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

using model chemistry: QCISD/6-31G**

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 QCISD/6-31G**
 hartrees
Energy at 0K-267.653502
Energy at 298.15K-267.660765
HF Energy-266.835911
Nuclear repulsion energy177.455136
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 QCISD/6-31G**
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' 3202 3014 23.66      
2 A' 3145 2961 59.86      
3 A' 3133 2950 18.80      
4 A' 3117 2934 15.33      
5 A' 1838 1731 264.69      
6 A' 1577 1485 5.30      
7 A' 1557 1465 2.00      
8 A' 1484 1397 16.19      
9 A' 1443 1359 2.09      
10 A' 1437 1353 7.64      
11 A' 1256 1182 407.57      
12 A' 1170 1102 6.99      
13 A' 1072 1010 12.94      
14 A' 888 836 12.87      
15 A' 800 753 3.94      
16 A' 389 366 6.15      
17 A' 235 222 7.30      
18 A" 3213 3025 36.81      
19 A" 3182 2995 9.81      
20 A" 1546 1455 3.87      
21 A" 1330 1252 0.80      
22 A" 1221 1149 4.90      
23 A" 1059 997 0.72      
24 A" 834 785 0.07      
25 A" 348 327 22.71      
26 A" 250 235 3.00      
27 A" 71 67 0.43      

Unscaled Zero Point Vibrational Energy (zpe) 20398.5 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 19203.1 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 QCISD/6-31G**
ABC
0.59049 0.09683 0.08586

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.177 -0.253 0.000
C2 -0.696 -0.562 0.000
O3 0.000 0.708 0.000
C4 1.342 0.616 0.000
O5 1.981 -0.413 0.000
H6 -2.748 -1.182 0.000
H7 -2.449 0.322 0.885
H8 -2.449 0.322 -0.885
H9 -0.394 -1.128 -0.881
H10 -0.394 -1.128 0.881
H11 1.774 1.622 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.51342.38013.62484.16151.09061.08951.08952.17382.17384.3731
C21.51341.44822.35342.68102.14412.15372.15371.09051.09053.2962
O32.38011.44821.34492.27623.33562.63272.63272.07502.07501.9949
C43.62482.35341.34491.21104.46773.90403.90402.61362.61361.0946
O54.16152.68102.27621.21104.79144.57724.57722.63212.63212.0449
H61.09062.14413.33564.46774.79141.77041.77042.51462.51465.3205
H71.08952.15372.63273.90404.57721.77041.76933.07382.51594.5061
H81.08952.15372.63273.90404.57721.77041.76932.51593.07384.5061
H92.17381.09052.07502.61362.63212.51463.07382.51591.76253.6106
H102.17381.09052.07502.61362.63212.51462.51593.07381.76253.6106
H114.37313.29621.99491.09462.04495.32054.50614.50613.61063.6106

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 106.940 C1 C2 H9 112.173
C1 C2 H10 112.173 C2 C1 H6 109.781
C2 C1 H7 110.612 C2 C1 H8 110.612
C2 O3 C4 114.774 O3 C2 H9 108.822
O3 C2 H10 108.822 O3 C4 O5 125.806
O3 C4 H11 109.294 O5 C4 H11 124.900
H6 C1 H7 108.600 H6 C1 H8 108.600
H7 C1 H8 108.580 H9 C2 H10 107.828
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability