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

using model chemistry: PBEPBE/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 PBEPBE/3-21G
 hartrees
Energy at 0K-266.587953
Energy at 298.15K-266.594871
HF Energy-266.587953
Nuclear repulsion energy174.092010
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 PBEPBE/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' 3076 3048 15.59      
2 A' 3005 2977 9.45      
3 A' 3001 2974 10.75      
4 A' 2970 2943 72.06      
5 A' 1677 1662 162.44      
6 A' 1526 1513 9.76      
7 A' 1512 1498 6.25      
8 A' 1415 1402 12.32      
9 A' 1349 1336 4.76      
10 A' 1344 1331 8.67      
11 A' 1110 1100 49.12      
12 A' 1098 1088 245.18      
13 A' 999 990 20.30      
14 A' 804 796 5.24      
15 A' 753 746 2.20      
16 A' 354 351 8.28      
17 A' 211 209 6.18      
18 A" 3088 3060 24.48      
19 A" 3046 3018 8.61      
20 A" 1506 1492 8.29      
21 A" 1266 1254 0.04      
22 A" 1143 1133 5.89      
23 A" 991 982 1.03      
24 A" 815 808 3.20      
25 A" 344 340 21.33      
26 A" 221 219 1.47      
27 A" 10 10 0.33      

Unscaled Zero Point Vibrational Energy (zpe) 19316.2 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 19140.5 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 PBEPBE/3-21G
ABC
0.55512 0.09424 0.08313

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.205 -0.235 0.000
C2 -0.719 -0.583 0.000
O3 0.000 0.737 0.000
C4 1.380 0.618 0.000
O5 2.002 -0.448 0.000
H6 -2.809 -1.158 0.000
H7 -2.455 0.357 0.895
H8 -2.455 0.357 -0.895
H9 -0.415 -1.153 -0.894
H10 -0.415 -1.153 0.894
H11 1.802 1.640 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.52622.40953.68474.21211.10351.10221.10222.20152.20154.4236
C21.52621.50272.41802.72402.16812.16802.16801.10321.10323.3608
O32.40951.50271.38492.32613.38862.64082.64082.13172.13172.0155
C43.68472.41801.38491.23414.55013.94683.94682.67542.67541.1058
O54.21212.72402.32611.23414.86324.61684.61682.67152.67152.0977
H61.10352.16813.38864.55014.86321.79531.79532.55582.55585.3936
H71.10222.16802.64083.94684.61681.79531.79063.10582.53874.5353
H81.10222.16802.64083.94684.61681.79531.79062.53873.10584.5353
H92.20151.10322.13172.67542.67152.55583.10582.53871.78783.6765
H102.20151.10322.13172.67542.67152.55582.53873.10581.78783.6765
H114.42363.36082.01551.10582.09775.39364.53534.53533.67653.6765

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 105.400 C1 C2 H9 112.719
C1 C2 H10 112.719 C2 C1 H6 110.032
C2 C1 H7 110.100 C2 C1 H8 110.100
C2 O3 C4 113.660 O3 C2 H9 108.805
O3 C2 H10 108.805 O3 C4 O5 125.184
O3 C4 H11 107.505 O5 C4 H11 127.311
H6 C1 H7 108.966 H6 C1 H8 108.966
H7 C1 H8 108.642 H9 C2 H10 108.251
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.622      
2 C -0.218      
3 O -0.428      
4 C 0.367      
5 O -0.429      
6 H 0.211      
7 H 0.225      
8 H 0.225      
9 H 0.232      
10 H 0.232      
11 H 0.206      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.797 0.298 0.000 1.821
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.921 4.651 0.000
y 4.651 -29.425 0.000
z 0.000 0.000 -29.217
Traceless
 xyz
x -2.600 4.651 0.000
y 4.651 1.144 0.000
z 0.000 0.000 1.456
Polar
3z2-r22.912
x2-y2-2.496
xy4.651
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.968 0.394 0.000
y 0.394 5.384 0.000
z 0.000 0.000 3.795


<r2> (average value of r2) Å2
<r2> 138.901
(<r2>)1/2 11.786