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

using model chemistry: G4

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 G4
 hartrees
Energy at 0K-268.238954
Energy at 298.15K-268.232192
HF Energy-268.404022
Nuclear repulsion energy177.497880
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 B3LYP/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' 3122 3012 20.19      
2 A' 3054 2947 12.86      
3 A' 3047 2940 13.27      
4 A' 3028 2922 68.27      
5 A' 1821 1757 272.44      
6 A' 1518 1465 7.06      
7 A' 1496 1444 2.09      
8 A' 1421 1372 9.99      
9 A' 1406 1357 1.70      
10 A' 1393 1344 3.63      
11 A' 1217 1175 378.27      
12 A' 1132 1092 10.36      
13 A' 1033 996 19.67      
14 A' 857 827 11.44      
15 A' 791 763 1.92      
16 A' 378 365 5.48      
17 A' 224 217 6.68      
18 A" 3128 3018 31.99      
19 A" 3093 2985 6.79      
20 A" 1486 1434 4.53      
21 A" 1291 1246 1.16      
22 A" 1183 1141 4.29      
23 A" 1046 1009 0.34      
24 A" 807 779 0.69      
25 A" 348 336 18.23      
26 A" 230 222 1.61      
27 A" 54 52 0.61      

Unscaled Zero Point Vibrational Energy (zpe) 19801.5 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 19108.4 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 B3LYP/6-31G(2df,p)
ABC
0.59957 0.09614 0.08551

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.182 -0.278 0.000
C2 -0.694 -0.571 0.000
O3 0.000 0.698 0.000
C4 1.336 0.629 0.000
O5 1.993 -0.376 0.000
H6 -2.743 -1.217 0.000
H7 -2.467 0.294 0.887
H8 -2.467 0.294 -0.887
H9 -0.385 -1.139 -0.883
H10 -0.385 -1.139 0.883
H11 1.743 1.652 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.51592.39023.63284.17611.09401.09361.09362.17922.17924.3736
C21.51591.44652.35852.69472.14822.16312.16311.09441.09443.2989
O32.39021.44651.33772.26413.34552.65282.65282.07432.07431.9869
C43.63282.35851.33771.20094.47743.91973.91972.62072.62071.1012
O54.17612.69472.26411.20094.81044.59714.59712.64912.64912.0439
H61.09402.14823.34554.47744.81041.77421.77422.51902.51905.3251
H71.09362.16312.65283.91974.59711.77421.77363.08592.52834.5116
H81.09362.16312.65283.91974.59711.77421.77362.52833.08594.5116
H92.17921.09442.07432.62072.64912.51903.08592.52831.76503.6194
H102.17921.09442.07432.62072.64912.51902.52833.08591.76503.6194
H114.37363.29891.98691.10122.04395.32514.51164.51163.61943.6194

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 107.560 C1 C2 H9 112.190
C1 C2 H10 112.190 C2 C1 H6 109.731
C2 C1 H7 110.949 C2 C1 H8 110.949
C2 O3 C4 115.751 O3 C2 H9 108.657
O3 C2 H10 108.657 O3 C4 O5 126.136
O3 C4 H11 108.719 O5 C4 H11 125.145
H6 C1 H7 108.383 H6 C1 H8 108.383
H7 C1 H8 108.368 H9 C2 H10 107.492
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.391      
2 C -0.040      
3 O -0.203      
4 C 0.186      
5 O -0.303      
6 H 0.125      
7 H 0.132      
8 H 0.132      
9 H 0.127      
10 H 0.127      
11 H 0.108      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.000 0.524 0.000 2.068
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 135.740
(<r2>)1/2 11.651