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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-267.604804
Energy at 298.15K-267.612048
HF Energy-266.825718
Nuclear repulsion energy177.183419
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' 3157 3006 22.02      
2 A' 3111 2962 58.40      
3 A' 3097 2950 15.73      
4 A' 3079 2932 14.21      
5 A' 1836 1748 265.84      
6 A' 1569 1494 5.98      
7 A' 1548 1474 2.82      
8 A' 1478 1408 17.81      
9 A' 1435 1366 1.99      
10 A' 1431 1362 4.67      
11 A' 1256 1196 407.31      
12 A' 1168 1113 8.17      
13 A' 1071 1020 14.82      
14 A' 885 843 12.26      
15 A' 800 762 3.40      
16 A' 389 371 6.52      
17 A' 236 225 7.49      
18 A" 3169 3018 35.67      
19 A" 3141 2992 6.88      
20 A" 1537 1463 5.34      
21 A" 1325 1262 0.59      
22 A" 1217 1159 5.14      
23 A" 1051 1001 0.49      
24 A" 833 793 0.30      
25 A" 347 331 23.79      
26 A" 247 235 3.10      
27 A" 73 69 0.44      

Unscaled Zero Point Vibrational Energy (zpe) 20242.6 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 19277.0 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 QCISD/6-31G*
ABC
0.58904 0.09658 0.08565

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 -2.179 -0.254 0.000
C2 -0.697 -0.565 0.000
O3 0.000 0.707 0.000
C4 1.342 0.618 0.000
O5 1.984 -0.409 0.000
H6 -2.756 -1.187 0.000
H7 -2.453 0.324 0.889
H8 -2.453 0.324 -0.889
H9 -0.392 -1.133 -0.886
H10 -0.392 -1.133 0.886
H11 1.776 1.629 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.51482.38213.62764.16631.09681.09551.09552.18022.18024.3808
C21.51481.45052.35672.68532.15122.15972.15971.09581.09583.3055
O32.38211.45051.34472.27683.34442.63682.63682.08002.08002.0009
C43.62762.35671.34471.21164.47773.90823.90822.61852.61851.1001
O54.16632.68532.27681.21164.80344.58404.58402.63682.63682.0486
H61.09682.15123.34444.47774.80341.77981.77982.52532.52535.3356
H71.09552.15972.63683.90824.58401.77981.77853.08592.52444.5138
H81.09552.15972.63683.90824.58401.77981.77852.52443.08594.5138
H92.18021.09582.08002.61852.63682.52533.08592.52441.77143.6212
H102.18021.09582.08002.61852.63682.52532.52443.08591.77143.6212
H114.38083.30552.00091.10012.04865.33564.51384.51383.62123.6212

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 106.878 C1 C2 H9 112.262
C1 C2 H10 112.262 C2 C1 H6 109.882
C2 C1 H7 110.631 C2 C1 H8 110.631
C2 O3 C4 114.894 O3 C2 H9 108.749
O3 C2 H10 108.749 O3 C4 O5 125.827
O3 C4 H11 109.445 O5 C4 H11 124.728
H6 C1 H7 108.554 H6 C1 H8 108.554
H7 C1 H8 108.530 H9 C2 H10 107.846
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability