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 C3H3N (acrylonitrile)

using model chemistry: B3LYP/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/3-21G*
 hartrees
Energy at 0K-169.893885
Energy at 298.15K-169.896416
Nuclear repulsion energy89.997446
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 B3LYP/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' 3264 3140 2.83      
2 A' 3183 3062 1.11      
3 A' 3175 3054 0.30      
4 A' 2335 2246 2.87      
5 A' 1685 1621 1.09      
6 A' 1499 1442 6.77      
7 A' 1364 1312 0.03      
8 A' 1151 1107 4.91      
9 A' 889 855 1.03      
10 A' 625 601 0.11      
11 A' 268 258 1.31      
12 A" 1029 990 9.10      
13 A" 1006 968 62.11      
14 A" 768 739 12.17      
15 A" 402 387 0.27      

Unscaled Zero Point Vibrational Energy (zpe) 11320.6 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 10890.4 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 B3LYP/3-21G*
ABC
1.69054 0.16487 0.15022

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.584 -0.528 0.000
N2 -1.067 -1.589 0.000
C3 0.000 0.770 0.000
H4 -0.698 1.603 0.000
C5 1.320 0.984 0.000
H6 2.032 0.167 0.000
H7 1.720 1.992 0.000

Atom - Atom Distances (Å)
  C1 N2 C3 H4 C5 H6 H7
C11.16621.42332.13352.43162.70703.4141
N21.16622.58953.21353.51023.56204.5376
C31.42332.58951.08631.33742.11982.1095
H42.13353.21351.08632.11053.08452.4486
C52.43163.51021.33742.11051.08401.0839
H62.70703.56202.11983.08451.08401.8515
H73.41414.53762.10952.44861.08391.8515

picture of acrylonitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 H4 115.801 C1 C3 C5 123.451
N2 C1 C3 179.795 C3 C5 H6 121.841
C3 C5 H7 120.848 H4 C3 C5 120.748
H6 C5 H7 117.311
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.288      
2 N -0.473      
3 C -0.171      
4 H 0.244      
5 C -0.324      
6 H 0.221      
7 H 0.215      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.842 3.133 0.000 3.635
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.986 -2.592 0.000
y -2.592 -25.268 0.000
z 0.000 0.000 -24.570
Traceless
 xyz
x 2.933 -2.592 0.000
y -2.592 -1.990 0.000
z 0.000 0.000 -0.942
Polar
3z2-r2-1.885
x2-y23.282
xy-2.592
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.863 1.889 0.000
y 1.889 5.801 0.000
z 0.000 0.000 1.648


<r2> (average value of r2) Å2
<r2> 78.289
(<r2>)1/2 8.848