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 CH3CONH2 (Acetamide)

using model chemistry: B3PW91/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at B3PW91/aug-cc-pVTZ
 hartrees
Energy at 0K-209.223806
Energy at 298.15K-209.229507
HF Energy-209.223806
Nuclear repulsion energy121.973196
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 B3PW91/aug-cc-pVTZ
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 3748 3617 38.61      
2 A 3609 3483 33.68      
3 A 3138 3028 10.31      
4 A 3134 3024 7.84      
5 A 3055 2948 7.08      
6 A 1776 1714 382.33      
7 A 1617 1561 102.30      
8 A 1485 1433 11.20      
9 A 1464 1413 7.73      
10 A 1392 1343 79.94      
11 A 1345 1298 102.80      
12 A 1117 1078 0.25      
13 A 1049 1012 3.61      
14 A 982 948 8.89      
15 A 849 820 2.28      
16 A 672 648 8.23      
17 A 544 525 13.24      
18 A 526 507 5.69      
19 A 429 414 4.78      
20 A 209 202 184.00      
21 A 23 22 2.85      

Unscaled Zero Point Vibrational Energy (zpe) 16080.2 cm-1
Scaled (by 0.9651) Zero Point Vibrational Energy (zpe) 15519.0 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 B3PW91/aug-cc-pVTZ
ABC
0.36445 0.31057 0.17304

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/aug-cc-pVTZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.368 -0.297 -0.000
C2 0.079 0.154 0.002
N3 0.993 -0.861 -0.029
O4 0.409 1.320 0.004
H5 -2.008 0.578 -0.060
H6 -1.570 -0.954 -0.848
H7 -1.598 -0.850 0.913
H8 1.965 -0.623 0.063
H9 0.723 -1.820 0.097

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.51572.42702.40221.08601.09181.09203.34962.5885
C21.51571.36591.21142.13042.16142.15702.04092.0782
N32.42701.36592.25793.32782.69232.75691.00561.0034
O42.40221.21142.25792.52843.13273.09242.49023.1563
H51.08602.13043.32782.52841.77801.77604.15243.6376
H61.09182.16142.69233.13271.77801.76443.66632.6275
H71.09202.15702.75693.09241.77601.76443.67052.6450
H83.34962.04091.00562.49024.15243.66633.67051.7247
H92.58852.07821.00343.15633.63762.62752.64501.7247

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 114.656 C1 C2 O4 123.107
C2 C1 H5 108.818 C2 C1 H6 110.929
C2 C1 H7 110.564 C2 N3 H8 117.964
C2 N3 H9 121.841 N3 C2 O4 122.223
H5 C1 H6 109.457 H5 C1 H7 109.258
H6 C1 H7 107.791 H8 N3 H9 118.292
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.504      
2 C 0.610      
3 N -0.177      
4 O -0.684      
5 H 0.203      
6 H 0.221      
7 H 0.200      
8 H 0.082      
9 H 0.049      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.142 -3.878 0.010 3.881
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.397 -2.309 0.012
y -2.309 -26.368 -0.009
z 0.012 -0.009 -25.018
Traceless
 xyz
x 5.296 -2.309 0.012
y -2.309 -3.660 -0.009
z 0.012 -0.009 -1.636
Polar
3z2-r2-3.272
x2-y25.970
xy-2.309
xz0.012
yz-0.009


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.491 -0.200 -0.004
y -0.200 6.574 -0.001
z -0.004 -0.001 4.471


<r2> (average value of r2) Å2
<r2> 74.905
(<r2>)1/2 8.655