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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: CCSD(T)=FULL/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at CCSD(T)=FULL/6-31G*
 hartrees
Energy at 0K-187.502094
Energy at 298.15K-187.505951
HF Energy-186.867022
Nuclear repulsion energy100.987159
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(T)=FULL/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3592 3486        
2 A 3500 3398        
3 A 2380 2310        
4 A 1704 1654        
5 A 1238 1201        
6 A 823 799        
7 A 698 677        
8 A 364 353        
9 A 326 316        
10 A 186 181        
11 B 3591 3486        
12 B 3502 3400        
13 B 1703 1653        
14 B 1349 1309        
15 B 1236 1200        
16 B 761 739        
17 B 334 325        
18 B 173 168        

Unscaled Zero Point Vibrational Energy (zpe) 13730.0 cm-1
Scaled (by 0.9707) Zero Point Vibrational Energy (zpe) 13327.7 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 CCSD(T)=FULL/6-31G*
ABC
4.96447 0.11732 0.11725

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/6-31G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.052 0.607 -0.013
C2 -0.052 -0.607 -0.013
N3 0.052 1.981 -0.055
N4 -0.052 -1.981 -0.055
H5 -0.214 2.406 0.831
H6 0.940 2.366 -0.369
H7 0.214 -2.406 0.831
H8 -0.940 -2.366 -0.369

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21771.37482.58992.00522.00313.13323.1541
C21.21772.58991.37483.13323.15412.00522.0031
N31.37482.58993.96301.01801.01824.47874.4697
N42.58991.37483.96304.47874.46971.01801.0182
H52.00523.13321.01804.47871.66494.83194.9743
H62.00313.15411.01824.46971.66494.97435.0924
H73.13322.00524.47871.01804.83194.97431.6649
H83.15412.00314.46971.01824.97435.09241.6649

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.835 C1 N3 H5 113.018
C1 N3 H6 112.821 C2 C1 N3 174.835
C2 N4 H7 113.018 C2 N4 H8 112.821
H5 N3 H6 109.705 H7 N4 H8 109.705
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability