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

using model chemistry: CCSD(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 CCSD(T)=FULL/cc-pVDZ
 hartrees
Energy at 0K-267.706270
Energy at 298.15K-267.713474
HF Energy-266.845843
Nuclear repulsion energy176.902821
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 CCSD(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' 3151 3035        
2 A' 3074 2961        
3 A' 3072 2959        
4 A' 3061 2948        
5 A' 1817 1750        
6 A' 1512 1457        
7 A' 1491 1436        
8 A' 1430 1377        
9 A' 1399 1347        
10 A' 1384 1333        
11 A' 1223 1178        
12 A' 1139 1097        
13 A' 1056 1018        
14 A' 870 838        
15 A' 790 761        
16 A' 382 368        
17 A' 233 225        
18 A" 3159 3043        
19 A" 3122 3007        
20 A" 1478 1423        
21 A" 1293 1245        
22 A" 1181 1138        
23 A" 1040 1002        
24 A" 807 778        
25 A" 345 332        
26 A" 243 234        
27 A" 65 63        

Unscaled Zero Point Vibrational Energy (zpe) 19908.5 cm-1
Scaled (by 0.9632) Zero Point Vibrational Energy (zpe) 19175.9 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 CCSD(T)=FULL/cc-pVDZ
ABC
0.58251 0.09670 0.08565

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.181 -0.256 0.000
C2 -0.691 -0.558 0.000
O3 0.000 0.716 0.000
C4 1.345 0.614 0.000
O5 1.978 -0.418 0.000
H6 -2.755 -1.200 0.000
H7 -2.460 0.325 0.896
H8 -2.460 0.325 -0.896
H9 -0.385 -1.134 -0.892
H10 -0.385 -1.134 0.892
H11 1.783 1.634 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.52012.38783.63184.16191.10481.10401.10402.18922.18924.3915
C21.52011.44962.34942.67262.16172.17042.17041.10511.10513.3057
O32.38781.44961.34912.27993.35602.64672.64672.08992.08992.0054
C43.63182.34941.34911.21024.48373.91953.91952.61612.61611.1106
O54.16192.67262.27991.21024.79734.58754.58752.62502.62502.0616
H61.10482.16173.35604.48374.79731.79361.79362.53352.53355.3505
H71.10402.17042.64673.91954.58751.79361.79253.10352.53674.5293
H81.10402.17042.64673.91954.58751.79361.79252.53673.10354.5293
H92.18921.10512.08992.61612.62502.53353.10352.53671.78343.6277
H102.18921.10512.08992.61612.62502.53352.53673.10351.78343.6277
H114.39153.30572.00541.11062.06165.35054.52934.52933.62773.6277

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 107.019 C1 C2 H9 112.043
C1 C2 H10 112.043 C2 C1 H6 109.868
C2 C1 H7 110.604 C2 C1 H8 110.604
C2 O3 C4 114.121 O3 C2 H9 109.042
O3 C2 H10 109.042 O3 C4 O5 125.872
O3 C4 H11 108.852 O5 C4 H11 125.275
H6 C1 H7 108.582 H6 C1 H8 108.582
H7 C1 H8 108.542 H9 C2 H10 107.595
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability