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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-285.253307
Energy at 298.15K-285.259716
Nuclear repulsion energy224.731748
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 3312 3162 0.18      
2 A 3270 3123 3.84      
3 A 3182 3038 6.29      
4 A 3145 3003 6.31      
5 A 3074 2935 11.41      
6 A 1674 1598 36.48      
7 A 1553 1483 44.39      
8 A 1495 1428 7.18      
9 A 1480 1414 7.85      
10 A 1417 1353 1.53      
11 A 1395 1332 7.91      
12 A 1291 1232 20.79      
13 A 1224 1168 9.07      
14 A 1067 1019 2.10      
15 A 1062 1014 4.56      
16 A 1031 985 14.70      
17 A 1022 976 0.90      
18 A 955 912 7.13      
19 A 926 884 14.85      
20 A 910 869 4.37      
21 A 807 770 31.94      
22 A 667 637 0.43      
23 A 650 621 2.94      
24 A 647 617 0.30      
25 A 331 316 2.22      
26 A 252 241 2.07      
27 A 98 94 0.82      

Unscaled Zero Point Vibrational Energy (zpe) 18967.6 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 18110.3 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
0.31080 0.11983 0.08790

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 2.096 0.015 -0.000
H2 2.451 -0.525 -0.882
H3 2.538 1.011 -0.001
H4 2.451 -0.524 0.882
C5 0.618 0.112 -0.000
O6 -0.064 -1.045 0.000
N7 -1.423 -0.789 0.000
C8 -1.524 0.514 -0.000
H9 -2.508 0.962 -0.000
C10 -0.260 1.151 0.000
H11 -0.040 2.206 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.09271.08941.09271.48192.40683.60993.65434.70052.61653.0603
H21.09271.77231.76402.13172.71593.98174.20175.25133.30723.7997
H31.08941.77231.77222.12003.31644.35064.09185.04592.80182.8415
H41.09271.76401.77222.13172.71633.98194.20165.25123.30693.7992
C51.48192.13172.12002.13171.34352.23082.17873.23881.36032.1944
O62.40682.71593.31642.71631.34351.38212.13553.16192.20513.2510
N73.60993.98174.35063.98192.23081.38211.30752.06022.26233.2991
C83.65434.20174.09184.20162.17872.13551.30751.08121.41492.2501
H94.70055.25135.04595.25123.23883.16192.06021.08122.25532.7635
C102.61653.30722.80183.30691.36032.20512.26231.41492.25531.0773
H113.06033.79972.84153.79922.19443.25103.29912.25012.76351.0773

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 116.741 C1 C5 C10 133.975
H2 C1 H3 108.621 H2 C1 H4 107.636
H2 C1 C5 110.872 H3 C1 H4 108.620
H3 C1 C5 110.136 H4 C1 C5 110.873
C5 O6 N7 109.858 C5 C10 C8 103.436
C5 C10 H11 127.997 O6 C5 C10 109.284
O6 N7 C8 105.082 N7 C8 H9 118.890
N7 C8 C10 112.340 C8 C10 H11 128.566
H9 C8 C10 128.771
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 -0.414      
2 H 0.162      
3 H 0.146      
4 H 0.162      
5 C 0.359      
6 O -0.363      
7 N -0.163      
8 C 0.083      
9 H 0.141      
10 C -0.238      
11 H 0.126      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.929 2.532 0.000 3.183
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.764 -3.497 0.000
y -3.497 -34.918 0.000
z 0.000 0.000 -35.448
Traceless
 xyz
x 4.419 -3.497 0.000
y -3.497 -1.813 0.000
z 0.000 0.000 -2.606
Polar
3z2-r2-5.213
x2-y24.154
xy-3.497
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.296 -0.398 0.000
y -0.398 7.201 0.000
z 0.000 0.000 3.912


<r2> (average value of r2) Å2
<r2> 134.633
(<r2>)1/2 11.603