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

using model chemistry: CCSD/6-31G(2df,p)

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/6-31G(2df,p)
 hartrees
Energy at 0K-267.804679
Energy at 298.15K-267.811944
HF Energy-266.856549
Nuclear repulsion energy178.342924
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/6-31G(2df,p)
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' 3181 3008 15.85      
2 A' 3114 2945 6.90      
3 A' 3109 2939 54.96      
4 A' 3098 2930 10.99      
5 A' 1861 1760 274.56      
6 A' 1554 1469 7.75      
7 A' 1530 1446 2.07      
8 A' 1459 1379 14.29      
9 A' 1439 1361 1.90      
10 A' 1422 1344 1.29      
11 A' 1267 1198 399.45      
12 A' 1159 1095 9.50      
13 A' 1071 1012 14.58      
14 A' 889 841 9.23      
15 A' 809 765 3.50      
16 A' 387 366 6.18      
17 A' 235 222 6.96      
18 A" 3189 3015 25.10      
19 A" 3159 2987 5.81      
20 A" 1518 1435 4.68      
21 A" 1323 1250 1.33      
22 A" 1209 1143 4.28      
23 A" 1082 1023 0.38      
24 A" 821 776 0.49      
25 A" 350 331 20.62      
26 A" 243 230 2.12      
27 A" 73 69 0.48      

Unscaled Zero Point Vibrational Energy (zpe) 20273.5 cm-1
Scaled (by 0.9455) Zero Point Vibrational Energy (zpe) 19168.6 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/6-31G(2df,p)
ABC
0.59688 0.09782 0.08677

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.169 -0.262 0.000
C2 -0.684 -0.561 0.000
O3 0.000 0.705 0.000
C4 1.331 0.616 0.000
O5 1.970 -0.399 0.000
H6 -2.736 -1.196 0.000
H7 -2.446 0.312 0.886
H8 -2.446 0.312 -0.886
H9 -0.379 -1.128 -0.882
H10 -0.379 -1.128 0.882
H11 1.760 1.625 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.51522.37483.60834.14091.09211.09141.09142.17572.17574.3586
C21.51521.43882.33312.65832.14812.15712.15711.09201.09203.2789
O32.37481.43881.33382.25763.33122.63072.63072.06922.06921.9859
C43.60832.33311.33381.19874.45193.89093.89092.59662.59661.0969
O54.14092.65832.25761.19874.77264.55924.55922.61252.61252.0348
H61.09212.14813.33124.45194.77261.77271.77272.51782.51785.3074
H71.09142.15712.63073.89094.55921.77271.77153.07792.51974.4938
H81.09142.15712.63073.89094.55921.77271.77152.51973.07794.4938
H92.17571.09202.06922.59662.61252.51783.07792.51971.76393.5964
H102.17571.09202.06922.59662.61252.51782.51973.07791.76393.5964
H114.35863.27891.98591.09692.03485.30744.49384.49383.59643.5964

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 106.985 C1 C2 H9 112.104
C1 C2 H10 112.104 C2 C1 H6 109.887
C2 C1 H7 110.640 C2 C1 H8 110.640
C2 O3 C4 114.545 O3 C2 H9 108.922
O3 C2 H10 108.922 O3 C4 O5 126.027
O3 C4 H11 109.186 O5 C4 H11 124.787
H6 C1 H7 108.558 H6 C1 H8 108.558
H7 C1 H8 108.497 H9 C2 H10 107.732
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability