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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-284.488992
Energy at 298.15K-284.495351
HF Energy-283.628395
Nuclear repulsion energy223.242253
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 3329 3140 0.12      
2 A 3302 3114 2.02      
3 A 3218 3034 5.74      
4 A 3197 3015 5.69      
5 A 3115 2937 9.88      
6 A 1672 1577 23.61      
7 A 1553 1465 9.97      
8 A 1536 1449 8.24      
9 A 1513 1427 20.07      
10 A 1468 1385 1.73      
11 A 1392 1313 10.06      
12 A 1309 1234 12.20      
13 A 1231 1161 9.05      
14 A 1094 1032 2.06      
15 A 1087 1025 3.30      
16 A 1055 995 10.93      
17 A 1016 958 2.15      
18 A 956 901 13.55      
19 A 934 881 9.11      
20 A 849 801 14.56      
21 A 784 739 28.26      
22 A 668 630 0.66      
23 A 642 605 0.87      
24 A 621 585 2.41      
25 A 334 315 1.96      
26 A 246 232 2.01      
27 A 96 91 0.68      

Unscaled Zero Point Vibrational Energy (zpe) 19109.2 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 18020.0 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
0.30581 0.11850 0.08679

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 2.106 0.017 -0.000
H2 2.461 -0.519 -0.884
H3 2.539 1.019 -0.000
H4 2.461 -0.518 0.885
C5 0.622 0.115 -0.000
O6 -0.059 -1.058 0.000
N7 -1.433 -0.797 0.000
C8 -1.530 0.523 -0.000
H9 -2.515 0.973 -0.000
C10 -0.264 1.157 -0.000
H11 -0.043 2.214 -0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.09361.09141.09361.48702.41763.63133.67084.71892.62913.0730
H21.09361.77571.76892.13712.72514.00324.21895.27023.31893.8110
H31.09141.77571.77572.11933.32674.36754.09915.05462.80602.8452
H41.09361.76891.77572.13712.72554.00344.21885.27013.31873.8106
C51.48702.13712.11932.13711.35712.24842.19043.25251.36702.2016
O62.41762.72513.32672.72551.35711.39862.15983.18712.22443.2724
N73.63134.00324.36754.00342.24841.39861.32352.07402.27673.3159
C83.67084.21894.09914.21882.19042.15981.32351.08301.41592.2513
H94.71895.27025.05465.27013.25253.18712.07401.08302.25932.7663
C102.62913.31892.80603.31871.36702.22442.27671.41592.25931.0800
H113.07303.81102.84523.81062.20163.27243.31592.25132.76631.0800

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 116.359 C1 C5 C10 134.156
H2 C1 H3 108.712 H2 C1 H4 107.948
H2 C1 C5 110.898 H3 C1 H4 108.712
H3 C1 C5 109.608 H4 C1 C5 110.899
C5 O6 N7 109.350 C5 C10 C8 103.811
C5 C10 H11 127.847 O6 C5 C10 109.485
O6 N7 C8 104.982 N7 C8 H9 118.705
N7 C8 C10 112.373 C8 C10 H11 128.342
H9 C8 C10 128.922
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability