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

using model chemistry: MP2/CEP-31G*

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/CEP-31G*
 hartrees
Energy at 0K-52.059934
Energy at 298.15K-52.067139
HF Energy-51.352179
Nuclear repulsion energy98.522474
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/CEP-31G*
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' 3200 3038 28.32      
2 A' 3134 2976 56.00      
3 A' 3127 2969 29.60      
4 A' 3102 2945 19.24      
5 A' 1776 1686 313.69      
6 A' 1538 1460 7.81      
7 A' 1523 1446 2.35      
8 A' 1461 1388 23.10      
9 A' 1407 1336 5.35      
10 A' 1392 1322 1.85      
11 A' 1226 1164 413.32      
12 A' 1155 1096 7.75      
13 A' 1054 1001 18.70      
14 A' 869 825 13.03      
15 A' 778 738 2.04      
16 A' 377 358 6.27      
17 A' 230 218 7.15      
18 A" 3216 3054 50.35      
19 A" 3193 3031 4.58      
20 A" 1514 1438 6.30      
21 A" 1315 1248 0.33      
22 A" 1198 1137 6.31      
23 A" 1022 970 0.48      
24 A" 821 779 0.85      
25 A" 347 329 25.39      
26 A" 247 234 3.49      
27 A" 84 80 0.52      

Unscaled Zero Point Vibrational Energy (zpe) 20152.5 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 19132.7 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/CEP-31G*
ABC
0.57349 0.09510 0.08421

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.199 -0.245 0.000
C2 -0.702 -0.569 0.000
O3 0.000 0.719 0.000
C4 1.353 0.618 0.000
O5 2.000 -0.428 0.000
H6 -2.778 -1.187 0.000
H7 -2.469 0.336 0.897
H8 -2.469 0.336 -0.897
H9 -0.393 -1.134 -0.895
H10 -0.393 -1.134 0.895
H11 1.791 1.633 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.53232.40163.65554.20301.10461.10281.10282.20342.20344.4104
C21.53231.46662.37232.70482.16612.17882.17881.10291.10293.3258
O32.40161.46661.35672.30573.36862.65452.65452.09542.09542.0106
C43.65552.37231.35671.23004.50733.93563.93562.63002.63001.1062
O54.20302.70482.30571.23004.83714.62144.62142.65002.65002.0725
H61.10462.16613.36864.50734.83711.79441.79442.54792.54795.3687
H71.10282.17882.65453.93564.62141.79441.79433.11212.54414.5422
H81.10282.17882.65453.93564.62141.79441.79432.54413.11214.5422
H92.20341.10292.09542.63002.65002.54793.11212.54411.79053.6371
H102.20341.10292.09542.63002.65002.54792.54413.11211.79053.6371
H114.41043.32582.01061.10622.07255.36874.54224.54223.63713.6371

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 106.400 C1 C2 H9 112.445
C1 C2 H10 112.445 C2 C1 H6 109.394
C2 C1 H7 110.497 C2 C1 H8 110.497
C2 O3 C4 114.277 O3 C2 H9 108.438
O3 C2 H10 108.438 O3 C4 O5 126.027
O3 C4 H11 109.025 O5 C4 H11 124.948
H6 C1 H7 108.761 H6 C1 H8 108.761
H7 C1 H8 108.890 H9 C2 H10 108.519
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability