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All results from a given calculation for C4H5NO (3-Methylisoxazole)

using model chemistry: G4

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at G4
 hartrees
Energy at 0K-285.210283
Energy at 298.15K-285.204116
HF Energy-285.377864
Nuclear repulsion energy223.430242
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 B3LYP/6-31G(2df,p)
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 3284 3169 0.60      
2 A 3260 3146 0.18      
3 A 3141 3031 5.75      
4 A 3099 2991 11.93      
5 A 3043 2937 15.37      
6 A 1617 1560 26.30      
7 A 1498 1446 6.19      
8 A 1483 1431 6.10      
9 A 1482 1430 9.84      
10 A 1440 1390 39.80      
11 A 1408 1359 2.30      
12 A 1295 1250 2.82      
13 A 1160 1119 15.47      
14 A 1088 1050 8.87      
15 A 1067 1030 2.69      
16 A 1036 999 2.71      
17 A 978 944 2.42      
18 A 945 912 3.54      
19 A 907 875 23.18      
20 A 871 840 0.92      
21 A 797 769 34.23      
22 A 673 650 0.72      
23 A 661 638 5.26      
24 A 615 593 3.42      
25 A 335 323 6.33      
26 A 276 267 4.20      
27 A 133 128 0.03      

Unscaled Zero Point Vibrational Energy (zpe) 18795.8 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 18138.0 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 B3LYP/6-31G(2df,p)
ABC
0.30681 0.11750 0.08633

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.130 0.024 0.000
H2 -2.522 0.540 -0.882
H3 -2.503 -1.001 -0.000
H4 -2.522 0.540 0.883
C5 1.482 0.573 0.000
O6 1.378 -0.763 0.000
N7 0.028 -1.107 -0.000
C8 -0.635 0.027 0.000
C9 0.254 1.145 -0.000
H10 0.007 2.193 -0.000
H11 2.487 0.967 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 C9 H10 H11
C11.09491.09151.09493.65333.59522.43661.49492.63363.04464.7120
H21.09491.77631.76524.10014.20563.16142.14552.97443.14725.1038
H31.09151.77631.77634.28503.88862.53362.13243.49364.06275.3641
H41.09491.76521.77634.10014.20553.16142.14552.97453.14745.1038
C53.65334.10014.28504.10011.34022.22182.18641.35502.19141.0792
O63.59524.20563.88864.20551.34021.39302.16242.21463.25912.0544
N72.43663.16142.53363.16142.22181.39301.31332.26303.30053.2163
C81.49492.14552.13242.14552.18642.16241.31331.42822.25983.2603
C92.63362.97443.49362.97451.35502.21462.26301.42821.07732.2406
H103.04463.14724.06273.14742.19143.25913.30052.25981.07732.7673
H114.71205.10385.36415.10381.07922.05443.21633.26032.24062.7673

picture of 3-Methylisoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C8 N7 120.976 C1 C8 C9 128.208
H2 C1 H3 108.770 H2 C1 H4 107.592
H2 C1 C8 110.812 H3 C1 H4 108.769
H3 C1 C8 110.015 H4 C1 C8 110.809
C5 O6 N7 108.576 C5 C9 C8 103.120
C5 C9 H10 128.620 O6 C5 C9 110.757
O6 C5 H11 115.983 O6 N7 C8 106.730
N7 C8 C9 110.816 C8 C9 H10 128.260
C9 C5 H11 133.260
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.493      
2 H 0.139      
3 H 0.152      
4 H 0.139      
5 C 0.087      
6 O -0.163      
7 N -0.192      
8 C 0.388      
9 C -0.323      
10 H 0.118      
11 H 0.150      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.493 2.825 0.000 2.867
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 136.488
(<r2>)1/2 11.683