return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C4H6 (1-Methylcyclopropene)

using model chemistry: MP2/LANL2DZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP2/LANL2DZ
 hartrees
Energy at 0K-155.152212
Energy at 298.15K 
HF Energy-154.801681
Nuclear repulsion energy105.511145
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 MP2/LANL2DZ
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' 3312 3190 0.59 97.30 0.28 0.43
2 A' 3127 3012 26.12 64.25 0.74 0.85
3 A' 3087 2973 59.80 117.25 0.14 0.25
4 A' 3016 2905 33.66 166.63 0.00 0.00
5 A' 1768 1703 9.86 13.28 0.10 0.18
6 A' 1548 1491 3.07 8.95 0.56 0.72
7 A' 1534 1477 11.30 16.31 0.70 0.82
8 A' 1459 1406 1.85 4.31 0.75 0.86
9 A' 1187 1143 10.90 3.06 0.21 0.35
10 A' 1109 1068 23.33 2.24 0.15 0.26
11 A' 1074 1034 36.45 4.41 0.28 0.44
12 A' 960 925 1.65 9.76 0.62 0.76
13 A' 936 901 9.74 17.85 0.18 0.31
14 A' 623 600 0.38 17.31 0.65 0.79
15 A' 331 319 2.13 1.74 0.73 0.85
16 A" 3183 3065 51.77 59.73 0.75 0.86
17 A" 3110 2996 25.23 60.10 0.75 0.86
18 A" 1522 1466 10.79 13.36 0.75 0.86
19 A" 1133 1091 0.09 0.58 0.75 0.86
20 A" 1066 1027 0.77 3.12 0.75 0.86
21 A" 988 951 2.58 13.36 0.75 0.86
22 A" 697 671 47.54 1.74 0.75 0.86
23 A" 285 275 19.74 1.56 0.75 0.86
24 A" 131 126 0.40 0.47 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 18592.6 cm-1
Scaled (by 0.9631) Zero Point Vibrational Energy (zpe) 17906.6 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 MP2/LANL2DZ
ABC
0.64975 0.20190 0.16402

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/LANL2DZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.188 0.000
C2 -0.092 -1.375 0.000
C3 1.178 -0.446 0.000
C4 -0.821 1.451 0.000
H5 -0.371 -1.898 0.925
H6 -0.371 -1.898 -0.925
H7 2.261 -0.419 0.000
H8 -0.170 2.342 0.000
H9 -1.472 1.485 -0.892
H10 -1.472 1.485 0.892

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.56621.33821.50582.31182.31182.34072.16072.15492.1549
C21.56621.57402.91851.09851.09852.53963.71843.29853.2985
C31.33821.57402.75572.31592.31591.08263.09713.39823.3982
C41.50582.91852.75573.50293.50293.60411.10391.10531.1053
H52.31181.09852.31593.50291.85043.15724.34443.99463.5572
H62.31181.09852.31593.50291.85043.15724.34443.55723.9946
H72.34072.53961.08263.60413.15723.15723.67844.28384.2838
H82.16073.71843.09711.10394.34444.34443.67841.79651.7965
H92.15493.29853.39821.10533.99463.55724.28381.79651.7850
H102.15493.29853.39821.10533.55723.99464.28381.79651.7850

picture of 1-Methylcyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 C2 C3 50.448 H1 C2 C6 119.316
C2 C3 C6 24.495 C2 C3 C10 72.903
C2 C6 C3 36.448 C2 C6 H4 49.877
C2 C6 H5 32.621 C3 C2 C6 119.057
C3 C6 H4 51.772 C3 C6 H5 66.453
C3 C10 H7 9.361 C3 C10 H8 64.881
C3 C10 H9 74.773 H4 C6 H5 74.685
C6 C3 C10 86.523 H7 C10 H8 58.475
H7 C10 H9 77.975 H8 C10 H9 60.211
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability