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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: MP3/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP3/TZVP
 hartrees
Energy at 0K-156.784051
Energy at 298.15K-156.792740
HF Energy-156.145809
Nuclear repulsion energy124.485123
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 MP3/TZVP
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' 3289 3076 26.34      
2 A' 3213 3005 16.81      
3 A' 3196 2989 10.41      
4 A' 3151 2947 24.29      
5 A' 3077 2878 31.31      
6 A' 1557 1456 1.21      
7 A' 1536 1436 7.42      
8 A' 1464 1369 3.09      
9 A' 1427 1335 2.18      
10 A' 1264 1182 0.06      
11 A' 1241 1161 0.10      
12 A' 1111 1039 8.61      
13 A' 1025 958 7.59      
14 A' 969 907 2.35      
15 A' 822 769 2.46      
16 A' 793 742 5.82      
17 A' 375 351 0.27      
18 A" 3275 3063 0.28      
19 A" 3190 2983 20.81      
20 A" 3152 2948 31.13      
21 A" 1524 1425 1.47      
22 A" 1507 1410 2.03      
23 A" 1236 1156 0.69      
24 A" 1191 1114 0.01      
25 A" 1143 1069 3.58      
26 A" 1121 1048 0.80      
27 A" 897 838 10.11      
28 A" 859 803 5.21      
29 A" 355 332 0.52      
30 A" 221 207 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24589.9 cm-1
Scaled (by 0.9352) Zero Point Vibrational Energy (zpe) 22996.4 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 MP3/TZVP
ABC
0.52212 0.21269 0.18687

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.349 0.405 0.000
C2 -0.886 1.274 0.000
H3 1.287 0.945 0.000
C4 0.349 -0.895 0.755
C5 0.349 -0.895 -0.755
H6 1.254 -1.199 1.260
H7 1.254 -1.199 -1.260
H8 -0.567 -1.181 1.253
H9 -0.567 -1.181 -1.253
H10 -1.785 0.654 0.000
H11 -0.918 1.913 0.884
H12 -0.918 1.913 -0.884

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.50961.08231.50371.50372.23142.23142.21962.21962.14832.15842.1584
C21.50962.19772.60742.60743.50433.50432.77472.77471.09181.09141.0914
H31.08232.19772.19922.19922.48672.48673.08703.08703.08572.56522.5652
C41.50372.60742.19921.50991.08002.22951.08122.22562.74293.08303.4893
C51.50372.60742.19921.50992.22951.08002.22561.08122.74293.48933.0830
H62.23143.50432.48671.08002.22952.51941.82123.10353.77573.81304.3583
H72.23143.50432.48672.22951.08002.51943.10351.82123.77574.35833.8130
H82.21962.77473.08701.08122.22561.82123.10352.50642.53433.13543.7768
H92.21962.77473.08702.22561.08123.10351.82122.50642.53433.77683.1354
H102.14831.09183.08572.74292.74293.77573.77572.53432.53431.76551.7655
H112.15841.09142.56523.08303.48933.81304.35833.13543.77681.76551.7687
H122.15841.09142.56523.48933.08304.35833.81303.77683.13541.76551.7687

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.312 C1 C2 H11 111.141
C1 C2 H12 111.141 C1 C4 H5 59.863
C1 C4 H6 118.539 C1 C4 H8 117.402
C1 H5 C4 59.863 C1 H5 H7 118.539
C1 H5 H9 117.402 C2 C1 C3 114.970
C2 C1 C4 119.833 C2 C1 H5 119.833
C3 C1 C4 115.549 C3 C1 H5 115.549
C4 C1 H5 60.273 C4 H5 H7 117.864
C4 H5 H9 117.440 H5 C4 H6 117.864
H5 C4 H8 117.440 H6 C4 H8 114.852
H7 H5 H9 114.852 H10 C2 H11 107.938
H10 C2 H12 107.938 H11 C2 H12 108.249
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability