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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: MP2/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at MP2/aug-cc-pVDZ
 hartrees
Energy at 0K-208.669663
Energy at 298.15K-208.675199
Nuclear repulsion energy120.831666
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 MP2/aug-cc-pVDZ
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 3766 3611 47.53      
2 A 3609 3462 45.19      
3 A 3203 3071 4.78      
4 A 3166 3036 9.54      
5 A 3077 2951 6.95      
6 A 1749 1677 348.02      
7 A 1623 1557 89.42      
8 A 1480 1419 9.64      
9 A 1463 1403 9.58      
10 A 1400 1343 110.61      
11 A 1337 1282 64.66      
12 A 1111 1065 0.54      
13 A 1043 1000 1.53      
14 A 978 938 11.93      
15 A 861 826 1.47      
16 A 645 618 5.87      
17 A 544 522 14.52      
18 A 519 497 6.55      
19 A 421 403 3.42      
20 A 93 89 187.59      
21 A 48 46 6.92      

Unscaled Zero Point Vibrational Energy (zpe) 16066.5 cm-1
Scaled (by 0.959) Zero Point Vibrational Energy (zpe) 15407.8 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 MP2/aug-cc-pVDZ
ABC
0.35478 0.30743 0.17004

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pVDZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.373 -0.315 -0.000
C2 0.074 0.148 -0.010
N3 1.012 -0.858 -0.012
O4 0.396 1.338 0.002
H5 -1.992 0.458 -0.470
H6 -1.509 -1.274 -0.523
H7 -1.699 -0.437 1.045
H8 1.988 -0.603 0.057
H9 0.752 -1.833 0.022

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.51922.44512.42111.09701.10051.10153.37382.6109
C21.51921.37491.23302.13942.18882.14482.05742.0937
N32.44511.37492.28083.31122.60522.93961.01201.0094
O42.42111.23302.28082.58813.27512.93762.51143.1910
H51.09702.13943.31122.58811.79921.78444.15313.6085
H61.10052.18882.60523.27511.79921.78773.60802.3920
H71.10152.14482.93962.93761.78441.78773.82123.0002
H83.37382.05741.01202.51144.15313.60803.82121.7442
H92.61092.09371.00943.19103.60852.39203.00021.7442

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 115.224 C1 C2 O4 122.876
C2 C1 H5 108.642 C2 C1 H6 112.354
C2 C1 H7 108.804 C2 N3 H8 118.277
C2 N3 H9 122.088 N3 C2 O4 121.892
H5 C1 H6 109.912 H5 C1 H7 108.505
H6 C1 H7 108.546 H8 N3 H9 119.290
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability