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/TZVP

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/TZVP
 hartrees
Energy at 0K-245.448648
Energy at 298.15K 
HF Energy-244.662341
Nuclear repulsion energy162.000990
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/TZVP
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' 3342 3167 0.46 125.35 0.10 0.18
2 A' 3319 3146 0.75 41.30 0.73 0.84
3 A' 3303 3130 0.33 84.96 0.38 0.55
4 A' 1583 1501 7.21 9.10 0.06 0.12
5 A' 1456 1380 27.64 22.32 0.36 0.53
6 A' 1406 1333 2.62 5.15 0.06 0.12
7 A' 1242 1177 3.55 12.57 0.07 0.13
8 A' 1186 1124 22.90 3.32 0.47 0.64
9 A' 1143 1083 5.16 10.35 0.07 0.13
10 A' 1061 1006 6.99 3.20 0.69 0.81
11 A' 949 900 23.05 7.42 0.19 0.32
12 A' 921 873 2.92 5.34 0.48 0.65
13 A' 911 864 7.95 1.07 0.30 0.47
14 A" 790 749 39.32 0.43 0.75 0.86
15 A" 766 726 7.72 0.28 0.75 0.86
16 A" 734 696 35.15 0.39 0.75 0.86
17 A" 606 574 0.64 0.34 0.75 0.86
18 A" 555 526 9.27 0.27 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12636.0 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 11977.7 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 MP2/TZVP
ABC
0.32612 0.32199 0.16202

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.127 0.365 0.000
C2 0.626 -0.956 0.000
C3 0.000 1.126 0.000
N4 -0.697 -0.988 0.000
O5 -1.095 0.340 0.000
H6 2.150 0.697 0.000
H7 1.161 -1.892 0.000
H8 -0.191 2.185 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 H6 H7 H8
C11.41261.36032.27072.22241.07522.25672.2479
C21.41262.17451.32292.15432.24801.07773.2460
C31.36032.17452.22661.34862.19213.23371.0761
N42.27071.32292.22661.38653.30772.06533.2138
O52.22242.15431.34861.38653.26443.17302.0554
H61.07522.24802.19213.30773.26442.77112.7739
H72.25671.07773.23372.06533.17302.77114.2955
H82.24793.24601.07613.21382.05542.77394.2955

picture of Isoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 112.178 C1 C2 H7 129.476
C1 C3 O5 110.250 C1 C3 H8 134.287
C2 C1 C3 103.278 C2 C1 H6 128.776
C2 N4 O5 105.310 C3 C1 H6 127.946
C3 O5 N4 108.984 N4 C2 H7 118.347
O5 C3 H8 115.463
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability