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-33.301619
Energy at 298.15K-33.305098
Nuclear repulsion energy39.856892
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' 3773 3612 46.96      
2 A' 3628 3473 43.62      
3 A' 2998 2870 115.23      
4 A' 1845 1766 463.04      
5 A' 1611 1542 71.74      
6 A' 1406 1346 3.24      
7 A' 1267 1213 102.81      
8 A' 1027 983 3.23      
9 A' 546 522 10.14      
10 A" 1028 984 4.27      
11 A" 635 608 17.89      
12 A" 111 106 285.62      

Unscaled Zero Point Vibrational Energy (zpe) 9936.7 cm-1
Scaled (by 0.9572) Zero Point Vibrational Energy (zpe) 9511.4 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
2.40861 0.37050 0.32111

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 0.424 0.000
O2 1.211 0.237 0.000
N3 -0.949 -0.570 0.000
H4 -0.456 1.443 0.000
H5 -0.649 -1.540 0.000
H6 -1.939 -0.358 0.000

Atom - Atom Distances (Å)
  C1 O2 N3 H4 H5 H6
C11.22521.37431.11562.06822.0909
O21.22522.30562.05672.57183.2057
N31.37432.30562.07191.01521.0127
H41.11562.05672.07192.98832.3327
H52.06822.57181.01522.98831.7500
H62.09093.20571.01272.33271.7500

picture of formamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 119.118 C1 N3 H6 121.578
O2 C1 N3 124.887 O2 C1 H4 122.894
N3 C1 H4 112.220 H5 N3 H6 119.303
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 -0.320      
2 O -0.134      
3 N -0.357      
4 H 0.158      
5 H 0.337      
6 H 0.316      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -4.109 -0.741 0.000 4.176
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.777 -0.148 0.000
y -0.148 -14.176 0.000
z 0.000 0.000 -18.656
Traceless
 xyz
x -1.360 -0.148 0.000
y -0.148 4.041 0.000
z 0.000 0.000 -2.680
Polar
3z2-r2-5.361
x2-y2-3.601
xy-0.148
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.213 0.351 0.000
y 0.351 3.149 0.000
z 0.000 0.000 1.765


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