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

Conformer 2 (CS)

Jump to S1C1
Energy calculated at CCSD(T)=FULL/cc-pVDZ
 hartrees
Energy at 0K-268.629184
Energy at 298.15K-268.635766
HF Energy-267.685796
Nuclear repulsion energy220.648854
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)=FULL/cc-pVDZ
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' 3300 3178        
2 A' 3275 3154        
3 A' 3262 3142        
4 A' 3160 3044        
5 A' 3055 2942        
6 A' 1653 1592        
7 A' 1560 1503        
8 A' 1489 1434        
9 A' 1420 1368        
10 A' 1406 1355        
11 A' 1267 1221        
12 A' 1243 1198        
13 A' 1176 1133        
14 A' 1107 1067        
15 A' 1025 988        
16 A' 984 948        
17 A' 933 899        
18 A' 888 855        
19 A' 656 632        
20 A' 330 318        
21 A" 3130 3015        
22 A" 1468 1414        
23 A" 1058 1019        
24 A" 828 798        
25 A" 790 761        
26 A" 734 707        
27 A" 621 598        
28 A" 592 570        
29 A" 241 232        
30 A" 131 126        

Unscaled Zero Point Vibrational Energy (zpe) 21391.1 cm-1
Scaled (by 0.9632) Zero Point Vibrational Energy (zpe) 20603.9 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)=FULL/cc-pVDZ
ABC
0.28801 0.11674 0.08441

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 1.049 -0.241 0.000
C2 0.000 0.648 0.000
C3 0.505 -1.501 0.000
C4 -1.198 -0.029 0.000
C5 -0.867 -1.441 0.000
C6 0.359 2.102 0.000
H7 1.217 -2.324 0.000
H8 -2.191 0.423 0.000
H9 -1.554 -2.289 0.000
H10 -0.560 2.710 0.000
H11 0.954 2.364 0.893
H12 0.954 2.364 -0.893

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12
O11.37481.37242.25652.26102.44172.09073.30713.31213.36122.75512.7551
C21.37482.20741.37612.26231.49703.21242.20283.32312.13682.15692.1569
C31.37242.20742.25031.37333.60521.08943.31172.20444.34353.99183.9918
C42.25651.37612.25031.45022.63893.33201.09132.28792.81253.34013.3401
C52.26102.26231.37331.45023.74902.26422.28621.09114.16274.31214.3121
C62.44171.49703.60522.63893.74904.50863.05324.78931.10271.10521.1052
H72.09073.21241.08943.33202.26424.50864.37792.77155.33954.77994.7799
H83.30712.20283.31171.09132.28623.05324.37792.78582.80923.80273.8027
H93.31213.32312.20442.28791.09114.78932.77152.78585.09715.36095.3609
H103.36122.13684.34352.81254.16271.10275.33952.80925.09711.79251.7925
H112.75512.15693.99183.34014.31211.10524.77993.80275.36091.79251.7869
H122.75512.15693.99183.34014.31211.10524.77993.80275.36091.79251.7869

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 110.225 O1 C2 C6 116.410
O1 C3 C5 110.872 O1 C3 H7 115.781
C2 O1 C3 106.931 C2 C4 C5 106.314
C2 C4 H8 126.050 C2 C6 H10 109.627
C2 C6 H11 111.072 C2 C6 H12 111.072
C3 C5 C6 73.390 C3 C5 H9 126.511
C4 C2 C6 133.365 C4 C5 H9 127.831
C5 C3 H7 133.347 C5 C4 H8 127.636
H10 C6 H11 108.554 H10 C6 H12 108.554
H11 C6 H12 107.883
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability