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All results from a given calculation for HNCCNH (Ethenediimine)

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

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1AG
Energy calculated at CCSD/6-31+G**
 hartrees
Energy at 0K-186.295908
Energy at 298.15K 
HF Energy-185.684837
Nuclear repulsion energy88.884438
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 CCSD/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 Ag 3496 3264 0.00      
2 Ag 2094 1955 0.00      
3 Ag 1201 1121 0.00      
4 Ag 932 870 0.00      
5 Ag 343 321 0.00      
6 Au 961 897 135.53      
7 Au 243 227 0.00      
8 Bg 704 657 0.00      
9 Bu 3496 3265 13.05      
10 Bu 1747 1632 156.38      
11 Bu 1163 1086 395.62      
12 Bu 280 262 7.13      

Unscaled Zero Point Vibrational Energy (zpe) 8330.3 cm-1
Scaled (by 0.9338) Zero Point Vibrational Energy (zpe) 7778.8 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 CCSD/6-31+G**
ABC
7.91251 0.14162 0.13913

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.310 -0.585 0.000
C2 -0.310 0.585 0.000
N3 0.310 -1.841 0.000
N4 -0.310 1.841 0.000
H5 1.263 -2.212 0.000
H6 -1.263 2.212 0.000

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6
C11.32351.25592.50341.88593.2087
C21.32352.50341.25593.20871.8859
N31.25592.50343.73321.02314.3472
N42.50341.25593.73324.34721.0231
H51.88593.20871.02314.34725.0945
H63.20871.88594.34721.02315.0945

picture of Ethenediimine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 152.099 C1 N3 H5 111.281
C2 C1 N3 152.099 C2 N4 H6 111.281
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability