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All results from a given calculation for C5H8O (Cyclopentanone)

using model chemistry: HF/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at HF/3-21G*
 hartrees
Energy at 0K-267.368098
Energy at 298.15K-267.378015
HF Energy-267.368098
Nuclear repulsion energy235.425277
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 HF/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 3288 2967 6.83      
2 A 3281 2962 16.45      
3 A 3222 2909 17.86      
4 A 3213 2900 6.40      
5 A 1958 1767 194.93      
6 A 1663 1501 2.13      
7 A 1610 1453 0.82      
8 A 1481 1337 0.33      
9 A 1452 1310 4.23      
10 A 1356 1224 0.03      
11 A 1290 1164 0.77      
12 A 1097 990 0.86      
13 A 1083 977 0.00      
14 A 932 841 0.63      
15 A 868 783 0.01      
16 A 757 684 0.22      
17 A 610 551 6.39      
18 A 248 223 0.03      
19 B 3293 2972 29.38      
20 B 3282 2963 18.59      
21 B 3227 2912 31.57      
22 B 3211 2899 7.03      
23 B 1652 1491 7.78      
24 B 1609 1453 26.13      
25 B 1487 1342 0.26      
26 B 1453 1311 0.92      
27 B 1391 1256 0.15      
28 B 1317 1189 0.61      
29 B 1217 1098 77.48      
30 B 1039 938 11.18      
31 B 1007 909 12.96      
32 B 915 826 11.12      
33 B 633 572 3.78      
34 B 510 461 1.39      
35 B 480 433 11.29      
36 B 95 85 5.74      

Unscaled Zero Point Vibrational Energy (zpe) 28612.0 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 25825.2 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 HF/3-21G*
ABC
0.22078 0.11155 0.08011

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 2.132
C2 0.000 0.000 0.925
C3 0.000 1.242 0.032
C4 0.000 -1.242 0.032
C5 0.312 0.711 -1.380
C6 -0.312 -0.711 -1.380
H7 -0.995 1.677 0.063
H8 0.995 -1.677 0.063
H9 0.701 1.978 0.401
H10 -0.701 -1.978 0.401
H11 -0.092 1.340 -2.161
H12 0.092 -1.340 -2.161
H13 1.384 0.634 -1.518
H14 -1.384 -0.634 -1.518

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
O11.20672.43942.43943.59663.59662.84292.84292.72012.72014.49774.49773.95493.9549
C21.20671.52981.52982.43242.43242.13212.13212.16312.16313.36543.36542.87902.8790
C32.43941.52982.48461.54102.43051.08663.08441.08103.31642.19713.38912.16572.8005
C42.43941.52982.48462.43051.54103.08441.08663.31641.08103.38912.19712.80052.1657
C53.59662.43241.54102.43051.55252.17372.87272.22043.38071.08062.20541.08422.1693
C63.59662.43242.43051.54101.55252.87272.17373.38072.22042.20541.08062.16931.0842
H72.84292.13211.08663.08442.17372.87273.90021.75563.68252.42403.90243.04152.8275
H82.84292.13213.08441.08662.87272.17373.90023.68251.75563.90242.42402.82753.0415
H92.72012.16311.08103.31642.22043.38071.75563.68254.19732.75654.23612.44073.8546
H102.72012.16313.31641.08103.38072.22043.68251.75564.19734.23612.75653.85462.4407
H114.49773.36542.19713.38911.08062.20542.42403.90242.75654.23612.68621.75752.4459
H124.49773.36543.38912.19712.20541.08063.90242.42404.23612.75652.68622.44591.7575
H133.95492.87902.16572.80051.08422.16933.04152.82752.44073.85461.75752.44593.0456
H143.95492.87902.80052.16572.16931.08422.82753.04153.85462.44072.44591.75753.0456

picture of Cyclopentanone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 125.701 O1 C2 C4 125.701
C2 C3 C5 104.764 C2 C3 H7 107.956
C2 C3 H9 110.715 C2 C4 C6 104.764
C2 C4 H8 107.956 C2 C4 H10 110.715
C3 C2 C4 108.599 C3 C5 C6 103.567
C3 C5 H11 112.698 C3 C5 H13 109.950
C4 C6 C5 103.567 C4 C6 H12 112.698
C4 C6 H14 109.950 C5 C3 H7 110.439
C5 C3 H9 114.601 C5 C6 H12 112.538
C5 C6 H14 109.435 C6 C4 H8 110.439
C6 C4 H10 114.601 C6 C5 H11 112.538
C6 C5 H13 109.435 H7 C3 H9 108.175
H8 C4 H10 108.175 H11 C5 H13 108.557
H12 C6 H14 108.557
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.565      
2 C 0.573      
3 C -0.526      
4 C -0.526      
5 C -0.431      
6 C -0.431      
7 H 0.253      
8 H 0.253      
9 H 0.255      
10 H 0.255      
11 H 0.225      
12 H 0.225      
13 H 0.220      
14 H 0.220      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -3.215 3.215
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -35.687 -0.198 0.000
y -0.198 -35.448 0.000
z 0.000 0.000 -45.942
Traceless
 xyz
x 5.008 -0.198 0.000
y -0.198 5.366 0.000
z 0.000 0.000 -10.374
Polar
3z2-r2-20.748
x2-y2-0.238
xy-0.198
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.817 0.033 0.000
y 0.033 6.915 0.000
z 0.000 0.000 7.709


<r2> (average value of r2) Å2
<r2> 153.421
(<r2>)1/2 12.386