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 C4H2N2 (Fumaronitrile)

using model chemistry: B2PLYP=FULL/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at B2PLYP=FULL/6-311G*
 hartrees
Energy at 0K-262.920035
Energy at 298.15K-262.921152
HF Energy-262.598753
Nuclear repulsion energy162.049147
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 B2PLYP=FULL/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Ag 3215 3215 0.00      
2 Ag 2265 2265 0.00      
3 Ag 1671 1671 0.00      
4 Ag 1338 1338 0.00      
5 Ag 1030 1030 0.00      
6 Ag 537 537 0.00      
7 Ag 257 257 0.00      
8 Au 982 982 55.78      
9 Au 558 558 2.74      
10 Au 127 127 14.78      
11 Bg 861 861 0.00      
12 Bg 387 387 0.00      
13 Bu 3221 3221 4.07      
14 Bu 2281 2281 0.47      
15 Bu 1311 1311 2.07      
16 Bu 1025 1025 7.55      
17 Bu 540 540 0.89      
18 Bu 138 138 17.66      

Unscaled Zero Point Vibrational Energy (zpe) 10871.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 10871.7 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 B2PLYP=FULL/6-311G*
ABC
1.55559 0.04941 0.04789

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-311G*

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.336 0.583 0.000
C2 0.336 -0.583 0.000
C3 0.336 1.840 0.000
C4 -0.336 -1.840 0.000
N5 0.867 2.874 0.000
N6 -0.867 -2.874 0.000
H7 -1.419 0.604 0.000
H8 1.419 -0.604 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8
C11.34521.42492.42252.58783.49781.08402.1185
C21.34522.42251.42493.49782.58782.11851.0840
C31.42492.42253.74011.16304.86502.14672.6728
C42.42251.42493.74014.86501.16302.67282.1467
N52.58783.49781.16304.86506.00443.22223.5217
N63.49782.58784.86501.16306.00443.52173.2222
H71.08402.11852.14672.67283.22223.52173.0848
H82.11851.08402.67282.14673.52173.22223.0848

picture of Fumaronitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 121.955 C1 C2 H8 121.034
C1 C3 N5 179.053 C2 C1 C3 121.955
C2 C1 H7 121.034 C2 C4 N6 179.053
C3 C1 H7 117.011 C4 C2 H8 117.011
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability