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

using model chemistry: MP2/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 MP2/TZVP
 hartrees
Energy at 0K-267.753791
Energy at 298.15K-267.761023
HF Energy-266.920581
Nuclear repulsion energy177.754620
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/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' 3189 3023 17.24      
2 A' 3121 2959 46.55      
3 A' 3114 2952 20.65      
4 A' 3098 2937 13.13      
5 A' 1783 1690 293.91      
6 A' 1544 1464 9.05      
7 A' 1526 1447 2.81      
8 A' 1458 1382 18.56      
9 A' 1440 1365 3.69      
10 A' 1420 1346 2.60      
11 A' 1230 1166 431.51      
12 A' 1157 1097 5.92      
13 A' 1060 1004 15.24      
14 A' 880 834 14.33      
15 A' 798 757 2.16      
16 A' 388 367 5.12      
17 A' 234 222 6.65      
18 A" 3202 3035 26.93      
19 A" 3168 3003 7.27      
20 A" 1505 1427 6.01      
21 A" 1318 1249 1.45      
22 A" 1206 1143 4.17      
23 A" 1044 990 0.00      
24 A" 831 788 0.15      
25 A" 342 324 21.92      
26 A" 242 230 2.43      
27 A" 62 59 0.53      

Unscaled Zero Point Vibrational Energy (zpe) 20181.1 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 19129.7 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 MP2/TZVP
ABC
0.59340 0.09705 0.08609

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.173 -0.259 0.000
C2 -0.696 -0.560 0.000
O3 0.000 0.707 0.000
C4 1.339 0.617 0.000
O5 1.980 -0.406 0.000
H6 -2.735 -1.194 0.000
H7 -2.450 0.311 0.886
H8 -2.450 0.311 -0.886
H9 -0.394 -1.125 -0.882
H10 -0.394 -1.125 0.882
H11 1.766 1.625 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.50822.37873.62014.15581.09011.08881.08882.16672.16674.3667
C21.50821.44602.35092.67992.13552.14952.14951.09001.09003.2917
O32.37871.44601.34192.27133.33072.63512.63512.07152.07151.9901
C43.62012.35091.34191.20744.45843.90303.90302.61102.61101.0945
O54.15582.67992.27131.20744.78024.57384.57382.63252.63252.0423
H61.09012.13553.33074.45844.78021.76861.76862.50282.50285.3106
H71.08882.14952.63513.90304.57381.76861.77133.06812.50764.5038
H81.08882.14952.63513.90304.57381.76861.77132.50763.06814.5038
H92.16671.09002.07152.61102.63252.50283.06812.50761.76443.6065
H102.16671.09002.07152.61102.63252.50282.50763.06811.76443.6065
H114.36673.29171.99011.09452.04235.31064.50384.50383.60653.6065

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 107.236 C1 C2 H9 112.005
C1 C2 H10 112.005 C2 C1 H6 109.490
C2 C1 H7 110.690 C2 C1 H8 110.690
C2 O3 C4 114.916 O3 C2 H9 108.722
O3 C2 H10 108.722 O3 C4 O5 125.901
O3 C4 H11 109.114 O5 C4 H11 124.985
H6 C1 H7 108.524 H6 C1 H8 108.524
H7 C1 H8 108.865 H9 C2 H10 108.063
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability