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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: CCSD(T)=FULL/aug-cc-pVDZ

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/aug-cc-pVDZ
 hartrees
Energy at 0K-187.585308
Energy at 298.15K-187.589034
HF Energy-186.905039
Nuclear repulsion energy100.520825
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/aug-cc-pVDZ
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 3605 3501        
2 A 3509 3408        
3 A 2332 2264        
4 A 1640 1593        
5 A 1203 1169        
6 A 800 777        
7 A 635 617        
8 A 341 331        
9 A 327 317        
10 A 156 152        
11 B 3605 3501        
12 B 3511 3410        
13 B 1640 1593        
14 B 1324 1286        
15 B 1202 1168        
16 B 694 674        
17 B 335 326        
18 B 158 154        

Unscaled Zero Point Vibrational Energy (zpe) 13508.4 cm-1
Scaled (by 0.9712) Zero Point Vibrational Energy (zpe) 13119.4 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/aug-cc-pVDZ
ABC
4.98604 0.11598 0.11596

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/aug-cc-pVDZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.040 0.614 -0.003
C2 -0.040 -0.614 -0.003
N3 0.040 1.991 -0.059
N4 -0.040 -1.991 -0.059
H5 -0.245 2.430 0.814
H6 0.926 2.380 -0.377
H7 0.245 -2.430 0.814
H8 -0.926 -2.380 -0.377

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.23001.37882.60692.01222.01083.15853.1673
C21.23002.60691.37883.15853.16732.01222.0108
N31.37882.60693.98351.01811.01824.51174.4876
N42.60691.37883.98354.51174.48761.01811.0182
H52.01223.15851.01814.51171.67094.88515.0016
H62.01083.16731.01824.48761.67095.00165.1067
H73.15852.01224.51171.01814.88515.00161.6709
H83.16732.01084.48761.01825.00165.10671.6709

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 175.634 C1 N3 H5 113.318
C1 N3 H6 113.188 C2 C1 N3 175.634
C2 N4 H7 113.318 C2 N4 H8 113.188
H5 N3 H6 110.282 H7 N4 H8 110.282
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability