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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: MP4/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP4/6-311G**
 hartrees
Energy at 0K-156.804321
Energy at 298.15K-156.812924
HF Energy-156.133563
Nuclear repulsion energy123.722529
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 MP4/6-311G**
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' 3239 3141        
2 A' 3157 3061        
3 A' 3143 3047        
4 A' 3107 3013        
5 A' 3029 2937        
6 A' 1528 1482        
7 A' 1513 1467        
8 A' 1440 1396        
9 A' 1401 1359        
10 A' 1241 1204        
11 A' 1221 1184        
12 A' 1076 1043        
13 A' 1010 979        
14 A' 949 920        
15 A' 803 779        
16 A' 778 754        
17 A' 361 350        
18 A" 3225 3127        
19 A" 3136 3041        
20 A" 3106 3012        
21 A" 1506 1461        
22 A" 1479 1434        
23 A" 1210 1173        
24 A" 1159 1124        
25 A" 1120 1086        
26 A" 1081 1049        
27 A" 881 855        
28 A" 833 808        
29 A" 341 330        
30 A" 222 215        

Unscaled Zero Point Vibrational Energy (zpe) 24146.0 cm-1
Scaled (by 0.9697) Zero Point Vibrational Energy (zpe) 23414.4 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 MP4/6-311G**
ABC
0.51507 0.21037 0.18471

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.350 0.409 0.000
C2 -0.890 1.281 0.000
H3 1.295 0.952 0.000
C4 0.350 -0.901 0.760
C5 0.350 -0.901 -0.760
H6 1.261 -1.204 1.270
H7 1.261 -1.204 -1.270
H8 -0.572 -1.186 1.262
H9 -0.572 -1.186 -1.262
H10 -1.792 0.654 0.000
H11 -0.923 1.923 0.890
H12 -0.923 1.923 -0.890

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.51601.08991.51441.51442.24612.24612.23352.23352.15672.16932.1693
C21.51602.20982.62212.62213.52373.52372.78922.78921.09841.09831.0983
H31.08992.20982.21452.21452.50272.50273.10683.10683.10192.57952.5795
C41.51442.62212.21451.52051.08712.24551.08822.24122.75463.10053.5099
C51.51442.62212.21451.52052.24551.08712.24121.08822.75463.50993.1005
H62.24613.52372.50271.08712.24552.53911.83353.12613.79383.83364.3837
H72.24613.52372.50272.24551.08712.53913.12611.83353.79384.38373.8336
H82.23352.78923.10681.08822.24121.83353.12612.52482.54373.15123.7980
H92.23352.78923.10682.24121.08823.12611.83352.52482.54373.79803.1512
H102.15671.09843.10192.75462.75463.79383.79382.54372.54371.77741.7774
H112.16931.09832.57953.10053.50993.83364.38373.15123.79801.77741.7801
H122.16931.09832.57953.50993.10054.38373.83363.79803.15121.77741.7801

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.138 C1 C2 H11 111.142
C1 C2 H12 111.142 C1 C4 H5 59.867
C1 C4 H6 118.476 C1 C4 H8 117.282
C1 H5 C4 59.867 C1 H5 H7 118.476
C1 H5 H9 117.282 C2 C1 C3 115.009
C2 C1 C4 119.823 C2 C1 H5 119.823
C3 C1 C4 115.530 C3 C1 H5 115.530
C4 C1 H5 60.266 C4 H5 H7 117.938
C4 H5 H9 117.482 H5 C4 H6 117.938
H5 C4 H8 117.482 H6 C4 H8 114.892
H7 H5 H9 114.892 H10 C2 H11 108.018
H10 C2 H12 108.018 H11 C2 H12 108.268
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability