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

using model chemistry: CCD/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 CCD/3-21G
 hartrees
Energy at 0K-265.874667
Energy at 298.15K-265.881795
HF Energy-265.334650
Nuclear repulsion energy174.653182
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 CCD/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' 3125 3038 19.22      
2 A' 3084 2998 58.56      
3 A' 3066 2981 11.84      
4 A' 3057 2972 11.60      
5 A' 1759 1711 172.05      
6 A' 1599 1555 7.54      
7 A' 1582 1538 4.62      
8 A' 1483 1442 8.12      
9 A' 1441 1401 2.68      
10 A' 1437 1397 14.06      
11 A' 1195 1162 367.71      
12 A' 1155 1123 31.42      
13 A' 1021 993 4.21      
14 A' 854 830 10.23      
15 A' 791 769 5.28      
16 A' 370 360 8.13      
17 A' 221 215 6.87      
18 A" 3137 3050 29.79      
19 A" 3101 3015 11.75      
20 A" 1570 1527 4.90      
21 A" 1332 1295 0.00      
22 A" 1216 1183 6.13      
23 A" 1053 1024 0.02      
24 A" 853 830 0.74      
25 A" 321 312 27.20      
26 A" 235 228 3.93      
27 A" 53 52 0.12      

Unscaled Zero Point Vibrational Energy (zpe) 20054.3 cm-1
Scaled (by 0.9723) Zero Point Vibrational Energy (zpe) 19498.8 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 CCD/3-21G
ABC
0.57127 0.09387 0.08316

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.210 -0.237 0.000
C2 -0.716 -0.591 0.000
O3 0.000 0.713 0.000
C4 1.375 0.627 0.000
O5 2.010 -0.420 0.000
H6 -2.817 -1.152 0.000
H7 -2.450 0.355 0.891
H8 -2.450 0.355 -0.891
H9 -0.426 -1.165 -0.889
H10 -0.426 -1.165 0.889
H11 1.798 1.637 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.53572.40553.68744.22381.09811.09651.09652.19872.19874.4246
C21.53571.48762.41962.73092.17462.16762.16761.09731.09733.3594
O32.40551.48761.37742.30723.37832.63182.63182.12122.12122.0217
C43.68742.41961.37741.22484.55353.93693.93692.69192.69191.0954
O54.22382.73092.30721.22484.88174.61394.61392.69812.69812.0685
H61.09812.17463.37834.55354.88171.78901.78902.55062.55065.3924
H71.09652.16762.63183.93694.61391.78901.78223.09492.53154.5262
H81.09652.16762.63183.93694.61391.78901.78222.53153.09494.5262
H92.19871.09732.12122.69192.69812.55063.09492.53151.77863.6868
H102.19871.09732.12122.69192.69812.55062.53153.09491.77863.6868
H114.42463.35942.02171.09542.06855.39244.52624.52623.68683.6868

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 105.422 C1 C2 H9 112.172
C1 C2 H10 112.172 C2 C1 H6 110.200
C2 C1 H7 109.745 C2 C1 H8 109.745
C2 O3 C4 115.187 O3 C2 H9 109.362
O3 C2 H10 109.362 O3 C4 O5 124.805
O3 C4 H11 109.156 O5 C4 H11 126.039
H6 C1 H7 109.207 H6 C1 H8 109.207
H7 C1 H8 108.711 H9 C2 H10 108.282
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability