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

using model chemistry: QCISD(T)=FULL/aug-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/aug-cc-pVDZ
 hartrees
Energy at 0K-267.770759
Energy at 298.15K-267.777902
HF Energy-266.861924
Nuclear repulsion energy176.180726
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/aug-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' 3120 3027        
2 A' 3081 2989        
3 A' 3060 2969        
4 A' 3036 2945        
5 A' 1744 1692        
6 A' 1497 1453        
7 A' 1480 1436        
8 A' 1412 1370        
9 A' 1375 1334        
10 A' 1371 1330        
11 A' 1187 1152        
12 A' 1127 1093        
13 A' 1036 1005        
14 A' 848 822        
15 A' 771 748        
16 A' 374 363        
17 A' 227 220        
18 A" 3131 3038        
19 A" 3107 3014        
20 A" 1469 1425        
21 A" 1281 1243        
22 A" 1168 1133        
23 A" 1020 989        
24 A" 802 779        
25 A" 336 326        
26 A" 233 226        
27 A" 67 65        

Unscaled Zero Point Vibrational Energy (zpe) 19679.7 cm-1
Scaled (by 0.9701) Zero Point Vibrational Energy (zpe) 19091.3 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/aug-cc-pVDZ
ABC
0.57822 0.09577 0.08484

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.190 -0.260 0.000
C2 -0.698 -0.565 0.000
O3 0.000 0.720 0.000
C4 1.350 0.621 0.000
O5 1.989 -0.416 0.000
H6 -2.758 -1.207 0.000
H7 -2.470 0.318 0.897
H8 -2.470 0.318 -0.897
H9 -0.386 -1.131 -0.894
H10 -0.386 -1.131 0.894
H11 1.793 1.635 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.52262.39943.64844.18161.10401.10301.10302.19342.19344.4109
C21.52261.46242.36712.69112.15712.17342.17341.10301.10303.3236
O32.39941.46241.35392.29013.36432.65872.65872.09132.09132.0129
C43.64842.36711.35391.21774.49633.93623.93622.62372.62371.1064
O54.18162.69112.29011.21774.81174.60714.60712.63622.63622.0604
H61.10402.15713.36434.49634.81171.79221.79222.53542.53545.3652
H71.10302.17342.65873.93624.60711.79221.79323.10622.53844.5513
H81.10302.17342.65873.93624.60711.79221.79322.53843.10624.5513
H92.19341.10302.09132.62372.63622.53543.10622.53841.78753.6329
H102.19341.10302.09132.62372.63622.53542.53843.10621.78753.6329
H114.41093.32362.01291.10642.06045.36524.55134.55133.63293.6329

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 106.982 C1 C2 H9 112.334
C1 C2 H10 112.334 C2 C1 H6 109.387
C2 C1 H7 110.726 C2 C1 H8 110.726
C2 O3 C4 114.339 O3 C2 H9 108.405
O3 C2 H10 108.405 O3 C4 O5 125.804
O3 C4 H11 109.388 O5 C4 H11 124.809
H6 C1 H7 108.595 H6 C1 H8 108.595
H7 C1 H8 108.756 H9 C2 H10 108.245
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability