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: QCISD(T)/aug-cc-pVDZ

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 QCISD(T)/aug-cc-pVDZ
Rotational Constants (cm-1) from geometry optimized at QCISD(T)/aug-cc-pVDZ
See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/aug-cc-pVDZ
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at QCISD(T)/aug-cc-pVDZ
 hartrees
Energy at 0K-268.665697
Energy at 298.15K 
HF Energy-267.696710
Nuclear repulsion energy219.863862
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 QCISD(T)/aug-cc-pVDZ
Rotational Constants (cm-1) from geometry optimized at QCISD(T)/aug-cc-pVDZ
See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 1.051 -0.247 0.000
C2 0.000 0.655 0.000
C3 0.498 -1.514 0.000
C4 -1.200 -0.023 0.000
C5 -0.876 -1.441 0.000
C6 0.371 2.109 0.000
H7 1.206 -2.341 0.000
H8 -2.192 0.432 0.000
H9 -1.567 -2.285 0.000
H10 -0.547 2.719 0.000
H11 0.966 2.365 0.896
H12 0.966 2.365 -0.896

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12
O11.38511.38272.26272.26702.45192.10013.31393.31813.36952.76282.7628
C21.38512.22511.37842.27131.50053.22992.20373.33142.13562.15902.1590
C31.38272.22512.25971.37543.62481.08943.31982.20404.36014.00884.0088
C42.26271.37842.25971.45462.64833.34161.09122.29172.81863.34653.3465
C52.26702.27131.37541.45463.76222.26842.28901.09114.17294.32234.3223
C62.45191.50053.62482.64833.76224.52773.06344.80231.10301.10541.1054
H72.10013.22991.08943.34162.26844.52774.38632.77385.35574.79714.7971
H83.31392.20373.31981.09122.28903.06344.38632.78772.81753.81023.8102
H93.31813.33142.20402.29171.09114.80232.77382.78775.10705.37085.3708
H103.36952.13564.36012.81864.17291.10305.35572.81755.10701.79401.7940
H112.76282.15904.00883.34654.32231.10544.79713.81025.37081.79401.7911
H122.76282.15904.00883.34654.32231.10544.79713.81025.37081.79401.7911

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 109.929 O1 C2 C6 116.295
O1 C3 C5 110.562 O1 C3 H7 115.818
C2 O1 C3 107.013 C2 C4 C5 106.561
C2 C4 H8 125.935 C2 C6 H10 109.277
C2 C6 H11 110.985 C2 C6 H12 110.985
C3 C5 C6 73.688 C3 C5 H9 126.268
C4 C2 C6 133.776 C4 C5 H9 127.797
C5 C3 H7 133.621 C5 C4 H8 127.504
H10 C6 H11 108.652 H10 C6 H12 108.652
H11 C6 H12 108.226
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability