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

using model chemistry: MP2=FULL/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2=FULL/cc-pVTZ
 hartrees
Energy at 0K-228.734017
Energy at 298.15K-228.738994
HF Energy-227.876589
Nuclear repulsion energy122.940526
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=FULL/cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3231 3067 8.98      
2 A' 3128 2969 37.36      
3 A' 3119 2962 31.18      
4 A' 1803 1712 257.40      
5 A' 1533 1456 10.14      
6 A' 1489 1414 3.91      
7 A' 1424 1352 1.24      
8 A' 1262 1198 259.70      
9 A' 1205 1144 61.25      
10 A' 973 924 24.79      
11 A' 783 743 8.11      
12 A' 312 296 13.68      
13 A" 3197 3035 13.67      
14 A" 1521 1444 9.39      
15 A" 1199 1139 1.45      
16 A" 1071 1017 0.03      
17 A" 349 332 24.76      
18 A" 162 154 0.08      

Unscaled Zero Point Vibrational Energy (zpe) 13880.3 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 13177.9 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 MP2=FULL/cc-pVTZ
ABC
0.66675 0.23492 0.17951

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.344 0.399 0.000
O2 0.000 0.876 0.000
C3 -0.920 -0.085 0.000
O4 -0.709 -1.267 0.000
H5 1.968 1.280 0.000
H6 1.535 -0.201 0.882
H7 1.535 -0.201 -0.882
H8 -1.909 0.373 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.42582.31492.64401.07981.08361.08363.2527
O21.42581.33032.25742.00952.07182.07181.9740
C32.31491.33031.20083.19472.61092.61091.0898
O42.64402.25741.20083.69552.63632.63632.0322
H51.07982.00953.19473.69551.77701.77703.9819
H61.08362.07182.61092.63631.77701.76373.6008
H71.08362.07182.61092.63631.77701.76373.6008
H83.25271.97401.08982.03223.98193.60083.6008

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 114.219 O2 C1 H5 105.820
O2 C1 H6 110.568 O2 C1 H7 110.568
O2 C3 O4 126.135 O2 C3 H8 108.899
O4 C3 H8 124.966 H5 C1 H6 110.460
H5 C1 H7 110.460 H6 C1 H7 108.946
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability