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

using model chemistry: MP2/6-31G**

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 MP2/6-31G**
 hartrees
Energy at 0K-267.614998
Energy at 298.15K-267.622259
HF Energy-266.835217
Nuclear repulsion energy177.433644
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 MP2/6-31G**
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' 3240 3034 16.15      
2 A' 3157 2956 52.32      
3 A' 3152 2952 23.63      
4 A' 3143 2943 11.89      
5 A' 1812 1696 243.86      
6 A' 1575 1475 5.90      
7 A' 1558 1459 2.24      
8 A' 1478 1384 17.57      
9 A' 1434 1343 0.83      
10 A' 1430 1339 7.82      
11 A' 1247 1167 403.91      
12 A' 1170 1096 6.96      
13 A' 1072 1004 14.08      
14 A' 884 828 11.72      
15 A' 795 745 3.85      
16 A' 388 363 5.93      
17 A' 234 219 6.91      
18 A" 3252 3045 23.76      
19 A" 3211 3007 12.69      
20 A" 1547 1449 4.72      
21 A" 1330 1245 0.66      
22 A" 1219 1141 4.95      
23 A" 1050 983 0.20      
24 A" 834 781 0.28      
25 A" 356 333 20.95      
26 A" 253 237 2.76      
27 A" 68 64 0.41      

Unscaled Zero Point Vibrational Energy (zpe) 20443.6 cm-1
Scaled (by 0.9365) Zero Point Vibrational Energy (zpe) 19145.4 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 MP2/6-31G**
ABC
0.58702 0.09708 0.08597

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.175 -0.244 0.000
C2 -0.698 -0.558 0.000
O3 0.000 0.713 0.000
C4 1.343 0.610 0.000
O5 1.978 -0.426 0.000
H6 -2.748 -1.170 0.000
H7 -2.443 0.330 0.884
H8 -2.443 0.330 -0.884
H9 -0.396 -1.124 -0.880
H10 -0.396 -1.124 0.880
H11 1.778 1.615 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.50942.37593.61994.15681.08901.08761.08762.17102.17104.3675
C21.50941.44972.35162.67952.13952.14812.14811.08961.08963.2936
O32.37591.44971.34702.28273.33132.62602.62602.07492.07491.9932
C43.61992.35161.34701.21544.46173.89803.89802.60872.60871.0943
O54.15682.67952.28271.21544.78454.57184.57182.62632.62632.0504
H61.08902.13953.33134.46174.78451.76771.76772.51222.51225.3138
H71.08762.14812.62603.89804.57181.76771.76713.06892.51134.4994
H81.08762.14812.62603.89804.57181.76771.76712.51133.06894.4994
H92.17101.08962.07492.60872.62632.51223.06892.51131.76093.6052
H102.17101.08962.07492.60872.62632.51222.51133.06891.76093.6052
H114.36753.29361.99321.09432.05045.31384.49944.49943.60523.6052

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 106.804 C1 C2 H9 112.294
C1 C2 H10 112.294 C2 C1 H6 109.796
C2 C1 H7 110.561 C2 C1 H8 110.561
C2 O3 C4 114.415 O3 C2 H9 108.769
O3 C2 H10 108.769 O3 C4 O5 125.877
O3 C4 H11 109.026 O5 C4 H11 125.097
H6 C1 H7 108.608 H6 C1 H8 108.608
H7 C1 H8 108.653 H9 C2 H10 107.818
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability