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All results from a given calculation for HCOOC2H5 (Ethyl formate)

using model chemistry: MP2=FULL/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS trans 1A'
Energy calculated at MP2=FULL/6-31G(2df,p)
 hartrees
Energy at 0K-267.809058
Energy at 298.15K-267.816341
HF Energy-266.856113
Nuclear repulsion energy178.627616
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/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' 3226 3032 9.42      
2 A' 3137 2949 9.91      
3 A' 3129 2941 7.86      
4 A' 3112 2925 53.79      
5 A' 1821 1712 248.49      
6 A' 1555 1462 8.05      
7 A' 1538 1445 2.53      
8 A' 1452 1365 15.47      
9 A' 1424 1339 1.36      
10 A' 1414 1329 2.38      
11 A' 1251 1176 380.45      
12 A' 1161 1091 8.02      
13 A' 1076 1012 15.48      
14 A' 887 833 8.03      
15 A' 805 757 3.51      
16 A' 386 363 5.91      
17 A' 234 220 6.65      
18 A" 3237 3042 14.04      
19 A" 3195 3003 8.07      
20 A" 1530 1438 5.65      
21 A" 1331 1251 1.09      
22 A" 1207 1135 4.46      
23 A" 1073 1009 0.10      
24 A" 827 777 0.91      
25 A" 362 340 18.31      
26 A" 252 236 2.13      
27 A" 72 68 0.46      

Unscaled Zero Point Vibrational Energy (zpe) 20346.5 cm-1
Scaled (by 0.9399) Zero Point Vibrational Energy (zpe) 19123.7 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/6-31G(2df,p)
ABC
0.59412 0.09854 0.08726

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.161 -0.247 0.000
C2 -0.686 -0.554 0.000
O3 0.000 0.709 0.000
C4 1.330 0.605 0.000
O5 1.962 -0.418 0.000
H6 -2.734 -1.173 0.000
H7 -2.432 0.327 0.883
H8 -2.432 0.327 -0.883
H9 -0.383 -1.121 -0.879
H10 -0.383 -1.121 0.879
H11 1.762 1.612 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.50672.36303.59344.12681.08871.08761.08762.16782.16784.3415
C21.50671.43772.32552.65172.13922.14592.14591.08931.08933.2692
O32.36301.43771.33422.26323.31892.61502.61502.06662.06661.9803
C43.59342.32551.33421.20274.43563.87393.87392.58592.58591.0962
O54.12682.65172.26321.20274.75634.54344.54342.60152.60152.0402
H61.08872.13923.31894.43564.75631.76671.76672.51052.51055.2888
H71.08762.14592.61503.87394.54341.76671.76613.06632.50914.4745
H81.08762.14592.61503.87394.54341.76671.76612.50913.06634.4745
H92.16781.08932.06662.58592.60152.51053.06632.50911.75903.5843
H102.16781.08932.06662.58592.60152.51052.50913.06631.75903.5843
H114.34153.26921.98031.09622.04025.28884.47454.47453.58433.5843

picture of Ethyl formate state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 106.720 C1 C2 H9 112.241
C1 C2 H10 112.241 C2 C1 H6 109.973
C2 C1 H7 110.574 C2 C1 H8 110.574
C2 O3 C4 114.003 O3 C2 H9 108.944
O3 C2 H10 108.944 O3 C4 O5 126.204
O3 C4 H11 108.742 O5 C4 H11 125.054
H6 C1 H7 108.545 H6 C1 H8 108.545
H7 C1 H8 108.569 H9 C2 H10 107.677
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability