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: PBEPBE/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBEPBE/6-31G**
 hartrees
Energy at 0K-245.762770
Energy at 298.15K 
HF Energy-245.762770
Nuclear repulsion energy160.769935
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/6-31G**
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' 3234 3190 0.06 115.55 0.11 0.19
2 A' 3208 3164 0.01 63.79 0.61 0.76
3 A' 3186 3143 1.39 93.24 0.38 0.55
4 A' 1560 1539 6.69 2.16 0.08 0.15
5 A' 1438 1418 26.42 23.95 0.38 0.55
6 A' 1365 1346 3.24 2.84 0.12 0.21
7 A' 1208 1192 4.85 12.48 0.23 0.37
8 A' 1121 1106 17.59 4.37 0.72 0.84
9 A' 1104 1089 5.51 9.58 0.14 0.24
10 A' 1024 1010 8.11 5.37 0.72 0.83
11 A' 899 887 6.94 3.03 0.55 0.71
12 A' 890 877 0.81 2.39 0.66 0.80
13 A' 851 839 21.62 5.38 0.15 0.26
14 A" 862 850 5.67 2.53 0.75 0.86
15 A" 817 805 0.22 0.52 0.75 0.86
16 A" 753 743 48.32 1.73 0.75 0.86
17 A" 629 620 1.63 0.52 0.75 0.86
18 A" 592 584 12.08 1.05 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12369.8 cm-1
Scaled (by 0.9863) Zero Point Vibrational Energy (zpe) 12200.3 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/6-31G**
ABC
0.32222 0.31620 0.15959

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.135 0.368 0.000
C2 0.624 -0.962 0.000
C3 0.000 1.134 0.000
N4 -0.700 -1.002 0.000
O5 -1.102 0.347 0.000
H6 2.170 0.698 0.000
H7 1.175 -1.903 0.000
H8 -0.187 2.206 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 H6 H7 H8
C11.42521.36902.29032.23721.08652.27192.2638
C21.42522.18681.32452.16612.26881.09053.2702
C31.36902.18682.24781.35432.21353.25641.0883
N42.29031.32452.24781.40753.33612.08013.2489
O52.23722.16611.35431.40753.29113.20102.0722
H61.08652.26882.21353.33613.29112.78532.7983
H72.27191.09053.25642.08013.20102.78534.3290
H82.26383.27021.08833.24892.07222.79834.3290

picture of Isoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 112.750 C1 C2 H7 128.639
C1 C3 O5 110.467 C1 C3 H8 133.898
C2 C1 C3 102.983 C2 C1 H6 128.687
C2 N4 O5 104.862 C3 C1 H6 128.331
C3 O5 N4 108.938 N4 C2 H7 118.611
O5 C3 H8 115.635
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.197      
2 C 0.083      
3 C 0.167      
4 N -0.164      
5 O -0.287      
6 H 0.120      
7 H 0.135      
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
  2.412 1.482 0.000 2.831
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.981 -2.422 0.000
y -2.422 -24.701 0.000
z 0.000 0.000 -29.554
Traceless
 xyz
x -0.854 -2.422 0.000
y -2.422 4.067 0.000
z 0.000 0.000 -3.213
Polar
3z2-r2-6.426
x2-y2-3.281
xy-2.422
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.150 -0.213 0.000
y -0.213 6.912 0.000
z 0.000 0.000 2.506


<r2> (average value of r2) Å2
<r2> 77.507
(<r2>)1/2 8.804