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

using model chemistry: CCSD(T)=FULL/TZVP

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/TZVP
 hartrees
Energy at 0K-267.906845
Energy at 298.15K-267.914027
HF Energy-266.920493
Nuclear repulsion energy177.533297
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/TZVP
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' 3136 2998        
2 A' 3088 2952        
3 A' 3076 2941        
4 A' 3057 2922        
5 A' 1790 1711        
6 A' 1535 1468        
7 A' 1516 1449        
8 A' 1454 1390        
9 A' 1435 1372        
10 A' 1416 1353        
11 A' 1224 1170        
12 A' 1150 1099        
13 A' 1051 1004        
14 A' 874 836        
15 A' 794 759        
16 A' 386 369        
17 A' 234 224        
18 A" 3149 3011        
19 A" 3121 2983        
20 A" 1496 1430        
21 A" 1308 1251        
22 A" 1200 1147        
23 A" 1034 989        
24 A" 824 788        
25 A" 334 319        
26 A" 234 224        
27 A" 55 52        

Unscaled Zero Point Vibrational Energy (zpe) 19984.2 cm-1
Scaled (by 0.956) Zero Point Vibrational Energy (zpe) 19104.9 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/TZVP
ABC
0.59221 0.09676 0.08585

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.178 -0.267 0.000
C2 -0.693 -0.563 0.000
O3 0.000 0.709 0.000
C4 1.340 0.621 0.000
O5 1.981 -0.400 0.000
H6 -2.737 -1.205 0.000
H7 -2.456 0.304 0.888
H8 -2.456 0.304 -0.888
H9 -0.390 -1.128 -0.884
H10 -0.390 -1.128 0.884
H11 1.769 1.630 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.51372.38633.62824.16121.09281.09151.09152.17222.17224.3786
C21.51371.44842.35322.67972.14232.15562.15561.09211.09213.2971
O32.38631.44841.34282.27033.34002.64302.64302.07532.07531.9942
C43.62822.35321.34281.20604.46773.91163.91162.61442.61441.0959
O54.16122.67972.27031.20604.78664.57984.57982.63362.63362.0411
H61.09282.14233.34004.46774.78661.77351.77352.50902.50905.3237
H71.09152.15562.64303.91164.57981.77351.77593.07532.51344.5163
H81.09152.15562.64303.91164.57981.77351.77592.51343.07534.5163
H92.17221.09212.07532.61442.63362.50903.07532.51341.76823.6122
H102.17221.09212.07532.61442.63362.50902.51343.07531.76823.6122
H114.37863.29711.99421.09592.04115.32374.51634.51633.61223.6122

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 107.322 C1 C2 H9 111.928
C1 C2 H10 111.928 C2 C1 H6 109.496
C2 C1 H7 110.632 C2 C1 H8 110.632
C2 O3 C4 114.880 O3 C2 H9 108.737
O3 C2 H10 108.737 O3 C4 O5 125.850
O3 C4 H11 109.298 O5 C4 H11 124.851
H6 C1 H7 108.572 H6 C1 H8 108.572
H7 C1 H8 108.883 H9 C2 H10 108.105
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability