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All results from a given calculation for C3H3NO (Isoxazole)

using model chemistry: QCISD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/6-31G(2df,p)
 hartrees
Energy at 0K-245.492261
Energy at 298.15K 
HF Energy-244.610401
Nuclear repulsion energy162.334181
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 QCISD/6-31G(2df,p)
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' 3341 3165 0.33      
2 A' 3311 3136 0.17      
3 A' 3296 3122 0.96      
4 A' 1639 1553 9.24      
5 A' 1502 1423 31.86      
6 A' 1421 1346 12.11      
7 A' 1273 1206 6.94      
8 A' 1189 1126 19.88      
9 A' 1136 1076 8.24      
10 A' 1058 1003 3.62      
11 A' 946 896 26.51      
12 A' 929 880 5.84      
13 A' 925 876 5.65      
14 A" 932 883 4.55      
15 A" 899 852 0.95      
16 A" 802 760 45.10      
17 A" 651 616 2.71      
18 A" 608 576 13.46      

Unscaled Zero Point Vibrational Energy (zpe) 12928.0 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 12247.9 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 QCISD/6-31G(2df,p)
ABC
0.32859 0.32190 0.16261

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.128 0.372 0.000
C2 0.615 -0.960 0.000
C3 0.000 1.120 0.000
N4 -0.692 -0.987 0.000
O5 -1.092 0.341 0.000
H6 2.152 0.701 0.000
H7 1.156 -1.894 0.000
H8 -0.188 2.182 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 H6 H7 H8
C11.42721.35412.27162.22021.07542.26612.2379
C21.42722.16951.30782.14612.26301.07933.2426
C31.35412.16952.21801.34152.19243.22851.0777
N42.27161.30782.21801.38633.30742.05883.2082
O52.22022.14611.34151.38633.26363.16962.0507
H61.07542.26302.19243.30743.26362.78002.7689
H72.26611.07933.22852.05883.16962.78004.2915
H82.23793.24261.07773.20822.05072.76894.2915

picture of Isoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 112.240 C1 C2 H7 128.874
C1 C3 O5 110.902 C1 C3 H8 133.612
C2 C1 C3 102.496 C2 C1 H6 128.910
C2 N4 O5 105.576 C3 C1 H6 128.594
C3 O5 N4 108.786 N4 C2 H7 118.886
O5 C3 H8 115.486
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability