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All results from a given calculation for C5H6O (2-methylfuran)

using model chemistry: CID/3-21G*

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 CID/3-21G*
Rotational Constants (cm-1) from geometry optimized at CID/3-21G*
See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/3-21G*
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at CID/3-21G*
 hartrees
Energy at 0K-266.677956
Energy at 298.15K-266.684710
HF Energy-266.176293
Nuclear repulsion energy220.595064
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 CID/3-21G*
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' 3395 3159 0.63      
2 A' 3359 3125 0.30      
3 A' 3345 3113 3.70      
4 A' 3216 2993 9.41      
5 A' 3137 2919 14.73      
6 A' 1702 1584 11.49      
7 A' 1619 1506 1.98      
8 A' 1588 1478 25.90      
9 A' 1530 1424 3.37      
10 A' 1456 1355 1.62      
11 A' 1334 1241 10.66      
12 A' 1262 1175 16.28      
13 A' 1218 1133 10.18      
14 A' 1132 1054 18.88      
15 A' 1069 994 1.69      
16 A' 1043 971 3.84      
17 A' 956 890 2.83      
18 A' 941 875 30.15      
19 A' 669 622 1.84      
20 A' 337 313 2.70      
21 A" 3191 2969 12.53      
22 A" 1599 1488 7.01      
23 A" 1162 1082 5.26      
24 A" 917 854 0.58      
25 A" 865 805 15.40      
26 A" 798 742 68.33      
27 A" 659 613 3.37      
28 A" 632 588 10.09      
29 A" 250 233 8.58      
30 A" 120 112 0.16      

Unscaled Zero Point Vibrational Energy (zpe) 22250.4 cm-1
Scaled (by 0.9305) Zero Point Vibrational Energy (zpe) 20704.0 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 CID/3-21G*
ABC
0.29128 0.11572 0.08412

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 1.055 -0.258 0.000
C2 0.000 0.660 0.000
C3 0.478 -1.534 0.000
C4 -1.179 -0.007 0.000
C5 -0.870 -1.429 0.000
C6 0.365 2.110 0.000
H7 1.161 -2.360 0.000
H8 -2.159 0.434 0.000
H9 -1.576 -2.238 0.000
H10 -0.542 2.714 0.000
H11 0.955 2.358 0.884
H12 0.955 2.358 -0.884

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12
O11.39891.39992.24872.25312.46682.10383.28803.29283.37412.76352.7635
C21.39892.24521.35482.26251.49533.23492.17093.29862.12412.13932.1393
C31.39992.24522.25361.35243.64541.07133.29032.17164.36844.01934.0193
C42.24871.35482.25361.45492.62043.31831.07432.26592.79453.30593.3059
C52.25312.26251.35241.45493.74792.23412.26491.07394.15554.29534.2953
C62.46681.49533.64542.62043.74794.53973.03014.76141.08961.09141.0914
H72.10383.23491.07133.31832.23414.53974.33862.73955.35144.80414.8041
H83.28802.17093.29031.07432.26493.03014.33862.73442.79563.76573.7657
H93.29283.29862.17162.26591.07394.76142.73952.73445.05865.32055.3205
H103.37412.12414.36842.79454.15551.08965.35142.79565.05861.77421.7742
H112.76352.13934.01933.30594.29531.09144.80413.76575.32051.77421.7686
H122.76352.13934.01933.30594.29531.09144.80413.76575.32051.77421.7686

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 109.483 O1 C2 C6 116.892
O1 C3 C5 109.884 O1 C3 H7 116.081
C2 O1 C3 106.685 C2 C4 C5 107.215
C2 C4 H8 126.297 C2 C6 H10 109.526
C2 C6 H11 110.629 C2 C6 H12 110.629
C3 C5 C6 75.217 C3 C5 H9 126.642
C4 C2 C6 133.625 C4 C5 H9 126.625
C5 C3 H7 134.035 C5 C4 H8 126.488
H10 C6 H11 108.883 H10 C6 H12 108.883
H11 C6 H12 108.246
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability