return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C3H3NO (Oxazole)

using model chemistry: B2PLYP/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B2PLYP/3-21G
 hartrees
Energy at 0K-244.382692
Energy at 298.15K-244.387268
HF Energy-244.209911
Nuclear repulsion energy159.948553
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 B2PLYP/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' 3370 3370 0.28      
2 A' 3353 3353 0.47      
3 A' 3337 3337 1.16      
4 A' 1524 1524 3.57      
5 A' 1468 1468 12.86      
6 A' 1332 1332 18.35      
7 A' 1282 1282 0.24      
8 A' 1165 1165 9.57      
9 A' 1041 1041 10.50      
10 A' 1026 1026 7.14      
11 A' 991 991 21.71      
12 A' 899 899 8.96      
13 A' 882 882 37.31      
14 A" 913 913 0.60      
15 A" 858 858 33.74      
16 A" 796 796 42.20      
17 A" 663 663 19.30      
18 A" 621 621 14.80      

Unscaled Zero Point Vibrational Energy (zpe) 12759.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12759.4 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 B2PLYP/3-21G
ABC
0.31984 0.31228 0.15801

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 -1.114 0.310 0.000
C2 0.000 1.147 0.000
N3 1.126 0.475 0.000
C4 0.763 -0.900 0.000
C5 -0.597 -1.000 0.000
H6 -0.166 2.206 0.000
H7 1.496 -1.683 0.000
H8 -1.299 -1.809 0.000

Atom - Atom Distances (Å)
  O1 C2 N3 C4 C5 H6 H7 H8
O11.39342.24562.23291.40772.11993.28332.1265
C21.39341.31142.18512.22861.07183.20153.2288
N32.24561.31141.42232.26822.16022.18983.3310
C42.23292.18511.42231.36403.24241.07232.2534
C51.40772.22862.26821.36403.23482.20171.0708
H62.11991.07182.16023.24243.23484.22974.1715
H73.28333.20152.18981.07232.20174.22972.7974
H82.12653.22883.33102.25341.07084.17152.7974

picture of Oxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 N3 112.211 O1 C2 H6 118.026
O1 C5 C4 107.330 O1 C5 H8 117.535
C2 O1 C5 105.431 C2 N3 C4 106.063
N3 C2 H6 129.763 N3 C4 C5 108.966
N3 C4 H7 122.139 C4 C5 H8 135.136
C5 C4 H7 128.895
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.464      
2 C 0.283      
3 N -0.489      
4 C -0.078      
5 C 0.027      
6 H 0.255      
7 H 0.224      
8 H 0.241      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.087 -0.966 0.000 1.454
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.953 -1.149 0.000
y -1.149 -22.143 0.000
z 0.000 0.000 -30.118
Traceless
 xyz
x -5.822 -1.149 0.000
y -1.149 8.893 0.000
z 0.000 0.000 -3.071
Polar
3z2-r2-6.142
x2-y2-9.810
xy-1.149
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.227 -0.046 0.000
y -0.046 6.118 0.000
z 0.000 0.000 1.814


<r2> (average value of r2) Å2
<r2> 78.258
(<r2>)1/2 8.846