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

using model chemistry: MP2=FULL/aug-cc-pVTZ

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 MP2=FULL/aug-cc-pVTZ
 hartrees
Energy at 0K-268.010410
Energy at 298.15K-268.017677
HF Energy-266.933128
Nuclear repulsion energy178.567452
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 MP2=FULL/aug-cc-pVTZ
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' 3174 3020 12.18      
2 A' 3109 2958 8.06      
3 A' 3103 2952 47.66      
4 A' 3093 2943 10.96      
5 A' 1779 1692 308.59      
6 A' 1542 1467 8.60      
7 A' 1527 1453 2.62      
8 A' 1443 1373 16.92      
9 A' 1408 1340 0.08      
10 A' 1404 1335 4.01      
11 A' 1236 1176 412.13      
12 A' 1153 1097 6.58      
13 A' 1062 1010 18.40      
14 A' 873 830 11.66      
15 A' 793 754 2.48      
16 A' 385 367 5.16      
17 A' 232 220 7.20      
18 A" 3182 3028 19.86      
19 A" 3151 2998 4.39      
20 A" 1516 1443 6.71      
21 A" 1324 1260 1.41      
22 A" 1199 1141 3.82      
23 A" 1070 1018 0.09      
24 A" 823 783 0.65      
25 A" 355 338 20.58      
26 A" 243 232 1.96      
27 A" 76 72 0.57      

Unscaled Zero Point Vibrational Energy (zpe) 20127.0 cm-1
Scaled (by 0.9514) Zero Point Vibrational Energy (zpe) 19148.8 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 MP2=FULL/aug-cc-pVTZ
ABC
0.59535 0.09824 0.08705

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.162 -0.259 0.000
C2 -0.690 -0.557 0.000
O3 0.000 0.708 0.000
C4 1.332 0.614 0.000
O5 1.966 -0.409 0.000
H6 -2.722 -1.190 0.000
H7 -2.437 0.311 0.883
H8 -2.437 0.311 -0.883
H9 -0.385 -1.116 -0.880
H10 -0.385 -1.116 0.880
H11 1.761 1.617 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.50122.36803.60074.13011.08691.08591.08592.16042.16044.3483
C21.50121.44082.33642.66012.12802.14062.14061.08681.08683.2763
O32.36801.44081.33482.26103.31842.62202.62202.06152.06151.9820
C43.60072.33641.33481.20404.43693.88223.88222.59112.59111.0906
O54.13012.66012.26101.20404.75214.54754.54752.60742.60742.0360
H61.08692.12803.31844.43694.75211.76461.76462.49852.49855.2894
H71.08592.14062.62203.88224.54751.76461.76503.05862.49964.4844
H81.08592.14062.62203.88224.54751.76461.76502.49963.05864.4844
H92.16041.08682.06152.59112.60742.49853.05862.49961.76043.5844
H102.16041.08682.06152.59112.60742.49852.49963.05861.76043.5844
H114.34833.27631.98201.09062.03605.28944.48444.48443.58443.5844

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 107.183 C1 C2 H9 112.198
C1 C2 H10 112.198 C2 C1 H6 109.572
C2 C1 H7 110.640 C2 C1 H8 110.640
C2 O3 C4 114.597 O3 C2 H9 108.485
O3 C2 H10 108.485 O3 C4 O5 125.813
O3 C4 H11 109.186 O5 C4 H11 125.001
H6 C1 H7 108.608 H6 C1 H8 108.608
H7 C1 H8 108.719 H9 C2 H10 108.173
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability