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 (Isoxazole)

using model chemistry: BLYP/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 BLYP/3-21G
 hartrees
Energy at 0K-244.606920
Energy at 298.15K 
HF Energy-244.606920
Nuclear repulsion energy156.693438
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 BLYP/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3234 3216 0.09 105.69 0.10 0.19
2 A' 3204 3186 0.21 70.25 0.60 0.75
3 A' 3179 3161 1.47 82.32 0.39 0.56
4 A' 1496 1488 7.49 5.47 0.13 0.23
5 A' 1350 1342 24.91 11.15 0.63 0.77
6 A' 1321 1313 0.65 13.61 0.33 0.50
7 A' 1169 1163 4.55 9.71 0.24 0.39
8 A' 1113 1107 13.93 9.03 0.67 0.80
9 A' 1043 1037 1.88 8.12 0.16 0.27
10 A' 977 972 13.08 3.10 0.41 0.58
11 A' 909 904 2.88 5.16 0.63 0.77
12 A' 860 855 1.37 1.35 0.46 0.63
13 A' 719 715 10.12 7.09 0.15 0.27
14 A" 888 883 2.93 1.99 0.75 0.86
15 A" 848 843 4.21 1.59 0.75 0.86
16 A" 763 759 66.69 1.73 0.75 0.86
17 A" 611 608 11.42 0.15 0.75 0.86
18 A" 558 555 4.99 1.75 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12119.9 cm-1
Scaled (by 0.9945) Zero Point Vibrational Energy (zpe) 12053.2 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 BLYP/3-21G
ABC
0.30941 0.29668 0.15146

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.135 0.391 0.000
C2 0.654 -0.965 0.000
C3 0.000 1.162 0.000
N4 -0.683 -1.081 0.000
O5 -1.151 0.370 0.000
H6 2.165 0.722 0.000
H7 1.252 -1.872 0.000
H8 -0.159 2.234 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 H6 H7 H8
C11.43871.37212.33882.28581.08212.26582.2524
C21.43872.22531.34222.24492.26491.08633.3011
C31.37212.22532.34411.39692.20923.28211.0841
N42.33881.34222.34411.52393.37072.09103.3558
O52.28582.24491.39691.52393.33443.28642.1114
H61.08212.26492.20923.37073.33442.75002.7730
H72.26581.08633.28212.09103.28642.75004.3420
H82.25243.30111.08413.35582.11142.77304.3420

picture of Isoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 114.458 C1 C2 H7 127.064
C1 C3 O5 111.271 C1 C3 H8 132.649
C2 C1 C3 104.665 C2 C1 H6 127.358
C2 N4 O5 102.937 C3 C1 H6 127.977
C3 O5 N4 106.669 N4 C2 H7 118.477
O5 C3 H8 116.080
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.292      
2 C 0.062      
3 C 0.136      
4 N -0.215      
5 O -0.305      
6 H 0.177      
7 H 0.217      
8 H 0.221      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.684 1.402 0.000 3.028
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.612 -2.421 0.000
y -2.421 -24.671 0.000
z 0.000 0.000 -30.132
Traceless
 xyz
x -1.211 -2.421 0.000
y -2.421 4.701 0.000
z 0.000 0.000 -3.490
Polar
3z2-r2-6.980
x2-y2-3.942
xy-2.421
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.762 -0.288 0.000
y -0.288 6.632 0.000
z 0.000 0.000 1.789


<r2> (average value of r2) Å2
<r2> 80.692
(<r2>)1/2 8.983