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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: B2PLYP=FULL/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B2PLYP=FULL/aug-cc-pVDZ
 hartrees
Energy at 0K-157.040139
Energy at 298.15K-157.048723
HF Energy-156.842382
Nuclear repulsion energy123.788577
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 B2PLYP=FULL/aug-cc-pVDZ
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' 3252 3127 25.76      
2 A' 3170 3049 18.13      
3 A' 3155 3035 12.41      
4 A' 3116 2997 22.38      
5 A' 3041 2925 36.06      
6 A' 1513 1456 1.58      
7 A' 1491 1434 7.82      
8 A' 1423 1368 3.33      
9 A' 1386 1333 2.38      
10 A' 1233 1186 0.02      
11 A' 1212 1165 0.05      
12 A' 1038 998 5.96      
13 A' 1001 963 9.64      
14 A' 939 903 2.19      
15 A' 794 763 5.30      
16 A' 768 738 2.46      
17 A' 366 352 0.19      
18 A" 3237 3114 0.26      
19 A" 3150 3029 24.06      
20 A" 3114 2995 30.62      
21 A" 1479 1422 1.55      
22 A" 1464 1408 2.79      
23 A" 1189 1144 0.64      
24 A" 1132 1089 0.01      
25 A" 1104 1061 3.38      
26 A" 1054 1014 0.96      
27 A" 870 837 9.47      
28 A" 813 782 4.24      
29 A" 344 330 0.52      
30 A" 226 217 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24035.6 cm-1
Scaled (by 0.9618) Zero Point Vibrational Energy (zpe) 23117.4 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 B2PLYP=FULL/aug-cc-pVDZ
ABC
0.51621 0.21063 0.18491

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.349 0.407 0.000
C2 -0.886 1.281 0.000
H3 1.296 0.949 0.000
C4 0.349 -0.901 0.759
C5 0.349 -0.901 -0.759
H6 1.260 -1.207 1.270
H7 1.260 -1.207 -1.270
H8 -0.573 -1.188 1.265
H9 -0.573 -1.188 -1.265
H10 -1.796 0.665 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
C11.51241.09151.51211.51212.24672.24672.23442.23442.15992.16862.1686
C21.51242.20682.61922.61923.52233.52232.79182.79181.09941.09961.0996
H31.09152.20682.21242.21242.50222.50223.10783.10783.10502.57802.5780
C41.51212.61922.21241.51801.08872.24501.08972.24202.76153.10053.5092
C51.51212.61922.21241.51802.24501.08872.24201.08972.76153.50923.1005
H62.24673.52232.50221.08872.24502.53961.83303.12773.80183.83454.3843
H72.24673.52232.50222.24501.08872.53963.12771.83303.80184.38433.8345
H82.23442.79183.10781.08972.24201.83303.12772.52912.55493.15593.8026
H92.23442.79183.10782.24201.08973.12771.83302.52912.55493.80263.1559
H102.15991.09943.10502.76152.76153.80183.80182.55492.55491.77641.7764
H112.16861.09962.57803.10053.50923.83454.38433.15593.80261.77641.7794
H122.16861.09962.57803.50923.10054.38433.83453.80263.15591.77641.7794

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.586 C1 C2 H11 111.268
C1 C2 H12 111.268 C1 C4 H5 59.871
C1 C4 H6 118.603 C1 C4 H8 117.445
C1 H5 C4 59.871 C1 H5 H7 118.603
C1 H5 H9 117.445 C2 C1 C3 114.926
C2 C1 C4 119.994 C2 C1 H5 119.994
C3 C1 C4 115.427 C3 C1 H5 115.427
C4 C1 H5 60.258 C4 H5 H7 117.982
C4 H5 H9 117.643 H5 C4 H6 117.982
H5 C4 H8 117.643 H6 C4 H8 114.592
H7 H5 H9 114.592 H10 C2 H11 107.771
H10 C2 H12 107.771 H11 C2 H12 108.026
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability