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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: CCSD/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 CCSD/6-31G*
 hartrees
Energy at 0K-208.597378
Energy at 298.15K-208.603294
HF Energy-207.973663
Nuclear repulsion energy121.254456
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/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 3728 3520 29.73      
2 A 3606 3405 32.61      
3 A 3205 3026 5.65      
4 A 3151 2975 11.57      
5 A 3081 2909 6.24      
6 A 1855 1752 282.53      
7 A 1676 1582 101.19      
8 A 1533 1448 9.11      
9 A 1529 1444 9.01      
10 A 1460 1379 87.79      
11 A 1388 1311 88.32      
12 A 1169 1104 0.42      
13 A 1088 1028 5.95      
14 A 1011 955 7.54      
15 A 875 826 1.45      
16 A 642 606 34.45      
17 A 564 532 21.44      
18 A 517 488 34.36      
19 A 427 403 15.17      
20 A 362 342 252.48      
21 A 42 40 0.23      

Unscaled Zero Point Vibrational Energy (zpe) 16453.4 cm-1
Scaled (by 0.9443) Zero Point Vibrational Energy (zpe) 15536.9 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/6-31G*
ABC
0.35734 0.30904 0.17142

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.373 -0.297 0.000
C2 0.080 0.155 0.001
N3 0.992 -0.872 -0.033
O4 0.415 1.330 0.005
H5 -2.009 0.588 -0.057
H6 -1.578 -0.953 -0.855
H7 -1.605 -0.853 0.917
H8 1.969 -0.634 0.071
H9 0.720 -1.834 0.111

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.52152.43332.41641.09161.09721.09753.35932.5988
C21.52151.37381.22082.13452.17032.16692.04832.0926
N32.43331.37382.27613.33722.69902.76471.01141.0099
O42.41641.22082.27612.53563.14953.11022.50493.1799
H51.09162.13453.33722.53561.78811.78604.16373.6528
H61.09722.17032.69903.14951.78811.77533.67972.6438
H71.09752.16692.76473.11021.78601.77533.67922.6488
H83.35932.04831.01142.50494.16373.67973.67921.7328
H92.59882.09261.00993.17993.65282.64382.64881.7328

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 114.276 C1 C2 O4 123.194
C2 C1 H5 108.423 C2 C1 H6 110.904
C2 C1 H7 110.621 C2 N3 H8 117.544
C2 N3 H9 122.036 N3 C2 O4 122.516
H5 C1 H6 109.552 H5 C1 H7 109.349
H6 C1 H7 107.976 H8 N3 H9 118.015
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability