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

using model chemistry: CCSD(T)/6-31G*

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

Conformer 2 (CS)

Jump to S1C1
Energy calculated at CCSD(T)/6-31G*
 hartrees
Energy at 0K-268.554359
Energy at 298.15K-268.560832
HF Energy-267.664751
Nuclear repulsion energy221.347630
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 CCSD(T)/6-31G*
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' 3290 3165        
2 A' 3262 3138        
3 A' 3250 3127        
4 A' 3147 3028        
5 A' 3054 2939        
6 A' 1670 1607        
7 A' 1575 1516        
8 A' 1537 1479        
9 A' 1456 1401        
10 A' 1433 1378        
11 A' 1282 1233        
12 A' 1263 1215        
13 A' 1194 1149        
14 A' 1123 1080        
15 A' 1054 1014        
16 A' 1006 968        
17 A' 939 904        
18 A' 896 862        
19 A' 659 634        
20 A' 334 321        
21 A" 3121 3002        
22 A" 1517 1459        
23 A" 1080 1039        
24 A" 774 745        
25 A" 755 726        
26 A" 709 682        
27 A" 607 584        
28 A" 564 542        
29 A" 235 226        
30 A" 119 114        

Unscaled Zero Point Vibrational Energy (zpe) 21451.6 cm-1
Scaled (by 0.9621) Zero Point Vibrational Energy (zpe) 20638.5 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 CCSD(T)/6-31G*
ABC
0.29063 0.11727 0.08489

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 1.044 -0.249 0.000
C2 0.000 0.650 0.000
C3 0.486 -1.506 0.000
C4 -1.191 -0.020 0.000
C5 -0.874 -1.427 0.000
C6 0.378 2.094 0.000
H7 1.190 -2.329 0.000
H8 -2.179 0.430 0.000
H9 -1.570 -2.259 0.000
H10 -0.529 2.711 0.000
H11 0.972 2.347 0.888
H12 0.972 2.347 -0.888

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12
O11.37811.37472.24702.25102.43632.08513.29393.29763.35212.74502.7450
C21.37812.21021.36672.25351.49263.20832.19013.30612.12742.14802.1480
C31.37472.21022.24111.36313.60161.08323.29422.19014.33713.98373.9837
C42.24701.36672.24111.44212.63263.31731.08542.27132.80993.32753.3275
C52.25102.25351.36311.44213.73692.25332.26921.08494.15194.29434.2943
C62.43631.49263.60162.63263.73694.49743.05064.76931.09641.09851.0985
H72.08513.20831.08323.31732.25334.49744.35492.76125.32524.76494.7649
H83.29392.19013.29421.08542.26923.05064.35492.75742.81513.79413.7941
H93.29763.30612.19012.27131.08494.76932.76122.75745.07805.33595.3359
H103.35212.12744.33712.80994.15191.09645.32522.81515.07801.78191.7819
H112.74502.14803.98373.32754.29431.09854.76493.79415.33591.78191.7766
H122.74502.14803.98373.32754.29431.09854.76493.79415.33591.78191.7766

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 109.900 O1 C2 C6 116.085
O1 C3 C5 110.607 O1 C3 H7 115.545
C2 O1 C3 106.811 C2 C4 C5 106.665
C2 C4 H8 126.158 C2 C6 H10 109.565
C2 C6 H11 111.084 C2 C6 H12 111.084
C3 C5 C6 73.749 C3 C5 H9 126.553
C4 C2 C6 134.014 C4 C5 H9 127.431
C5 C3 H7 133.848 C5 C4 H8 127.177
H10 C6 H11 108.549 H10 C6 H12 108.549
H11 C6 H12 107.931
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability