return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C4H7NO (Oxazole, 4,5-dihydro-2-methyl-)

using model chemistry: B3LYP/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at B3LYP/3-21G*
 hartrees
Energy at 0K-285.022645
Energy at 298.15K-285.031530
Nuclear repulsion energy237.273378
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/3-21G*
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 3179 3059 3.94      
2 A 3097 2979 32.11      
3 A 3086 2969 30.45      
4 A 3071 2954 6.12      
5 A 1703 1638 91.05      
6 A 1572 1512 0.65      
7 A 1550 1491 1.47      
8 A 1538 1479 14.54      
9 A 1457 1401 17.37      
10 A 1363 1311 12.70      
11 A 1324 1273 2.16      
12 A 1229 1183 103.26      
13 A 1083 1041 2.41      
14 A 948 912 45.76      
15 A 917 882 2.54      
16 A 889 856 46.82      
17 A 861 829 21.51      
18 A 742 713 9.78      
19 A 649 624 2.99      
20 A 326 314 5.38      
21 A 3152 3032 37.66      
22 A 3123 3004 1.03      
23 A 3120 3002 7.14      
24 A 1543 1485 10.78      
25 A 1277 1228 0.13      
26 A 1201 1156 0.20      
27 A 1117 1074 4.10      
28 A 1093 1052 1.81      
29 A 833 801 0.01      
30 A 574 552 4.94      
31 A 234 225 13.12      
32 A 139 134 1.83      
33 A 123 118 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24054.4 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 23140.4 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/3-21G*
ABC
0.25119 0.11075 0.08038

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.366 2.149 0.000
C2 0.527 -1.549 0.000
C3 -1.020 -1.304 0.000
N4 -1.175 0.200 0.000
O5 1.107 -0.171 0.000
C6 0.000 0.702 0.000
H7 0.878 -2.062 0.897
H8 0.878 -2.062 -0.897
H9 -1.506 -1.710 0.890
H10 -1.506 -1.710 -0.890
H11 0.969 2.380 0.884
H12 0.969 2.380 -0.884
H13 -0.542 2.751 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 C6 H7 H8 H9 H10 H11 H12 H13
C13.70133.72082.48502.43521.49264.33584.33584.38084.38081.09501.09501.0897
C23.70131.56632.44031.49512.31161.09111.09112.22472.22474.05134.05134.4305
C33.72081.56631.51172.41002.25052.23192.23191.09241.09244.27904.27904.0827
N42.48502.44031.51172.31221.27823.18373.18372.13332.13333.18343.18342.6283
O52.43521.49512.41002.31221.40952.10552.10553.16033.16032.70332.70333.3550
C61.49262.31162.25051.27821.40953.03563.03562.97982.97982.13002.13002.1194
H74.33581.09112.23193.18372.10553.03561.79322.40922.99954.44304.78675.0975
H84.33581.09112.23193.18372.10553.03561.79322.99952.40924.78674.44305.0975
H94.38082.22471.09242.13333.16032.97982.40922.99951.78044.78085.09954.6501
H104.38082.22471.09242.13333.16032.97982.99952.40921.78045.09954.78084.6501
H111.09504.05134.27903.18342.70332.13004.44304.78674.78085.09951.76881.7900
H121.09504.05134.27903.18342.70332.13004.78674.44305.09954.78081.76881.7900
H131.08974.43054.08272.62833.35502.11945.09755.09754.65014.65011.79001.7900

picture of Oxazole, 4,5-dihydro-2-methyl- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C6 N4 127.328 C1 C6 O5 114.063
C2 C3 N4 104.888 C2 C3 H9 112.372
C2 C3 H10 112.372 C2 O5 C6 105.431
C3 C2 O5 103.832 C3 C2 H7 113.034
C3 C2 H8 113.034 C3 N4 C6 107.240
N4 C3 H9 108.944 N4 C3 H10 108.944
N4 C6 O5 118.609 O5 C2 H7 107.985
O5 C2 H8 107.985 C6 C1 H11 109.849
C6 C1 H12 109.849 C6 C1 H13 109.327
H7 C2 H8 110.514 H9 C3 H10 109.156
H11 C1 H12 107.734 H11 C1 H13 110.032
H12 C1 H13 110.032
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.608      
2 C -0.185      
3 C -0.305      
4 N -0.482      
5 O -0.485      
6 C 0.523      
7 H 0.212      
8 H 0.212      
9 H 0.219      
10 H 0.219      
11 H 0.225      
12 H 0.225      
13 H 0.229      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.671 -1.097 0.000 1.286
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -41.168 2.188 0.000
y 2.188 -28.852 0.000
z 0.000 0.000 -35.217
Traceless
 xyz
x -9.133 2.188 0.000
y 2.188 9.341 0.000
z 0.000 0.000 -0.208
Polar
3z2-r2-0.415
x2-y2-12.316
xy2.188
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.840 0.661 0.000
y 0.661 8.498 0.000
z 0.000 0.000 5.019


<r2> (average value of r2) Å2
<r2> 152.123
(<r2>)1/2 12.334