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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: MP2=FULL/3-21G

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=FULL/3-21G
 hartrees
Energy at 0K-207.230489
Energy at 298.15K-207.236575
HF Energy-206.812280
Nuclear repulsion energy119.957842
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=FULL/3-21G
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 3708 3541 29.15      
2 A 3569 3408 35.48      
3 A 3209 3064 5.74      
4 A 3164 3021 12.01      
5 A 3097 2957 5.28      
6 A 1744 1665 200.34      
7 A 1703 1626 30.21      
8 A 1591 1519 8.87      
9 A 1576 1505 16.65      
10 A 1462 1396 23.23      
11 A 1348 1287 182.58      
12 A 1150 1098 0.37      
13 A 1113 1062 7.92      
14 A 1014 968 15.48      
15 A 813 776 2.34      
16 A 661 631 45.55      
17 A 546 521 10.75      
18 A 541 516 43.34      
19 A 420 401 2.62      
20 A 388 370 267.70      
21 A 112 107 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 16463.9 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 15719.7 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 MP2=FULL/3-21G
ABC
0.34393 0.30667 0.16726

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.394 -0.251 0.000
C2 -0.088 0.154 -0.000
N3 -0.950 -0.926 -0.000
O4 -0.483 1.341 -0.000
H5 1.990 0.662 -0.000
H6 1.629 -0.843 0.891
H7 1.629 -0.844 -0.890
H8 -1.947 -0.751 0.000
H9 -0.621 -1.881 -0.000

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.53632.43882.46071.09051.09501.09503.37782.5917
C21.53631.38211.25032.13912.17652.17652.06752.1043
N32.43881.38212.31473.34132.72972.72941.01241.0099
O42.46071.25032.31472.56413.16573.16602.55333.2249
H51.09052.13913.34132.56411.78571.78574.18263.6449
H61.09502.17652.72973.16571.78571.78113.68642.6337
H71.09502.17652.72943.16601.78571.78113.68632.6330
H83.37782.06751.01242.55334.18263.68643.68631.7420
H92.59172.10431.00993.22493.64492.63372.63301.7420

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 113.261 C1 C2 O4 123.702
C2 C1 H5 107.836 C2 C1 H6 110.491
C2 C1 H7 110.492 C2 N3 H8 118.597
C2 N3 H9 122.448 N3 C2 O4 123.037
H5 C1 H6 109.587 H5 C1 H7 109.586
H6 C1 H7 108.836 H8 N3 H9 118.955
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability