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

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-285.211783
Energy at 298.15K-285.205536
HF Energy-285.379498
Nuclear repulsion energy224.008092
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 3281 3166 0.29      
2 A 3243 3130 3.52      
3 A 3139 3029 7.78      
4 A 3101 2992 7.67      
5 A 3044 2937 13.87      
6 A 1641 1583 33.82      
7 A 1517 1464 41.75      
8 A 1488 1435 8.55      
9 A 1474 1423 6.12      
10 A 1413 1364 1.03      
11 A 1374 1325 6.88      
12 A 1261 1216 21.80      
13 A 1216 1173 7.82      
14 A 1066 1029 3.12      
15 A 1057 1020 3.81      
16 A 1027 991 9.28      
17 A 1004 969 0.93      
18 A 945 912 9.62      
19 A 917 885 3.50      
20 A 909 877 15.25      
21 A 807 778 28.24      
22 A 662 639 0.39      
23 A 656 633 2.46      
24 A 645 623 1.62      
25 A 333 321 1.75      
26 A 253 244 1.59      
27 A 95 92 0.66      

Unscaled Zero Point Vibrational Energy (zpe) 18782.2 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 18124.8 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
0.30952 0.11891 0.08731

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 2.103 0.016 0.000
H2 2.462 -0.524 -0.882
H3 2.544 1.014 -0.000
H4 2.462 -0.523 0.883
C5 0.619 0.110 -0.000
O6 -0.064 -1.051 0.000
N7 -1.433 -0.788 -0.000
C8 -1.529 0.518 0.000
H9 -2.510 0.971 0.000
C10 -0.258 1.152 -0.000
H11 -0.033 2.205 -0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.09491.09151.09491.48742.41543.62613.66664.71162.62033.0588
H21.09491.77521.76562.13942.72674.00184.21775.26663.31423.8013
H31.09151.77521.77522.12713.32664.36614.10305.05492.80562.8390
H41.09491.76561.77522.13942.72714.00214.21765.26643.31393.8008
C51.48742.13942.12712.13941.34662.23942.18613.24561.36162.1940
O62.41542.72673.32662.72711.34661.39382.14643.17362.21083.2557
N73.62614.00184.36614.00212.23941.39381.30962.06252.26743.3038
C83.66664.21774.10304.21762.18612.14641.30961.08111.41972.2542
H94.71165.26665.05495.26643.24563.17362.06251.08112.25972.7679
C102.62033.31422.80563.31391.36162.21082.26741.41972.25971.0771
H113.05883.80132.83903.80082.19403.25573.30382.25422.76791.0771

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 116.755 C1 C5 C10 133.515
H2 C1 H3 108.692 H2 C1 H4 107.623
H2 C1 C5 110.808 H3 C1 H4 108.691
H3 C1 C5 110.141 H4 C1 C5 110.807
C5 O6 N7 109.418 C5 C10 C8 103.232
C5 C10 H11 128.304 O6 C5 C10 109.731
O6 N7 C8 105.803 N7 C8 H9 119.564
N7 C8 C10 111.817 C8 C10 H11 128.465
H9 C8 C10 128.619
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 -0.489      
2 H 0.152      
3 H 0.142      
4 H 0.152      
5 C 0.428      
6 O -0.203      
7 N -0.141      
8 C 0.038      
9 H 0.131      
10 C -0.327      
11 H 0.117      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.892 2.480 0.000 3.120
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> 135.466
(<r2>)1/2 11.639