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 C5H6O (2-methylfuran)

using model chemistry: MP2/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 2 yes CS 1A'

Conformer 1 (C1)

Jump to S1C2
Vibrational Frequencies calculated at MP2/CEP-31G
Rotational Constants (cm-1) from geometry optimized at MP2/CEP-31G
See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at MP2/CEP-31G
 hartrees
Energy at 0K-46.970819
Energy at 298.15K 
HF Energy-46.463146
Nuclear repulsion energy112.572679
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/CEP-31G
Rotational Constants (cm-1) from geometry optimized at MP2/CEP-31G
See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 1.083 -0.263 0.000
C2 0.000 0.684 0.000
C3 0.499 -1.568 0.000
C4 -1.228 -0.019 0.000
C5 -0.909 -1.463 0.000
C6 0.390 2.158 0.000
H7 1.211 -2.395 0.000
H8 -2.221 0.438 0.000
H9 -1.616 -2.297 0.000
H10 -0.530 2.777 0.000
H11 0.989 2.413 0.899
H12 0.989 2.413 -0.899

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12
O11.43781.43032.32382.32522.51792.13593.37723.37923.44112.82392.8239
C21.43782.30681.41492.33081.52553.30772.23463.39012.15982.18572.1857
C31.43032.30682.32101.41223.72841.09023.38042.23694.46614.11084.1108
C42.32381.41492.32101.47902.71283.40501.09282.31082.88213.41153.4115
C52.32522.33081.41221.47903.84702.31542.30981.09324.25714.40804.4080
C62.51791.52553.72842.71283.84704.62623.12714.88581.10891.11011.1101
H72.13593.30771.09023.40502.31544.62624.44992.82815.45714.89574.8957
H83.37722.23463.38041.09282.30983.12714.44992.80102.88683.87493.8749
H93.37923.39012.23692.31081.09324.88582.82812.80105.18915.45655.4565
H103.44112.15984.46612.88214.25711.10895.45712.88685.18911.80261.8026
H112.82392.18574.11083.41154.40801.11014.89573.87495.45651.80261.7986
H122.82392.18574.11083.41154.40801.11014.89573.87495.45651.80261.7986

picture of 2-methylfuran state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 109.094 O1 C2 C6 116.325
O1 C3 C5 109.772 O1 C3 H7 115.207
C2 O1 C3 107.085 C2 C4 C5 107.280
C2 C4 H8 125.538 C2 C6 H10 109.117
C2 C6 H11 111.075 C2 C6 H12 111.075
C3 C5 C6 74.557 C3 C5 H9 125.988
C4 C2 C6 134.581 C4 C5 H9 127.243
C5 C3 H7 135.022 C5 C4 H8 127.182
H10 C6 H11 108.647 H10 C6 H12 108.647
H11 C6 H12 108.214
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability