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 C3H2N2 (Malononitrile)

using model chemistry: mPW1PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/3-21G*
 hartrees
Energy at 0K-223.674283
Energy at 298.15K-223.676301
Nuclear repulsion energy124.904970
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 mPW1PW91/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3081 2926 1.50      
2 A1 2395 2274 0.01      
3 A1 1501 1425 26.67      
4 A1 927 880 5.85      
5 A1 639 606 0.07      
6 A1 174 165 7.10      
7 A2 1335 1268 0.00      
8 A2 466 442 0.00      
9 B1 3122 2965 5.19      
10 B1 982 933 0.97      
11 B1 423 402 0.79      
12 B2 2390 2269 0.33      
13 B2 1398 1328 0.85      
14 B2 1011 960 9.43      
15 B2 461 438 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 10151.8 cm-1
Scaled (by 0.9496) Zero Point Vibrational Energy (zpe) 9640.2 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 mPW1PW91/3-21G*
ABC
0.68003 0.09912 0.08794

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.846
C2 0.000 1.211 0.033
C3 0.000 -1.211 0.033
H4 0.886 0.000 1.494
H5 -0.886 0.000 1.494
N6 0.000 2.182 -0.604
N7 0.000 -2.182 -0.604

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 N6 N7
C11.45871.45871.09811.09812.61952.6195
C21.45872.42252.09472.09471.16093.4521
C31.45872.42252.09472.09473.45211.1609
H41.09812.09472.09471.77243.15413.1541
H51.09812.09472.09471.77243.15413.1541
N62.61951.16093.45213.15413.15414.3630
N72.61953.45211.16093.15413.15414.3630

picture of Malononitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N6 179.441 C1 C3 N7 179.441
C2 C1 C3 112.277 C2 C1 H4 109.210
C2 C1 H5 109.210 C3 C1 H4 109.210
C3 C1 H5 109.210 H4 C1 H5 107.610
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.574      
2 C 0.407      
3 C 0.407      
4 H 0.340      
5 H 0.340      
6 N -0.460      
7 N -0.460      


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 3.668 3.668
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.514 0.000 0.000
y 0.000 -41.194 0.000
z 0.000 0.000 -26.600
Traceless
 xyz
x 7.383 0.000 0.000
y 0.000 -14.637 0.000
z 0.000 0.000 7.255
Polar
3z2-r214.509
x2-y214.680
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.885 0.000 0.000
y 0.000 6.411 0.000
z 0.000 0.000 4.160


<r2> (average value of r2) Å2
<r2> 119.268
(<r2>)1/2 10.921