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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: CCSD/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 CCSD/cc-pVTZ
 hartrees
Energy at 0K-208.856846
Energy at 298.15K-208.862713
HF Energy-208.060164
Nuclear repulsion energy121.969922
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 CCSD/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 3774 3552 36.98      
2 A 3641 3427 38.07      
3 A 3186 2999 5.85      
4 A 3141 2957 11.15      
5 A 3071 2891 6.07      
6 A 1833 1725 324.78      
7 A 1650 1553 95.95      
8 A 1510 1421 7.42      
9 A 1495 1407 9.10      
10 A 1431 1347 95.50      
11 A 1362 1282 81.76      
12 A 1150 1083 0.26      
13 A 1074 1011 3.29      
14 A 996 938 10.54      
15 A 867 816 2.03      
16 A 646 608 13.48      
17 A 564 530 19.80      
18 A 516 486 7.35      
19 A 422 397 4.71      
20 A 282 265 217.42      
21 A 54 51 1.71      

Unscaled Zero Point Vibrational Energy (zpe) 16332.9 cm-1
Scaled (by 0.9412) Zero Point Vibrational Energy (zpe) 15372.6 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 CCSD/cc-pVTZ
ABC
0.36166 0.31217 0.17316

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.366 -0.299 0.000
C2 0.080 0.156 0.001
N3 0.991 -0.863 -0.032
O4 0.407 1.322 0.004
H5 -2.006 0.575 -0.058
H6 -1.562 -0.955 -0.848
H7 -1.589 -0.853 0.912
H8 1.960 -0.626 0.071
H9 0.716 -1.815 0.107

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.51552.42362.40131.08471.09041.09053.34242.5779
C21.51551.36741.21042.12862.15692.15272.03732.0739
N32.42361.36742.26173.32432.68212.74781.00281.0006
O42.40131.21042.26172.52653.12813.08792.49213.1535
H51.08472.12863.32432.52651.77791.77574.14593.6263
H61.09042.15692.68213.12811.77791.76393.65512.6163
H71.09052.15272.74783.08791.77571.76393.65442.6249
H83.34242.03731.00282.49214.14593.65513.65441.7209
H92.57792.07391.00063.15353.62632.61632.62491.7209

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 114.327 C1 C2 O4 123.115
C2 C1 H5 108.765 C2 C1 H6 110.674
C2 C1 H7 110.327 C2 N3 H8 117.717
C2 N3 H9 121.515 N3 C2 O4 122.543
H5 C1 H6 109.650 H5 C1 H7 109.446
H6 C1 H7 107.964 H8 N3 H9 118.405
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability