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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: CCSD(T)/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)/aug-cc-pVDZ
 hartrees
Energy at 0K-187.574487
Energy at 298.15K-187.578183
HF Energy-186.904637
Nuclear repulsion energy100.417673
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)/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 3600 3465        
2 A 3505 3374        
3 A 2327 2240        
4 A 1639 1577        
5 A 1204 1158        
6 A 798 768        
7 A 640 616        
8 A 338 325        
9 A 323 310        
10 A 151 145        
11 B 3599 3465        
12 B 3507 3375        
13 B 1638 1577        
14 B 1319 1269        
15 B 1203 1158        
16 B 700 674        
17 B 329 317        
18 B 152 146        

Unscaled Zero Point Vibrational Energy (zpe) 13485.3 cm-1
Scaled (by 0.9625) Zero Point Vibrational Energy (zpe) 12979.6 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)/aug-cc-pVDZ
ABC
4.97103 0.11575 0.11572

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.044 0.614 -0.005
C2 -0.044 -0.614 -0.005
N3 0.044 1.994 -0.059
N4 -0.044 -1.994 -0.059
H5 -0.238 2.430 0.817
H6 0.933 2.381 -0.374
H7 0.238 -2.430 0.817
H8 -0.933 -2.381 -0.374

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.23081.38082.60942.01332.01193.15863.1715
C21.23082.60941.38083.15863.17152.01332.0119
N31.38082.60943.98811.01891.01904.51354.4932
N42.60941.38083.98814.51354.49321.01891.0190
H52.01333.15861.01894.51351.67094.88275.0043
H62.01193.17151.01904.49321.67095.00435.1140
H73.15862.01334.51351.01894.88275.00431.6709
H83.17152.01194.49321.01905.00435.11401.6709

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 175.300 C1 N3 H5 113.198
C1 N3 H6 113.074 C2 C1 N3 175.300
C2 N4 H7 113.198 C2 N4 H8 113.074
H5 N3 H6 110.149 H7 N4 H8 110.149
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability