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

using model chemistry: CISD/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 CISD/6-31G*
 hartrees
Energy at 0K-267.478619
Energy at 298.15K-267.485970
HF Energy-266.828533
Nuclear repulsion energy178.566819
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 CISD/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' 3253 3012 23.27      
2 A' 3220 2981 58.03      
3 A' 3200 2963 16.04      
4 A' 3174 2938 14.46      
5 A' 1931 1788 330.26      
6 A' 1618 1498 6.19      
7 A' 1594 1476 2.66      
8 A' 1529 1416 18.86      
9 A' 1492 1381 3.24      
10 A' 1482 1372 2.10      
11 A' 1328 1229 467.50      
12 A' 1206 1116 12.30      
13 A' 1106 1024 16.82      
14 A' 922 854 13.81      
15 A' 832 770 4.65      
16 A' 401 371 6.93      
17 A' 241 223 8.43      
18 A" 3268 3025 41.04      
19 A" 3245 3004 2.44      
20 A" 1582 1465 5.44      
21 A" 1374 1272 0.93      
22 A" 1257 1164 5.65      
23 A" 1118 1035 1.67      
24 A" 857 793 0.22      
25 A" 355 329 26.56      
26 A" 254 235 3.59      
27 A" 76 70 0.55      

Unscaled Zero Point Vibrational Energy (zpe) 20955.9 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 19401.0 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 CISD/6-31G*
ABC
0.60579 0.09747 0.08666

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.168 -0.267 0.000
C2 -0.689 -0.570 0.000
O3 0.000 0.691 0.000
C4 1.327 0.625 0.000
O5 1.979 -0.380 0.000
H6 -2.736 -1.196 0.000
H7 -2.443 0.306 0.883
H8 -2.443 0.306 -0.883
H9 -0.387 -1.134 -0.879
H10 -0.387 -1.134 0.879
H11 1.747 1.633 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.50922.37043.60734.14841.08881.08761.08762.16652.16654.3517
C21.50921.43672.34382.67492.14062.14932.14931.08721.08723.2842
O32.37041.43671.32872.25013.32392.62582.62582.06212.06211.9846
C43.60732.34381.32871.19804.45283.88503.88502.60892.60891.0916
O54.14842.67492.25011.19804.78514.56074.56072.63442.63442.0262
H61.08882.14063.32394.45284.78511.76661.76662.50862.50865.3010
H71.08762.14932.62583.88504.56071.76661.76533.06592.50924.4826
H81.08762.14932.62583.88504.56071.76661.76532.50923.06594.4826
H92.16651.08722.06212.60892.63442.50863.06592.50921.75793.6030
H102.16651.08722.06212.60892.63442.50862.50923.06591.75793.6030
H114.35173.28421.98461.09162.02625.30104.48264.48263.60303.6030

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 107.124 C1 C2 H9 112.085
C1 C2 H10 112.085 C2 C1 H6 109.903
C2 C1 H7 110.669 C2 C1 H8 110.669
C2 O3 C4 115.836 O3 C2 H9 108.787
O3 C2 H10 108.787 O3 C4 O5 125.794
O3 C4 H11 109.777 O5 C4 H11 124.429
H6 C1 H7 108.521 H6 C1 H8 108.521
H7 C1 H8 108.494 H9 C2 H10 107.890
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability