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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: MP4/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP4/6-31G*
 hartrees
Energy at 0K-156.679444
Energy at 298.15K-156.688062
HF Energy-156.094713
Nuclear repulsion energy123.869275
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 MP4/6-31G*
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' 3245 3098        
2 A' 3162 3019        
3 A' 3156 3013        
4 A' 3122 2981        
5 A' 3046 2908        
6 A' 1558 1488        
7 A' 1545 1476        
8 A' 1468 1402        
9 A' 1431 1366        
10 A' 1261 1204        
11 A' 1238 1182        
12 A' 1096 1046        
13 A' 1024 978        
14 A' 961 918        
15 A' 814 777        
16 A' 788 753        
17 A' 369 352        
18 A" 3232 3086        
19 A" 3151 3008        
20 A" 3126 2985        
21 A" 1538 1469        
22 A" 1509 1441        
23 A" 1225 1169        
24 A" 1180 1127        
25 A" 1136 1085        
26 A" 1096 1047        
27 A" 896 855        
28 A" 842 804        
29 A" 345 329        
30 A" 224 214        

Unscaled Zero Point Vibrational Energy (zpe) 24391.4 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 23288.9 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 MP4/6-31G*
ABC
0.51778 0.21064 0.18500

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.348 0.406 0.000
C2 -0.885 1.283 0.000
H3 1.295 0.950 0.000
C4 0.348 -0.901 0.756
C5 0.348 -0.901 -0.756
H6 1.257 -1.206 1.273
H7 1.257 -1.206 -1.273
H8 -0.571 -1.189 1.266
H9 -0.571 -1.189 -1.266
H10 -1.793 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
C11.51351.09191.50971.50972.24592.24592.23412.23412.15732.16922.1692
C21.51352.20552.61962.61963.52203.52202.79502.79501.09921.09881.0988
H31.09192.20552.21202.21202.50382.50383.10803.10803.10182.57652.5765
C41.50972.61962.21201.51291.08892.24431.08982.23992.75833.10043.5079
C51.50972.61962.21201.51292.24431.08892.23991.08982.75833.50793.1004
H62.24593.52202.50381.08892.24432.54571.82823.12833.79783.83224.3837
H72.24593.52202.50382.24431.08892.54573.12831.82823.79784.38373.8322
H82.23412.79503.10801.08982.23991.82823.12832.53122.55553.15733.8045
H92.23412.79503.10802.23991.08983.12831.82822.53122.55553.80453.1573
H102.15731.09923.10182.75832.75833.79783.79782.55552.55551.77621.7762
H112.16921.09882.57653.10043.50793.83224.38373.15733.80451.77621.7799
H122.16921.09882.57653.50793.10044.38373.83223.80453.15731.77621.7799

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.313 C1 C2 H11 111.282
C1 C2 H12 111.282 C1 C4 H5 59.931
C1 C4 H6 118.702 C1 C4 H8 117.587
C1 H5 C4 59.931 C1 H5 H7 118.702
C1 H5 H9 117.587 C2 C1 C3 114.701
C2 C1 C4 120.104 C2 C1 H5 120.104
C3 C1 C4 115.539 C3 C1 H5 115.539
C4 C1 H5 60.137 C4 H5 H7 118.312
C4 H5 H9 117.852 H5 C4 H6 118.312
H5 C4 H8 117.852 H6 C4 H8 114.097
H7 H5 H9 114.097 H10 C2 H11 107.820
H10 C2 H12 107.820 H11 C2 H12 108.185
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability