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: MP2/aug-cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/aug-cc-pVQZ
 hartrees
Energy at 0K-245.670597
Energy at 298.15K 
HF Energy-244.690724
Nuclear repulsion energy162.468417
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 MP2/aug-cc-pVQZ
Rotational Constants (cm-1) from geometry optimized at MP2/aug-cc-pVQZ
ABC
0.32772 0.32408 0.16295

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pVQZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.125 0.360 0.000
C2 0.623 -0.957 0.000
C3 0.000 1.125 0.000
N4 -0.698 -0.981 0.000
O5 -1.090 0.340 0.000
H6 2.146 0.693 0.000
H7 1.154 -1.893 0.000
H8 -0.187 2.183 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 H6 H7 H8
C11.40931.35992.26282.21461.07352.25362.2457
C21.40932.17261.32112.14832.24451.07623.2427
C31.35992.17262.21811.34302.18863.23081.0749
N42.26281.32112.21811.37763.29922.06393.2050
O52.21462.14831.34301.37763.25453.16522.0527
H61.07352.24452.18863.29923.25452.76942.7680
H72.25361.07623.23082.06393.16522.76944.2910
H82.24573.24271.07493.20502.05272.76804.2910

picture of Isoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 111.898 C1 C2 H7 129.620
C1 C3 O5 110.038 C1 C3 H8 134.209
C2 C1 C3 103.350 C2 C1 H6 128.882
C2 N4 O5 105.485 C3 C1 H6 127.768
C3 O5 N4 109.229 N4 C2 H7 118.482
O5 C3 H8 115.753
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability