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All results from a given calculation for CH3OCHO (methyl formate)

using model chemistry: CCSD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCSD/6-31G(2df,p)
 hartrees
Energy at 0K-228.585477
Energy at 298.15K-228.590451
Nuclear repulsion energy 
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/6-31G(2df,p)
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' 3221 3045 11.11      
2 A' 3117 2947 32.65      
3 A' 3109 2940 31.27      
4 A' 1864 1763 258.93      
5 A' 1531 1448 10.04      
6 A' 1504 1422 3.75      
7 A' 1437 1359 1.87      
8 A' 1277 1208 267.18      
9 A' 1224 1158 50.25      
10 A' 984 930 22.31      
11 A' 794 751 8.24      
12 A' 316 299 14.56      
13 A" 3193 3019 14.83      
14 A" 1518 1436 6.89      
15 A" 1208 1142 1.52      
16 A" 1082 1023 0.40      
17 A" 347 328 25.70      
18 A" 158 149 0.10      

Unscaled Zero Point Vibrational Energy (zpe) 13941.3 cm-1
Scaled (by 0.9455) Zero Point Vibrational Energy (zpe) 13181.5 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/6-31G(2df,p)
ABC
0.66792 0.23429 0.17930

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.346 0.398 0.000
O2 0.000 0.875 0.000
C3 -0.920 -0.085 0.000
O4 -0.712 -1.265 0.000
H5 1.976 1.285 0.000
H6 1.540 -0.207 0.888
H7 1.540 -0.207 -0.888
H8 -1.916 0.376 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.42782.31622.64541.08791.09111.09113.2614
O21.42781.32982.25562.01762.08042.08041.9798
C32.31621.32981.19813.20312.61732.61731.0975
O42.64542.25561.19813.70462.64152.64152.0351
H51.08792.01763.20313.70461.78921.78923.9961
H61.09112.08042.61732.64151.78921.77523.6146
H71.09112.08042.61732.64151.78921.77523.6146
H83.26141.97981.09752.03513.99613.61463.6146

picture of methyl formate state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 C3 114.220 O2 C1 H5 105.852
O2 C1 H6 110.653 O2 C1 H7 110.653
O2 C3 O4 126.250 O2 C3 H8 108.925
O4 C3 H8 124.825 H5 C1 H6 110.392
H5 C1 H7 110.392 H6 C1 H7 108.882
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability