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

using model chemistry: MP2/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP2/6-31G**
 hartrees
Energy at 0K-284.528344
Energy at 298.15K-284.534720
HF Energy-283.637462
Nuclear repulsion energy223.410040
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 MP2/6-31G**
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 3363 3150 0.05      
2 A 3333 3122 2.44      
3 A 3247 3041 6.68      
4 A 3227 3022 6.98      
5 A 3138 2939 11.90      
6 A 1675 1569 22.37      
7 A 1550 1452 8.41      
8 A 1532 1435 6.54      
9 A 1517 1421 19.14      
10 A 1462 1369 1.87      
11 A 1393 1304 9.27      
12 A 1309 1225 11.38      
13 A 1231 1153 7.41      
14 A 1092 1023 1.42      
15 A 1086 1017 3.16      
16 A 1054 987 10.37      
17 A 1016 952 2.23      
18 A 957 896 13.85      
19 A 934 875 8.74      
20 A 861 806 11.37      
21 A 796 746 27.33      
22 A 667 625 0.65      
23 A 641 600 0.86      
24 A 620 580 2.12      
25 A 333 312 1.78      
26 A 245 230 1.82      
27 A 93 87 0.66      

Unscaled Zero Point Vibrational Energy (zpe) 19186.9 cm-1
Scaled (by 0.9365) Zero Point Vibrational Energy (zpe) 17968.6 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 MP2/6-31G**
ABC
0.30621 0.11864 0.08689

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G**

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.108 0.015 0.000
H2 -2.458 -0.518 0.882
H3 -2.543 1.012 -0.001
H4 -2.458 -0.519 -0.882
C5 -0.624 0.119 -0.000
O6 0.062 -1.055 0.000
N7 1.431 -0.799 -0.000
C8 1.531 0.524 0.000
H9 2.514 0.967 0.000
C10 0.266 1.156 0.000
H11 0.044 2.208 -0.001

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.08901.08731.08901.48682.41933.63103.67384.71842.63313.0719
H21.08901.76831.76392.13232.72373.99784.21635.26343.31663.8042
H31.08731.76831.76832.11633.32524.36694.10285.05712.81252.8502
H41.08901.76391.76832.13232.72333.99764.21655.26383.31703.8045
C51.48682.13232.11632.13231.35952.25082.19313.25081.36672.1936
O62.41932.72373.32522.72331.35951.39262.15683.17772.21983.2628
N73.63103.99784.36693.99762.25081.39261.32722.07122.27543.3111
C83.67384.21634.10284.21652.19312.15681.32721.07791.41362.2458
H94.71845.26345.05715.26383.25083.17772.07121.07792.25602.7641
C102.63313.31662.81253.31701.36672.21982.27541.41362.25601.0753
H113.07193.80422.85023.80452.19363.26283.31112.24582.76411.0753

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 116.346 C1 C5 C10 134.624
H2 C1 H3 108.685 H2 C1 H4 108.166
H2 C1 C5 110.809 H3 C1 H4 108.687
H3 C1 C5 109.624 H4 C1 C5 110.808
C5 O6 N7 109.732 C5 C10 C8 104.131
C5 C10 H11 127.460 O6 C5 C10 109.031
O6 N7 C8 104.909 N7 C8 H9 118.530
N7 C8 C10 112.196 C8 C10 H11 128.409
H9 C8 C10 129.274
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability