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

using model chemistry: QCISD/6-31G

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/6-31G
 hartrees
Energy at 0K-267.251714
Energy at 298.15K-267.258781
HF Energy-266.690713
Nuclear repulsion energy173.314984
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/6-31G
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' 3113 3000 44.46      
2 A' 3098 2985 26.33      
3 A' 3046 2935 10.43      
4 A' 3023 2913 16.74      
5 A' 1664 1604 208.07      
6 A' 1565 1508 8.84      
7 A' 1549 1493 4.64      
8 A' 1476 1422 9.35      
9 A' 1425 1374 16.20      
10 A' 1400 1349 9.84      
11 A' 1158 1116 288.91      
12 A' 1153 1111 109.57      
13 A' 1036 998 8.07      
14 A' 816 786 14.94      
15 A' 760 732 1.44      
16 A' 370 357 6.76      
17 A' 216 208 7.90      
18 A" 3117 3004 41.17      
19 A" 3089 2976 6.22      
20 A" 1538 1482 5.40      
21 A" 1309 1262 0.03      
22 A" 1201 1157 6.79      
23 A" 1006 969 0.04      
24 A" 840 810 0.35      
25 A" 322 310 33.58      
26 A" 231 223 4.19      
27 A" 55 53 0.37      

Unscaled Zero Point Vibrational Energy (zpe) 19788.5 cm-1
Scaled (by 0.9636) Zero Point Vibrational Energy (zpe) 19068.2 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/6-31G
ABC
0.57133 0.09165 0.08143

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.226 -0.245 0.000
C2 -0.738 -0.598 0.000
O3 0.000 0.706 0.000
C4 1.380 0.640 0.000
O5 2.046 -0.409 0.000
H6 -2.830 -1.169 0.000
H7 -2.482 0.344 0.894
H8 -2.482 0.344 -0.894
H9 -0.435 -1.166 -0.893
H10 -0.435 -1.166 0.893
H11 1.802 1.654 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.52962.42123.71394.27501.10291.10071.10072.20292.20294.4531
C21.52961.49842.45352.78982.16852.17472.17471.10081.10083.3938
O32.42121.49841.38212.33003.39462.66322.66322.11962.11962.0354
C43.71392.45351.38211.24244.58243.97603.97602.71222.71221.0975
O54.27502.78982.33001.24244.93424.67654.67652.74302.74302.0773
H61.10292.16853.39464.58244.93421.79071.79072.55582.55585.4235
H71.10072.17472.66323.97604.67651.79071.78723.10862.54394.5680
H81.10072.17472.66323.97604.67651.79071.78722.54393.10864.5680
H92.20291.10082.11962.71222.74302.55583.10862.54391.78583.7082
H102.20291.10082.11962.71222.74302.55582.54393.10861.78583.7082
H114.45313.39382.03541.09752.07735.42354.56804.56803.70823.7082

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 106.176 C1 C2 H9 112.734
C1 C2 H10 112.734 C2 C1 H6 109.860
C2 C1 H7 110.481 C2 C1 H8 110.481
C2 O3 C4 116.750 O3 C2 H9 108.294
O3 C2 H10 108.294 O3 C4 O5 125.114
O3 C4 H11 109.813 O5 C4 H11 125.073
H6 C1 H7 108.709 H6 C1 H8 108.709
H7 C1 H8 108.553 H9 C2 H10 108.420
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability