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

using model chemistry: CID/3-21G*

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 CID/3-21G*
 hartrees
Energy at 0K-265.802012
Energy at 298.15K-265.809212
HF Energy-265.337175
Nuclear repulsion energy175.727166
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 CID/3-21G*
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' 3211 2988 19.16      
2 A' 3181 2960 56.96      
3 A' 3159 2940 12.21      
4 A' 3143 2924 11.75      
5 A' 1815 1689 213.14      
6 A' 1638 1524 8.34      
7 A' 1620 1507 4.87      
8 A' 1524 1418 9.84      
9 A' 1480 1377 6.80      
10 A' 1478 1375 9.10      
11 A' 1241 1155 434.48      
12 A' 1190 1108 12.97      
13 A' 1050 977 6.13      
14 A' 880 819 11.10      
15 A' 814 757 5.76      
16 A' 379 353 8.72      
17 A' 223 208 7.95      
18 A" 3225 3001 31.76      
19 A" 3195 2973 7.43      
20 A" 1607 1496 5.50      
21 A" 1369 1274 0.02      
22 A" 1250 1163 7.04      
23 A" 1102 1025 0.46      
24 A" 874 814 0.79      
25 A" 330 307 31.35      
26 A" 240 223 4.24      
27 A" 53 50 0.21      

Unscaled Zero Point Vibrational Energy (zpe) 20635.5 cm-1
Scaled (by 0.9305) Zero Point Vibrational Energy (zpe) 19201.4 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 CID/3-21G*
ABC
0.58458 0.09450 0.08390

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.200 -0.247 0.000
C2 -0.713 -0.596 0.000
O3 0.000 0.698 0.000
C4 1.362 0.634 0.000
O5 2.008 -0.396 0.000
H6 -2.801 -1.158 0.000
H7 -2.441 0.340 0.885
H8 -2.441 0.340 -0.885
H9 -0.423 -1.164 -0.883
H10 -0.423 -1.164 0.883
H11 1.771 1.642 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.52742.39443.66954.21061.09111.08951.08952.18612.18614.3977
C21.52741.47762.41262.72842.16212.15592.15591.08951.08953.3440
O32.39441.47761.36362.28663.35992.62142.62142.10412.10412.0072
C43.66952.41261.36361.21604.53243.91623.91622.68372.68371.0877
O54.21062.72842.28661.21604.86904.59594.59592.69832.69832.0518
H61.09112.16213.35994.53244.86901.77691.77692.53672.53675.3614
H71.08952.15592.62143.91624.59591.77691.77043.07662.51754.4971
H81.08952.15592.62143.91624.59591.77691.77042.51753.07664.4971
H92.18611.08952.10412.68372.69832.53673.07662.51751.76663.6704
H102.18611.08952.10412.68372.69832.53672.51753.07661.76663.6704
H114.39773.34402.00721.08772.05185.36144.49714.49713.67043.6704

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 105.638 C1 C2 H9 112.230
C1 C2 H10 112.230 C2 C1 H6 110.209
C2 C1 H7 109.813 C2 C1 H8 109.813
C2 O3 C4 116.181 O3 C2 H9 109.160
O3 C2 H10 109.160 O3 C4 O5 124.757
O3 C4 H11 109.421 O5 C4 H11 125.822
H6 C1 H7 109.152 H6 C1 H8 109.152
H7 C1 H8 108.675 H9 C2 H10 108.338
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability