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All results from a given calculation for HCCCN (Cyanoacetylene)

using model chemistry: B3LYP/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 1Σ
Energy calculated at B3LYP/6-31+G**
 hartrees
Energy at 0K-169.583220
Energy at 298.15K-169.582671
Nuclear repulsion energy76.710564
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/6-31+G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σ 3472 3348 90.97      
2 Σ 2375 2290 29.53      
3 Σ 2174 2097 0.07      
4 Σ 909 876 0.00      
5 Π 707 682 43.34      
5 Π 707 682 43.34      
6 Π 633 610 18.37      
6 Π 633 610 18.37      
7 Π 265 255 0.11      
7 Π 265 255 0.11      

Unscaled Zero Point Vibrational Energy (zpe) 6069.9 cm-1
Scaled (by 0.9642) Zero Point Vibrational Energy (zpe) 5852.6 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/6-31+G**
B
0.15123

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31+G**

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.906
C2 0.000 0.000 0.740
C3 0.000 0.000 -0.634
C4 0.000 0.000 -1.845
H5 0.000 0.000 -2.912

Atom - Atom Distances (Å)
  N1 C2 C3 C4 H5
N11.16672.53973.75074.8184
C21.16671.37302.58413.6518
C32.53971.37301.21102.2788
C43.75072.58411.21101.0677
H54.81843.65182.27881.0677

picture of Cyanoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 C3 180.000 C2 C3 C4 180.000
C3 C4 H5 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.638      
2 C -0.871      
3 C 1.169      
4 C 0.086      
5 H 0.254      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -3.962 3.962
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.950 0.000 0.000
y 0.000 -22.950 0.000
z 0.000 0.000 -21.201
Traceless
 xyz
x -0.874 0.000 0.000
y 0.000 -0.874 0.000
z 0.000 0.000 1.749
Polar
3z2-r23.497
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.745 0.000 0.000
y 0.000 2.745 0.000
z 0.000 0.000 10.638


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