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/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-245.818176
Energy at 298.15K 
HF Energy-245.565308
Nuclear repulsion energy161.480768
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/cc-pVDZ
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' 3318 3179 0.10 120.63 0.11 0.19
2 A' 3294 3156 0.15 53.30 0.69 0.81
3 A' 3274 3137 0.80 92.79 0.39 0.57
4 A' 1597 1531 7.98 2.50 0.06 0.11
5 A' 1473 1412 30.56 26.73 0.35 0.51
6 A' 1400 1342 4.83 2.71 0.12 0.21
7 A' 1238 1186 6.47 12.06 0.20 0.33
8 A' 1153 1105 20.84 2.52 0.74 0.85
9 A' 1127 1080 7.22 10.43 0.17 0.30
10 A' 1042 998 7.15 4.64 0.69 0.82
11 A' 930 891 9.91 4.58 0.60 0.75
12 A' 913 874 0.59 1.12 0.43 0.60
13 A' 882 845 22.40 5.49 0.16 0.27
14 A" 902 864 4.78 1.81 0.75 0.86
15 A" 865 829 0.08 0.23 0.75 0.86
16 A" 784 751 49.00 1.14 0.75 0.86
17 A" 647 620 2.18 0.37 0.75 0.86
18 A" 610 584 12.91 1.10 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12723.6 cm-1
Scaled (by 0.9582) Zero Point Vibrational Energy (zpe) 12191.8 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/cc-pVDZ
ABC
0.32495 0.31898 0.16097

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.133 0.366 0.000
C2 0.619 -0.963 0.000
C3 0.000 1.129 0.000
N4 -0.699 -0.992 0.000
O5 -1.095 0.346 0.000
H6 2.166 0.696 0.000
H7 1.160 -1.907 0.000
H8 -0.185 2.199 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 H6 H7 H8
C11.42551.36592.28072.22791.08452.27342.2576
C21.42552.18171.31852.15622.26891.08813.2629
C31.36592.18172.23271.34602.20923.25011.0862
N42.28071.31852.23271.39433.32572.07273.2320
O52.22792.15621.34601.39433.27973.18732.0649
H61.08452.26892.20923.32573.27972.79072.7906
H72.27341.08813.25012.07273.18732.79074.3209
H82.25763.26291.08623.23202.06492.79064.3209

picture of Isoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 112.381 C1 C2 H7 129.008
C1 C3 O5 110.474 C1 C3 H8 133.732
C2 C1 C3 102.790 C2 C1 H6 128.854
C2 N4 O5 105.238 C3 C1 H6 128.356
C3 O5 N4 109.117 N4 C2 H7 118.611
O5 C3 H8 115.794
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP=FULLultrafine/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.153      
2 C 0.123      
3 C 0.203      
4 N -0.103      
5 O -0.146      
6 H 0.010      
7 H 0.027      
8 H 0.039      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.387 1.435 0.000 2.785
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.492 -2.434 -0.004
y -2.434 -25.086 0.000
z -0.004 0.000 -29.939
Traceless
 xyz
x -0.979 -2.434 -0.004
y -2.434 4.130 0.000
z -0.004 0.000 -3.151
Polar
3z2-r2-6.301
x2-y2-3.406
xy-2.434
xz-0.004
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.070 -0.282 0.000
y -0.282 6.807 0.000
z 0.000 0.000 2.659


<r2> (average value of r2) Å2
<r2> 77.286
(<r2>)1/2 8.791