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

using model chemistry: MP4=FULL/3-21G

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 MP4=FULL/3-21G
 hartrees
Energy at 0K-265.911378
Energy at 298.15K-265.918376
HF Energy-265.330705
Nuclear repulsion energy173.541280
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 MP4=FULL/3-21G
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' 3117 3051        
2 A' 3055 2991        
3 A' 3047 2982        
4 A' 3035 2971        
5 A' 1628 1594        
6 A' 1587 1553        
7 A' 1577 1543        
8 A' 1477 1446        
9 A' 1415 1385        
10 A' 1397 1367        
11 A' 1149 1124        
12 A' 1129 1105        
13 A' 1004 983        
14 A' 818 801        
15 A' 763 746        
16 A' 361 353        
17 A' 214 209        
18 A" 3133 3066        
19 A" 3095 3029        
20 A" 1567 1534        
21 A" 1319 1291        
22 A" 1201 1176        
23 A" 1019 998        
24 A" 845 827        
25 A" 331 324        
26 A" 233 228        
27 A" 16 16        

Unscaled Zero Point Vibrational Energy (zpe) 19765.5 cm-1
Scaled (by 0.9788) Zero Point Vibrational Energy (zpe) 19346.5 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 MP4=FULL/3-21G
ABC
0.55520 0.09332 0.08239

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.217 -0.222 0.000
C2 -0.724 -0.586 0.000
O3 0.000 0.732 0.000
C4 1.387 0.618 0.000
O5 2.014 -0.454 0.000
H6 -2.827 -1.136 0.000
H7 -2.455 0.370 0.892
H8 -2.455 0.370 -0.892
H9 -0.431 -1.158 -0.891
H10 -0.431 -1.158 0.891
H11 1.816 1.630 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.53672.41373.70064.23681.09901.09681.09682.20372.20374.4379
C21.53671.50392.43032.74062.17432.16962.16961.09781.09783.3709
O32.41371.50391.39152.33703.38902.63692.63692.13302.13302.0258
C43.70062.43031.39151.24244.56503.95193.95192.69302.69301.0991
O54.23682.74062.33701.24244.88884.63084.63082.69522.69522.0941
H61.09902.17433.38904.56504.88881.78981.78982.55652.55655.4050
H71.09682.16962.63693.95194.63081.78981.78303.09952.53594.5412
H81.09682.16962.63693.95194.63081.78981.78302.53593.09954.5412
H92.20371.09782.13302.69302.69522.55653.09952.53591.78113.6898
H102.20371.09782.13302.69302.69522.55652.53593.09951.78113.6898
H114.43793.37092.02581.09912.09415.40504.54124.54123.68983.6898

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 105.080 C1 C2 H9 112.471
C1 C2 H10 112.471 C2 C1 H6 110.055
C2 C1 H7 109.814 C2 C1 H8 109.814
C2 O3 C4 114.089 O3 C2 H9 109.139
O3 C2 H10 109.139 O3 C4 O5 124.975
O3 C4 H11 108.281 O5 C4 H11 126.744
H6 C1 H7 109.195 H6 C1 H8 109.195
H7 C1 H8 108.745 H9 C2 H10 108.431
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability