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 C6N4 (Tetracyanoethylene)

using model chemistry: MP2/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1AG
Energy calculated at MP2/cc-pVTZ
 hartrees
Energy at 0K-446.698119
Energy at 298.15K-446.696291
HF Energy-445.036093
Nuclear repulsion energy374.733893
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 MP2/cc-pVTZ
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 2141 2033 0.00      
2 Ag 1574 1495 0.00      
3 Ag 597 567 0.00      
4 Ag 523 497 0.00      
5 Ag 111 105 0.00      
6 Au 449 426 0.00      
7 Au 78 74 0.00      
8 B1g 361 343 0.00      
9 B1u 2167 2057 46.52      
10 B1u 960 912 8.98      
11 B1u 578 549 0.19      
12 B1u 141 134 14.31      
13 B2g 706 670 0.00      
14 B2g 254 241 0.00      
15 B2u 2159 2050 90.17      
16 B2u 1170 1111 20.27      
17 B2u 416 395 0.03      
18 B2u 99 94 3.30      
19 B3g 2155 2046 0.00      
20 B3g 1299 1233 0.00      
21 B3g 510 485 0.00      
22 B3g 241 229 0.00      
23 B3u 568 540 1.76      
24 B3u 147 139 25.71      

Unscaled Zero Point Vibrational Energy (zpe) 9701.2 cm-1
Scaled (by 0.9495) Zero Point Vibrational Energy (zpe) 9211.3 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 MP2/cc-pVTZ
ABC
0.05009 0.04818 0.02456

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/cc-pVTZ

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.678
C2 0.000 0.000 -0.678
C3 0.000 1.219 1.425
C4 0.000 -1.219 1.425
C5 0.000 1.219 -1.425
C6 0.000 -1.219 -1.425
N7 0.000 2.205 2.047
N8 0.000 -2.205 2.047
N9 0.000 2.205 -2.047
N10 0.000 -2.205 -2.047

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 N7 N8 N9 N10
C11.35691.42891.42892.43072.43072.59502.59503.50583.5058
C21.35692.43072.43071.42891.42893.50583.50582.59502.5950
C31.42892.43072.43712.84963.74961.16623.47933.60954.8759
C41.42892.43072.43713.74962.84963.47931.16624.87593.6095
C52.43071.42892.84963.74962.43713.60954.87591.16623.4793
C62.43071.42893.74962.84962.43714.87593.60953.47931.1662
N72.59503.50581.16623.47933.60954.87594.40914.09496.0174
N82.59503.50583.47931.16624.87593.60954.40916.01744.0949
N93.50582.59503.60954.87591.16623.47934.09496.01744.4091
N103.50582.59504.87593.60953.47931.16626.01744.09494.4091

picture of Tetracyanoethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C5 121.486 C1 C2 C6 121.486
C1 C3 N7 179.214 C1 C4 N8 179.214
C2 C1 C3 121.486 C2 C1 C4 121.486
C2 C5 N9 179.214 C2 C6 N10 179.214
C3 C1 C4 117.027 C5 C2 C6 117.027
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability