K-156.778744
Energy at 298.15K-156.787407
HF Energy-156.134013
Nuclear repulsion energy123.974984
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 CCD/6-311G**
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' 3258 3112 27.56      
2 A' 3179 3037 16.74      
3 A' 3165 3023 12.18      
4 A' 3127 2987 22.50      
5 A' 3051 2914 30.85      
6 A' 1552 1482 1.15      
7 A' 1527 1458 7.57      
8 A' 1461 1395 3.04      
9 A' 1420 1356 1.82      
10 A' 1259 1202 0.11      
11 A' 1235 1179 0.11      
12 A' 1097 1048 6.91      
13 A' 1024 978 8.97      
14 A' 961 918 2.04      
15 A' 815 779 4.14      
16 A' 790 755 3.25      
17 A' 367 351 0.22      
18 A" 3244 3099 0.20      
19 A" 3159 3017 20.13      
20 A" 3126 2985 31.10      
21 A" 1519 1451 1.75      
22 A" 1495 1428 2.21      
23 A" 1225 1170 0.61      
24 A" 1177 1124 0.04      
25 A" 1133 1082 3.50      
26 A" 1105 1056 1.09      
27 A" 901 860 8.94      
28 A" 845 807 4.25      
29 A" 347 331 0.50      
30 A" 226 216 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24394.3 cm-1
Scaled (by 0.9551) Zero Point Vibrational Energy (zpe) 23299.0 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 CCD/6-311G**
ABC
0.51804 0.21097 0.18532

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.349 0.406 0.000
C2 -0.888 1.280 0.000
H3 1.293 0.948 0.000
C4 0.349 -0.899 0.758
C5 0.349 -0.899 -0.758
H6 1.259 -1.203 1.267
H7 1.259 -1.203 -1.267
H8 -0.570 -1.186 1.260
H9 -0.570 -1.186 -1.260
H10 -1.792 0.659 0.000
H11 -0.919 1.922 0.888
H12 -0.919 1.922 -0.888

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.51481.08801.50961.50962.24072.24072.22912.22912.15642.16672.1667
C21.51482.20582.61832.61833.51813.51812.78762.78761.09661.09651.0965
H31.08802.20582.20872.20872.49672.49673.10063.10063.09832.57422.5742
C41.50962.61832.20871.51511.08532.23981.08642.23592.75503.09613.5040
C51.50962.61832.20871.51512.23981.08532.23591.08642.75503.50403.0961
H62.24073.51812.49671.08532.23982.53361.82873.11943.79203.82734.3760
H72.24073.51812.49672.23981.08532.53363.11941.82873.79204.37603.8273
H82.22912.78763.10061.08642.23591.82873.11942.52052.54703.14963.7945
H92.22912.78763.10062.23591.08643.11941.82872.52052.54703.79453.1496
H102.15641.09663.09832.75502.75503.79203.79202.54702.54701.77391.7739
H112.16671.09652.57423.09613.50403.82734.37603.14963.79451.77391.7767
H122.16671.09652.57423.50403.09614.37603.82733.79453.14961.77391.7767

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.307 C1 C2 H11 111.129
C1 C2 H12 111.129 C1 C4 H5 59.880
C1 C4 H6 118.501 C1 C4 H8 117.408
C1 H5 C4 59.880 C1 H5 H7 118.501
C1 H5 H9 117.408 C2 C1 C3 114.887
C2 C1 C4 119.928 C2 C1 H5 119.928
C3 C1 C4 115.533 C3 C1 H5 115.533
C4 C1 H5 60.240 C4 H5 H7 117.983
C4 H5 H9 117.565 H5 C4 H6 117.983
H5 C4 H8 117.565 H6 C4 H8 114.719
H7 H5 H9 114.719 H10 C2 H11 107.968
H10 C2 H12 107.968 H11 C2 H12 108.219
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability