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

using model chemistry: B1B95/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B1B95/6-31G
 hartrees
Energy at 0K-285.151034
Energy at 298.15K-285.157413
Nuclear repulsion energy221.727705
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 B1B95/6-31G
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 3342 3187 0.23      
2 A 3313 3160 1.93      
3 A 3186 3038 7.29      
4 A 3152 3006 6.49      
5 A 3078 2936 9.93      
6 A 1668 1591 41.46      
7 A 1527 1456 16.90      
8 A 1521 1451 28.74      
9 A 1517 1447 11.99      
10 A 1463 1395 2.76      
11 A 1375 1312 7.08      
12 A 1264 1205 20.97      
13 A 1242 1184 13.92      
14 A 1105 1054 8.29      
15 A 1082 1032 5.51      
16 A 1043 994 3.46      
17 A 982 936 5.64      
18 A 939 896 4.28      
19 A 937 894 5.90      
20 A 842 803 45.59      
21 A 814 776 13.48      
22 A 664 634 0.34      
23 A 653 623 0.88      
24 A 622 593 1.31      
25 A 331 316 3.05      
26 A 252 241 3.36      
27 A 95 91 1.34      

Unscaled Zero Point Vibrational Energy (zpe) 19004.6 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 18124.7 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 B1B95/6-31G
ABC
0.30445 0.11660 0.08565

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.115 0.015 0.000
H2 2.470 -0.525 -0.882
H3 2.558 1.011 -0.000
H4 2.470 -0.524 0.882
C5 0.638 0.111 -0.000
O6 -0.060 -1.073 -0.000
N7 -1.479 -0.782 0.000
C8 -1.530 0.538 -0.000
H9 -2.497 1.015 0.000
C10 -0.246 1.150 -0.000
H11 -0.024 2.201 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.09341.09021.09341.47942.43243.68083.68234.71862.61943.0579
H21.09341.77311.76362.13012.73564.05454.23245.27463.31083.7986
H31.09021.77311.77312.12043.34704.41714.11555.05462.80772.8425
H41.09341.76361.77312.13012.73594.05474.23245.27453.31063.7981
C51.47942.13012.12042.13011.37482.29752.21053.26301.36472.1932
O62.43242.73563.34702.73591.37481.44792.18133.20902.23073.2751
N73.68084.05454.41714.05472.29751.44791.32132.06552.29123.3195
C83.68234.23244.11554.23242.21052.18131.32131.07761.42202.2443
H94.71865.27465.05465.27453.26303.20902.06551.07762.25442.7431
C102.61943.31082.80773.31061.36472.23072.29121.42202.25441.0753
H113.05793.79862.84253.79812.19323.27513.31952.24432.74311.0753

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 116.861 C1 C5 C10 134.103
H2 C1 H3 108.586 H2 C1 H4 107.512
H2 C1 C5 110.884 H3 C1 H4 108.585
H3 C1 C5 110.297 H4 C1 C5 110.885
C5 O6 N7 108.940 C5 C10 C8 104.956
C5 C10 H11 127.621 O6 C5 C10 109.036
O6 N7 C8 103.850 N7 C8 H9 118.500
N7 C8 C10 113.218 C8 C10 H11 127.423
H9 C8 C10 128.282
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.493      
2 H 0.201      
3 H 0.180      
4 H 0.201      
5 C 0.290      
6 O -0.430      
7 N -0.125      
8 C -0.024      
9 H 0.205      
10 C -0.187      
11 H 0.181      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.035 3.172 0.000 3.768
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.738 -3.993 0.000
y -3.993 -36.134 0.000
z 0.000 0.000 -35.933
Traceless
 xyz
x 5.295 -3.993 0.000
y -3.993 -2.798 0.000
z 0.000 0.000 -2.497
Polar
3z2-r2-4.994
x2-y25.396
xy-3.993
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.249 -0.392 0.000
y -0.392 7.148 0.000
z 0.000 0.000 3.597


<r2> (average value of r2) Å2
<r2> 137.660
(<r2>)1/2 11.733