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: B2PLYP=FULLultrafine/STO-3G

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=FULLultrafine/STO-3G
 hartrees
Energy at 0K-242.523470
Energy at 298.15K 
HF Energy-242.411799
Nuclear repulsion energy157.322037
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=FULLultrafine/STO-3G
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' 3572 3572 20.14 57.14 0.13 0.23
2 A' 3532 3532 23.55 17.01 0.46 0.63
3 A' 3525 3525 10.94 70.22 0.53 0.69
4 A' 1662 1662 5.90 2.79 0.20 0.33
5 A' 1487 1487 30.33 10.03 0.61 0.76
6 A' 1446 1446 3.67 12.80 0.42 0.60
7 A' 1279 1279 2.51 5.39 0.21 0.35
8 A' 1198 1198 5.62 12.14 0.40 0.57
9 A' 1158 1158 1.55 3.11 0.20 0.34
10 A' 1107 1107 0.36 6.34 0.60 0.75
11 A' 1023 1023 7.64 6.39 0.13 0.23
12 A' 940 940 1.22 4.86 0.74 0.85
13 A' 918 918 2.05 0.12 0.68 0.81
14 A" 927 927 0.08 0.90 0.75 0.86
15 A" 889 889 1.53 2.01 0.75 0.86
16 A" 800 800 27.29 1.09 0.75 0.86
17 A" 636 636 4.22 0.06 0.75 0.86
18 A" 588 588 0.28 0.84 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13343.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 13343.1 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=FULLultrafine/STO-3G
ABC
0.30831 0.30319 0.15286

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.142 0.389 0.000
C2 0.664 -0.967 0.000
C3 0.000 1.156 0.000
N4 -0.708 -1.039 0.000
O5 -1.141 0.342 0.000
H6 2.179 0.730 0.000
H7 1.249 -1.894 0.000
H8 -0.176 2.238 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 H6 H7 H8
C11.43751.37602.33722.28441.09122.28502.2717
C21.43752.22401.37442.23012.27481.09603.3137
C31.37602.22402.30581.40182.21993.29541.0971
N42.33721.37442.30581.44683.38602.13613.3199
O52.28442.23011.40181.44683.34293.27302.1280
H61.09122.27482.21993.38603.34292.78402.7967
H72.28501.09603.29542.13613.27302.78404.3712
H82.27173.31371.09713.31992.12802.79674.3712

picture of Isoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 112.422 C1 C2 H7 128.317
C1 C3 O5 110.640 C1 C3 H8 133.126
C2 C1 C3 104.442 C2 C1 H6 127.674
C2 N4 O5 104.428 C3 C1 H6 127.885
C3 O5 N4 108.068 N4 C2 H7 119.261
O5 C3 H8 116.234
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP=FULLultrafine/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.113      
2 C -0.024      
3 C 0.016      
4 N -0.109      
5 O -0.062      
6 H 0.093      
7 H 0.097      
8 H 0.102      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.858 1.383 0.000 2.316
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.774 -2.121 -0.000
y -2.121 -24.453 0.001
z -0.000 0.001 -26.866
Traceless
 xyz
x -1.114 -2.121 -0.000
y -2.121 2.367 0.001
z -0.000 0.001 -1.253
Polar
3z2-r2-2.506
x2-y2-2.320
xy-2.121
xz-0.000
yz0.001


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.798 -0.284 0.000
y -0.284 4.419 0.000
z 0.000 0.000 0.806


<r2> (average value of r2) Å2
<r2> 79.156
(<r2>)1/2 8.897