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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: B1B95/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 B1B95/cc-pVTZ
 hartrees
Energy at 0K-209.206740
Energy at 298.15K-209.212371
Nuclear repulsion energy122.241102
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/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 3761 3599 36.81      
2 A 3619 3464 33.71      
3 A 3166 3030 7.29      
4 A 3135 3001 12.72      
5 A 3063 2932 6.69      
6 A 1804 1727 346.95      
7 A 1614 1545 111.71      
8 A 1485 1422 10.13      
9 A 1464 1401 8.93      
10 A 1395 1335 101.57      
11 A 1346 1288 70.10      
12 A 1117 1069 0.50      
13 A 1047 1002 4.45      
14 A 979 937 7.89      
15 A 853 816 2.11      
16 A 667 638 8.43      
17 A 545 521 13.72      
18 A 519 496 5.30      
19 A 418 400 4.05      
20 A 169 161 181.62      
21 A 27 26 4.26      

Unscaled Zero Point Vibrational Energy (zpe) 16096.2 cm-1
Scaled (by 0.9571) Zero Point Vibrational Energy (zpe) 15405.7 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/cc-pVTZ
ABC
0.36465 0.31303 0.17385

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/cc-pVTZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.355 -0.328 -0.001
C2 0.077 0.147 -0.009
N3 1.015 -0.835 -0.008
O4 0.371 1.323 0.001
H5 -1.946 0.342 -0.617
H6 -1.472 -1.350 -0.355
H7 -1.737 -0.268 1.018
H8 1.981 -0.570 0.041
H9 0.774 -1.806 0.014

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.50902.42382.38911.08551.08791.08933.34572.5914
C21.50901.35841.21172.12142.18212.12502.03592.0738
N32.42381.35842.25143.24432.56332.99101.00331.0004
O42.38911.21172.25142.59153.26652.83032.48493.1540
H51.08552.12143.24432.59151.77691.75724.08543.5227
H61.08792.18212.56333.26651.77691.76803.56242.3209
H71.08932.12502.99102.83031.75721.76803.85653.1103
H83.34572.03591.00332.48494.08543.56243.85651.7280
H92.59142.07381.00043.15403.52272.32093.11031.7280

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 115.307 C1 C2 O4 122.459
C2 C1 H5 108.603 C2 C1 H6 113.339
C2 C1 H7 108.664 C2 N3 H8 118.318
C2 N3 H9 122.352 N3 C2 O4 122.228
H5 C1 H6 109.687 H5 C1 H7 107.803
H6 C1 H7 108.597 H8 N3 H9 119.174
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.360      
2 C 0.224      
3 N -0.252      
4 O -0.335      
5 H 0.139      
6 H 0.099      
7 H 0.136      
8 H 0.177      
9 H 0.172      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.116 -3.804 0.132 3.808
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.381 -2.355 0.142
y -2.355 -25.769 -0.155
z 0.142 -0.155 -24.744
Traceless
 xyz
x 4.875 -2.355 0.142
y -2.355 -3.206 -0.155
z 0.142 -0.155 -1.669
Polar
3z2-r2-3.338
x2-y25.388
xy-2.355
xz0.142
yz-0.155


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.809 -0.154 -0.001
y -0.154 5.898 -0.003
z -0.001 -0.003 3.770


<r2> (average value of r2) Å2
<r2> 74.422
(<r2>)1/2 8.627