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

using model chemistry: CCSD/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/TZVP
 hartrees
Energy at 0K-267.785978
Energy at 298.15K-267.793224
HF Energy-266.921539
Nuclear repulsion energy177.930199
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/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' 3154 3010 24.92      
2 A' 3118 2976 51.13      
3 A' 3098 2957 16.25      
4 A' 3076 2936 15.68      
5 A' 1832 1748 323.00      
6 A' 1550 1480 7.97      
7 A' 1529 1459 2.49      
8 A' 1470 1403 17.96      
9 A' 1455 1388 2.10      
10 A' 1430 1365 2.16      
11 A' 1252 1194 442.87      
12 A' 1162 1109 6.57      
13 A' 1064 1015 14.23      
14 A' 889 848 14.93      
15 A' 807 770 2.38      
16 A' 391 373 5.49      
17 A' 237 226 7.06      
18 A" 3166 3022 40.71      
19 A" 3140 2997 3.35      
20 A" 1508 1439 4.90      
21 A" 1323 1263 1.67      
22 A" 1212 1157 4.11      
23 A" 1059 1011 0.20      
24 A" 832 794 0.02      
25 A" 334 319 23.76      
26 A" 239 228 2.60      
27 A" 67 64 0.55      

Unscaled Zero Point Vibrational Energy (zpe) 20195.8 cm-1
Scaled (by 0.9544) Zero Point Vibrational Energy (zpe) 19274.9 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/TZVP
ABC
0.59839 0.09694 0.08612

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.175 -0.270 0.000
C2 -0.692 -0.565 0.000
O3 0.000 0.702 0.000
C4 1.335 0.624 0.000
O5 1.981 -0.388 0.000
H6 -2.733 -1.208 0.000
H7 -2.455 0.300 0.887
H8 -2.455 0.300 -0.887
H9 -0.389 -1.131 -0.883
H10 -0.389 -1.131 0.883
H11 1.760 1.633 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.51262.38223.62244.15771.09191.09071.09072.17002.17004.3705
C21.51261.44352.35022.67852.14062.15492.15491.09111.09113.2925
O32.38221.44351.33762.26103.33462.64062.64062.07082.07081.9908
C43.62242.35021.33761.20074.46233.90583.90582.61402.61401.0943
O54.15772.67852.26101.20074.78524.57544.57542.63612.63612.0332
H61.09192.14063.33464.46234.78521.77191.77192.50612.50615.3159
H71.09072.15492.64063.90584.57541.77191.77383.07322.51234.5079
H81.09072.15492.64063.90584.57541.77191.77382.51233.07324.5079
H92.17001.09112.07082.61402.63612.50613.07322.51231.76613.6102
H102.17001.09112.07082.61402.63612.50612.51233.07321.76613.6102
H114.37053.29251.99081.09432.03325.31594.50794.50793.61023.6102

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 107.362 C1 C2 H9 111.893
C1 C2 H10 111.893 C2 C1 H6 109.495
C2 C1 H7 110.698 C2 C1 H8 110.698
C2 O3 C4 115.301 O3 C2 H9 108.777
O3 C2 H10 108.777 O3 C4 O5 125.854
O3 C4 H11 109.481 O5 C4 H11 124.666
H6 C1 H7 108.544 H6 C1 H8 108.544
H7 C1 H8 108.806 H9 C2 H10 108.058
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability