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All results from a given calculation for C4H5NO (Isoxazole, 5-methyl-)

using model chemistry: MP2/CEP-121G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP2/CEP-121G*
 hartrees
Energy at 0K-51.054001
Energy at 298.15K-51.060254
HF Energy-50.182455
Nuclear repulsion energy116.287560
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/CEP-121G*
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 3300 3144 0.10      
2 A 3273 3118 2.52      
3 A 3191 3040 9.82      
4 A 3169 3020 9.31      
5 A 3078 2933 16.86      
6 A 1631 1554 23.62      
7 A 1526 1454 10.37      
8 A 1507 1436 9.85      
9 A 1475 1405 21.92      
10 A 1445 1377 2.20      
11 A 1357 1293 11.60      
12 A 1279 1219 13.90      
13 A 1200 1143 10.48      
14 A 1063 1013 4.66      
15 A 1063 1013 0.34      
16 A 1038 989 10.66      
17 A 996 949 2.28      
18 A 946 901 16.47      
19 A 916 873 7.98      
20 A 810 772 16.38      
21 A 793 755 45.41      
22 A 652 621 0.62      
23 A 617 588 1.09      
24 A 602 574 0.50      
25 A 327 311 2.04      
26 A 234 223 2.48      
27 A 80 76 0.82      

Unscaled Zero Point Vibrational Energy (zpe) 18782.4 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 17895.9 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 MP2/CEP-121G*
ABC
0.30175 0.11680 0.08556

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.090 0.034 0.000
H2 -2.442 -0.499 0.888
H3 -2.515 1.041 -0.001
H4 -2.443 -0.501 -0.887
C5 -0.593 0.125 -0.000
O6 0.083 -1.065 -0.000
N7 1.468 -0.824 0.000
C8 1.585 0.509 0.000
H9 2.582 0.934 0.000
C10 0.316 1.160 0.000
H11 0.106 2.221 -0.001

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.09451.09281.09451.49962.43503.65943.70474.75722.65613.0983
H21.09451.77991.77512.14482.73614.02284.24515.29943.33943.8316
H31.09281.77991.77992.12913.34444.39764.13395.09772.83372.8738
H41.09451.77511.77992.14482.73564.02274.24545.30003.34003.8322
C51.49962.14482.12912.14481.36882.26862.21083.27581.37712.2087
O62.43502.73613.34442.73561.36881.40562.17513.20002.23703.2858
N73.65944.02284.39764.02272.26861.40561.33742.08102.29353.3352
C83.70474.24514.13394.24542.21082.17511.33741.08411.42572.2624
H94.75725.29945.09775.30003.27583.20002.08101.08412.27662.7903
C102.65613.33942.83373.34001.37712.23702.29351.42572.27661.0817
H113.09833.83162.87383.83222.20873.28583.33522.26242.79031.0817

picture of Isoxazole, 5-methyl- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C5 O6 116.107 C1 C5 C10 134.787
H2 C1 H3 108.927 H2 C1 H4 108.377
H2 C1 C5 110.572 H3 C1 H4 108.930
H3 C1 C5 109.424 H4 C1 C5 110.571
C5 O6 N7 109.699 C5 C10 C8 104.132
C5 C10 H11 127.460 O6 C5 C10 109.106
O6 N7 C8 104.896 N7 C8 H9 118.122
N7 C8 C10 112.166 C8 C10 H11 128.408
H9 C8 C10 129.711
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability