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All results from a given calculation for C3H3NO (Isoxazole)

using model chemistry: QCISD/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-245.600319
Energy at 298.15K 
HF Energy-244.683657
Nuclear repulsion energy162.436833
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/Def2TZVPP
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' 3323 3323 0.18      
2 A' 3297 3297 0.15      
3 A' 3279 3279 1.08      
4 A' 1636 1636 11.41      
5 A' 1503 1503 34.44      
6 A' 1422 1422 10.32      
7 A' 1273 1273 6.70      
8 A' 1180 1180 22.70      
9 A' 1133 1133 9.26      
10 A' 1054 1054 4.35      
11 A' 945 945 18.58      
12 A' 924 924 0.14      
13 A' 918 918 20.81      
14 A" 931 931 5.93      
15 A" 902 902 0.19      
16 A" 801 801 60.07      
17 A" 648 648 2.68      
18 A" 607 607 13.10      

Unscaled Zero Point Vibrational Energy (zpe) 12887.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12887.8 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 QCISD/Def2TZVPP
ABC
0.32938 0.32193 0.16281

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.125 0.371 0.000
C2 0.614 -0.960 0.000
C3 0.000 1.121 0.000
N4 -0.689 -0.988 0.000
O5 -1.092 0.341 0.000
H6 2.147 0.700 0.000
H7 1.154 -1.892 0.000
H8 -0.181 2.181 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 H6 H7 H8
C11.42631.35232.26712.21711.07332.26382.2323
C21.42632.17051.30382.14592.25971.07693.2408
C31.35232.17052.21901.34162.18783.22701.0753
N42.26711.30382.21901.38903.30052.05293.2096
O52.21712.14591.34161.38903.25843.16732.0527
H61.07332.25972.18783.30053.25842.77622.7594
H72.26381.07693.22702.05293.16732.77624.2868
H82.23233.24081.07533.20962.05272.75944.2868

picture of Isoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 112.206 C1 C2 H7 128.943
C1 C3 O5 110.770 C1 C3 H8 133.394
C2 C1 C3 102.693 C2 C1 H6 128.836
C2 N4 O5 105.631 C3 C1 H6 128.471
C3 O5 N4 108.701 N4 C2 H7 118.852
O5 C3 H8 115.836
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability