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: B3PW91/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/6-311G**
 hartrees
Energy at 0K-246.000472
Energy at 298.15K 
HF Energy-246.000472
Nuclear repulsion energy162.657924
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 B3PW91/6-311G**
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' 3293 3171 0.06 112.14 0.12 0.22
2 A' 3269 3148 0.09 53.24 0.66 0.80
3 A' 3246 3127 0.96 87.17 0.39 0.56
4 A' 1609 1550 9.11 1.54 0.11 0.20
5 A' 1477 1423 31.60 31.30 0.29 0.45
6 A' 1407 1355 6.01 2.34 0.20 0.33
7 A' 1250 1204 7.70 11.82 0.21 0.34
8 A' 1159 1116 22.17 2.16 0.63 0.77
9 A' 1132 1090 9.30 10.95 0.16 0.28
10 A' 1048 1009 6.57 3.36 0.63 0.77
11 A' 938 903 16.72 4.29 0.47 0.64
12 A' 924 890 0.05 2.24 0.59 0.74
13 A' 916 882 22.77 3.74 0.24 0.38
14 A" 912 878 5.19 1.24 0.75 0.86
15 A" 880 848 0.72 0.11 0.75 0.86
16 A" 790 761 62.59 0.40 0.75 0.86
17 A" 654 630 1.81 0.31 0.75 0.86
18 A" 614 591 15.19 0.93 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12758.0 cm-1
Scaled (by 0.9631) Zero Point Vibrational Energy (zpe) 12287.2 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 B3PW91/6-311G**
ABC
0.33010 0.32318 0.16330

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.125 0.365 0.000
C2 0.613 -0.959 0.000
C3 0.000 1.122 0.000
N4 -0.694 -0.983 0.000
O5 -1.086 0.341 0.000
H6 2.151 0.691 0.000
H7 1.151 -1.896 0.000
H8 -0.182 2.186 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 H6 H7 H8
C11.41951.35582.26362.21111.07722.26142.2412
C21.41952.16921.30662.13942.25631.08123.2434
C31.35582.16922.21631.33752.19413.23051.0790
N42.26361.30662.21631.38143.30122.05873.2095
O52.21112.13941.33751.38143.25643.16452.0536
H61.07722.25632.19413.30123.25642.77422.7711
H72.26141.08123.23052.05873.16452.77424.2942
H82.24123.24341.07903.20952.05362.77114.2942

picture of Isoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 112.203 C1 C2 H7 128.971
C1 C3 O5 110.356 C1 C3 H8 133.671
C2 C1 C3 102.794 C2 C1 H6 128.782
C2 N4 O5 105.452 C3 C1 H6 128.424
C3 O5 N4 109.195 N4 C2 H7 118.826
O5 C3 H8 115.973
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.344      
2 C 0.098      
3 C 0.178      
4 N -0.145      
5 O -0.191      
6 H 0.125      
7 H 0.134      
8 H 0.143      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.563 1.523 0.000 2.982
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.392 -2.580 0.000
y -2.580 -24.760 0.000
z 0.000 0.000 -29.914
Traceless
 xyz
x -1.054 -2.580 0.000
y -2.580 4.393 0.000
z 0.000 0.000 -3.338
Polar
3z2-r2-6.677
x2-y2-3.631
xy-2.580
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.185 -0.224 0.000
y -0.224 6.829 0.000
z 0.000 0.000 3.012


<r2> (average value of r2) Å2
<r2> 76.347
(<r2>)1/2 8.738