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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-266.747973
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 3168 0.51      
2 A' 3296 3135 0.42      
3 A' 3282 3122 2.19      
4 A' 3170 3016 8.54      
5 A' 3089 2939 13.73      
6 A' 1619 1540 4.23      
7 A' 1579 1502 9.40      
8 A' 1498 1425 4.13      
9 A' 1493 1420 14.08      
10 A' 1401 1333 3.88      
11 A' 1293 1230 10.09      
12 A' 1223 1164 14.13      
13 A' 1176 1119 12.93      
14 A' 1080 1028 15.81      
15 A' 1051 1000 2.68      
16 A' 1006 957 2.93      
17 A' 917 873 1.34      
18 A' 891 848 21.87      
19 A' 647 615 1.91      
20 A' 328 312 2.28      
21 A" 3152 2999 12.22      
22 A" 1579 1502 6.74      
23 A" 1134 1079 3.31      
24 A" 810 771 4.97      
25 A" 780 742 17.61      
26 A" 731 695 61.51      
27 A" 620 590 6.27      
28 A" 606 577 4.17      
29 A" 233 222 7.09      
30 A" 105 100 0.13      

Unscaled Zero Point Vibrational Energy (zpe) 21559.2 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 20509.2 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