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

using model chemistry: MP2/3-21G

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 MP2/3-21G
Rotational Constants (cm-1) from geometry optimized at MP2/3-21G
See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at MP2/3-21G
 hartrees
Energy at 0K-266.741465
Energy at 298.15K-266.747988
HF Energy-266.172015
Nuclear repulsion energy218.586660
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 MP2/3-21G
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' 3330 3179 0.51      
2 A' 3296 3146 0.42      
3 A' 3282 3133 2.19      
4 A' 3170 3026 8.54      
5 A' 3089 2949 13.73      
6 A' 1619 1545 4.23      
7 A' 1579 1507 9.40      
8 A' 1498 1430 4.13      
9 A' 1493 1425 14.08      
10 A' 1401 1337 3.88      
11 A' 1293 1234 10.09      
12 A' 1223 1168 14.13      
13 A' 1176 1123 12.93      
14 A' 1080 1031 15.81      
15 A' 1051 1003 2.68      
16 A' 1006 960 2.93      
17 A' 917 876 1.34      
18 A' 891 851 21.87      
19 A' 647 617 1.91      
20 A' 328 313 2.28      
21 A" 3152 3009 12.22      
22 A" 1579 1507 6.74      
23 A" 1134 1083 3.31      
24 A" 810 774 4.97      
25 A" 780 745 17.61      
26 A" 731 698 61.51      
27 A" 620 592 6.27      
28 A" 606 579 4.17      
29 A" 233 223 7.09      
30 A" 105 100 0.13      

Unscaled Zero Point Vibrational Energy (zpe) 21559.2 cm-1
Scaled (by 0.9545) Zero Point Vibrational Energy (zpe) 20578.2 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 MP2/3-21G
ABC
0.28380 0.11419 0.08270

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 1.076 -0.258 0.000
C2 0.000 0.668 0.000
C3 0.484 -1.547 0.000
C4 -1.192 -0.015 0.000
C5 -0.883 -1.435 0.000
C6 0.364 2.124 0.000
H7 1.172 -2.375 0.000
H8 -2.177 0.429 0.000
H9 -1.590 -2.250 0.000
H10 -0.554 2.720 0.000
H11 0.951 2.380 0.888
H12 0.951 2.380 -0.888

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12
O11.42011.41842.28142.28562.48612.11913.32463.32853.39522.78672.7867
C21.42012.26751.37392.28101.50013.26132.18973.32332.12522.15032.1503
C31.41842.26752.27081.37173.67261.07663.31392.19054.39154.05344.0534
C42.28141.37392.27081.45322.64463.34061.07982.27012.80843.33423.3342
C52.28562.28101.37171.45323.77062.26002.26851.07914.16804.32514.3251
C62.48611.50013.67262.64463.77064.57083.05384.79011.09441.09531.0953
H72.11913.26131.07663.34062.26004.57084.36742.76555.37964.84274.8427
H83.32462.18973.31391.07982.26853.05384.36742.74172.80773.79173.7917
H93.32853.32332.19052.27011.07914.79012.76552.74175.07675.35575.3557
H103.39522.12524.39152.80844.16801.09445.37962.80775.07671.78001.7800
H112.78672.15034.05343.33424.32511.09534.84273.79175.35571.78001.7769
H122.78672.15034.05343.33424.32511.09534.84273.79175.35571.78001.7769

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 109.466 O1 C2 C6 116.689
O1 C3 C5 109.995 O1 C3 H7 115.599
C2 O1 C3 106.037 C2 C4 C5 107.540
C2 C4 H8 125.929 C2 C6 H10 108.991
C2 C6 H11 110.925 C2 C6 H12 110.925
C3 C5 C6 75.379 C3 C5 H9 126.285
C4 C2 C6 133.845 C4 C5 H9 126.752
C5 C3 H7 134.406 C5 C4 H8 126.530
H10 C6 H11 108.765 H10 C6 H12 108.765
H11 C6 H12 108.416
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability