return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CHONH2 (formamide)

using model chemistry: B1B95/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Planar 1A'
Energy calculated at B1B95/CEP-31G
 hartrees
Energy at 0K-33.249912
Energy at 298.15K-33.253922
Nuclear repulsion energy39.476314
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/CEP-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' 3794 3633 35.66      
2 A' 3632 3478 38.93      
3 A' 3044 2914 110.72      
4 A' 1725 1652 425.17      
5 A' 1635 1565 37.38      
6 A' 1401 1342 13.45      
7 A' 1278 1224 109.08      
8 A' 1050 1005 4.28      
9 A' 545 522 11.62      
10 A" 1021 977 3.66      
11 A" 670 641 246.65      
12 A" 547 524 187.11      

Unscaled Zero Point Vibrational Energy (zpe) 10171.1 cm-1
Scaled (by 0.9575) Zero Point Vibrational Energy (zpe) 9738.8 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 B1B95/CEP-31G
ABC
2.35734 0.36274 0.31437

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/CEP-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.431 0.000
O2 1.233 0.208 0.000
N3 -0.972 -0.551 0.000
H4 -0.417 1.459 0.000
H5 -0.688 -1.525 0.000
H6 -1.958 -0.321 0.000

Atom - Atom Distances (Å)
  C1 O2 N3 H4 H5 H6
C11.25321.38161.10962.07362.0969
O21.25322.33202.07112.58743.2343
N31.38162.33202.08521.01461.0123
H41.10962.07112.08522.99642.3536
H52.07362.58741.01462.99641.7501
H62.09693.23431.01232.35361.7501

picture of formamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 119.051 C1 N3 H6 121.544
O2 C1 N3 124.454 O2 C1 H4 122.344
N3 C1 H4 113.202 H5 N3 H6 119.405
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.264      
2 O -0.158      
3 N -0.374      
4 H 0.165      
5 H 0.327      
6 H 0.304      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -4.583 -0.570 0.000 4.618
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.848 -0.118 0.000
y -0.118 -14.223 0.000
z 0.000 0.000 -18.888
Traceless
 xyz
x -2.292 -0.118 0.000
y -0.118 4.645 0.000
z 0.000 0.000 -2.353
Polar
3z2-r2-4.706
x2-y2-4.625
xy-0.118
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.329 0.341 0.000
y 0.341 2.946 0.000
z 0.000 0.000 1.538


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000