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: CCD/6-31+G**

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 CCD/6-31+G**
Rotational Constants (cm-1) from geometry optimized at CCD/6-31+G**
See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31+G**
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at CCD/6-31+G**
 hartrees
Energy at 0K-268.575947
Energy at 298.15K 
HF Energy-267.685010
Nuclear repulsion energy222.184085
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 CCD/6-31+G**
Rotational Constants (cm-1) from geometry optimized at CCD/6-31+G**
See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 1.038 -0.248 0.000
C2 0.000 0.648 0.000
C3 0.488 -1.501 0.000
C4 -1.186 -0.020 0.000
C5 -0.868 -1.425 0.000
C6 0.373 2.091 0.000
H7 1.185 -2.320 0.000
H8 -2.166 0.428 0.000
H9 -1.555 -2.255 0.000
H10 -0.529 2.700 0.000
H11 0.962 2.341 0.883
H12 0.962 2.341 -0.883

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12
O11.37101.36852.23582.24022.43142.07713.27423.27863.33892.73692.7369
C21.37102.20401.36152.24771.49033.19582.17703.29302.11952.13862.1386
C31.36852.20402.23571.35843.59401.07533.28142.17754.32303.97133.9713
C42.23581.36152.23571.44092.62433.30381.07732.26502.79843.31243.3124
C52.24022.24771.35841.44093.72882.24002.26291.07694.13944.27994.2799
C62.43141.49033.59402.62433.72884.48483.03474.75411.08891.09091.0909
H72.07713.19581.07533.30382.24004.48484.33412.74115.30494.74944.7494
H83.27422.17703.28141.07732.26293.03474.33412.75202.79973.77143.7714
H93.27863.29302.17752.26501.07694.75412.74112.75205.06005.31415.3141
H103.33892.11954.32302.79844.13941.08895.30492.79975.06001.77021.7702
H112.73692.13863.97133.31244.27991.09094.74943.77145.31411.77021.7667
H122.73692.13863.97133.31244.27991.09094.74943.77145.31411.77021.7667

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 109.816 O1 C2 C6 116.312
O1 C3 C5 110.473 O1 C3 H7 115.889
C2 O1 C3 107.126 C2 C4 C5 106.619
C2 C4 H8 126.021 C2 C6 H10 109.536
C2 C6 H11 110.945 C2 C6 H12 110.945
C3 C5 C6 73.765 C3 C5 H9 126.413
C4 C2 C6 133.872 C4 C5 H9 127.621
C5 C3 H7 133.638 C5 C4 H8 127.360
H10 C6 H11 108.601 H10 C6 H12 108.601
H11 C6 H12 108.145
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability