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

using model chemistry: QCISD(T)=FULL/cc-pVDZ

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(T)=FULL/cc-pVDZ
 hartrees
Energy at 0K-267.707354
Energy at 298.15K-267.714553
HF Energy-266.845680
Nuclear repulsion energy176.843447
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(T)=FULL/cc-pVDZ
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' 3150 3021        
2 A' 3073 2947        
3 A' 3070 2944        
4 A' 3060 2934        
5 A' 1812 1738        
6 A' 1512 1450        
7 A' 1491 1429        
8 A' 1429 1371        
9 A' 1396 1339        
10 A' 1383 1326        
11 A' 1218 1168        
12 A' 1138 1091        
13 A' 1055 1012        
14 A' 868 833        
15 A' 788 756        
16 A' 382 366        
17 A' 233 223        
18 A" 3159 3029        
19 A" 3121 2993        
20 A" 1478 1417        
21 A" 1292 1239        
22 A" 1181 1132        
23 A" 1038 995        
24 A" 807 774        
25 A" 345 331        
26 A" 244 234        
27 A" 64 62        

Unscaled Zero Point Vibrational Energy (zpe) 19892.5 cm-1
Scaled (by 0.959) Zero Point Vibrational Energy (zpe) 19076.9 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(T)=FULL/cc-pVDZ
ABC
0.58193 0.09665 0.08560

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.181 -0.255 0.000
C2 -0.692 -0.558 0.000
O3 0.000 0.717 0.000
C4 1.346 0.613 0.000
O5 1.978 -0.420 0.000
H6 -2.756 -1.199 0.000
H7 -2.460 0.327 0.896
H8 -2.460 0.327 -0.896
H9 -0.385 -1.134 -0.892
H10 -0.385 -1.134 0.892
H11 1.784 1.634 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.52012.38813.63284.16301.10491.10411.10412.18952.18954.3924
C21.52011.45012.35032.67362.16162.17052.17051.10511.10513.3064
O32.38811.45011.35012.28143.35642.64692.64692.09032.09032.0059
C43.63282.35031.35011.21084.48463.92053.92052.61652.61651.1107
O54.16302.67362.28141.21084.79824.58874.58872.62542.62542.0626
H61.10492.16163.35644.48464.79821.79371.79372.53382.53385.3513
H71.10412.17052.64693.92054.58871.79371.79253.10382.53704.5301
H81.10412.17052.64693.92054.58871.79371.79252.53703.10384.5301
H92.18951.10512.09032.61652.62542.53383.10382.53701.78363.6281
H102.18951.10512.09032.61652.62542.53382.53703.10381.78363.6281
H114.39243.30642.00591.11072.06265.35134.53014.53013.62813.6281

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 107.007 C1 C2 H9 112.055
C1 C2 H10 112.055 C2 C1 H6 109.861
C2 C1 H7 110.603 C2 C1 H8 110.603
C2 O3 C4 114.089 O3 C2 H9 109.032
O3 C2 H10 109.032 O3 C4 O5 125.878
O3 C4 H11 108.814 O5 C4 H11 125.308
H6 C1 H7 108.587 H6 C1 H8 108.587
H7 C1 H8 108.542 H9 C2 H10 107.600
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability