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

using model chemistry: QCISD(T)=FULL/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-267.715208
Energy at 298.15K-267.722369
HF Energy-266.841899
Nuclear repulsion energy176.898792
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/6-31+G**
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' 3180 3180        
2 A' 3135 3135        
3 A' 3116 3116        
4 A' 3094 3094        
5 A' 1779 1779        
6 A' 1555 1555        
7 A' 1536 1536        
8 A' 1466 1466        
9 A' 1421 1421        
10 A' 1416 1416        
11 A' 1224 1224        
12 A' 1155 1155        
13 A' 1053 1053        
14 A' 866 866        
15 A' 782 782        
16 A' 383 383        
17 A' 228 228        
18 A" 3195 3195        
19 A" 3167 3167        
20 A" 1524 1524        
21 A" 1311 1311        
22 A" 1202 1202        
23 A" 1034 1034        
24 A" 824 824        
25 A" 339 339        
26 A" 239 239        
27 A" 53 53        

Unscaled Zero Point Vibrational Energy (zpe) 20138.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 20138.7 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/6-31+G**
ABC
0.58717 0.09615 0.08526

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.183 -0.254 0.000
C2 -0.702 -0.566 0.000
O3 0.000 0.710 0.000
C4 1.346 0.620 0.000
O5 1.990 -0.413 0.000
H6 -2.752 -1.185 0.000
H7 -2.455 0.320 0.886
H8 -2.455 0.320 -0.886
H9 -0.397 -1.127 -0.884
H10 -0.397 -1.127 0.884
H11 1.778 1.625 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.51382.38663.63544.17631.09161.09021.09022.17632.17634.3839
C21.51381.45642.36612.69632.14182.15502.15501.09081.09083.3089
O32.38661.45641.34862.28493.34192.63952.63952.07702.07701.9992
C43.63542.36611.34861.21714.47783.91443.91442.62062.62061.0943
O54.17632.69632.28491.21714.80474.59164.59162.64342.64342.0490
H61.09162.14183.34194.47784.80471.77181.77182.51682.51685.3308
H71.09022.15502.63953.91444.59161.77181.77283.07672.51614.5174
H81.09022.15502.63953.91444.59161.77181.77282.51613.07674.5174
H92.17631.09082.07702.62062.64342.51683.07672.51611.76853.6169
H102.17631.09082.07702.62062.64342.51682.51613.07671.76853.6169
H114.38393.30891.99921.09432.04905.33084.51744.51743.61693.6169

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 106.923 C1 C2 H9 112.333
C1 C2 H10 112.333 C2 C1 H6 109.511
C2 C1 H7 110.646 C2 C1 H8 110.646
C2 O3 C4 114.976 O3 C2 H9 108.400
O3 C2 H10 108.400 O3 C4 O5 125.810
O3 C4 H11 109.406 O5 C4 H11 124.783
H6 C1 H7 108.597 H6 C1 H8 108.597
H7 C1 H8 108.790 H9 C2 H10 108.311
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability