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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: CCSD(T)/6-311G*

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)/6-311G*
 hartrees
Energy at 0K-187.562321
Energy at 298.15K-187.566270
HF Energy-186.913897
Nuclear repulsion energy101.199830
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)/6-311G*
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 3628 3493        
2 A 3540 3408        
3 A 2353 2265        
4 A 1724 1660        
5 A 1249 1203        
6 A 816 786        
7 A 702 676        
8 A 374 360        
9 A 344 331        
10 A 182 175        
11 B 3628 3493        
12 B 3542 3409        
13 B 1724 1659        
14 B 1343 1292        
15 B 1248 1201        
16 B 769 741        
17 B 366 352        
18 B 181 174        

Unscaled Zero Point Vibrational Energy (zpe) 13856.1 cm-1
Scaled (by 0.9626) Zero Point Vibrational Energy (zpe) 13337.9 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)/6-311G*
ABC
5.02554 0.11763 0.11760

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/6-311G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.039 0.607 -0.004
C2 -0.039 -0.607 -0.004
N3 0.039 1.978 -0.059
N4 -0.039 -1.978 -0.059
H5 -0.245 2.412 0.811
H6 0.920 2.361 -0.379
H7 0.245 -2.412 0.811
H8 -0.920 -2.361 -0.379

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21681.37222.58722.00001.99803.13353.1413
C21.21682.58721.37223.13353.14132.00001.9980
N31.37222.58723.95731.01231.01244.47994.4551
N42.58721.37223.95734.47994.45511.01231.0124
H52.00003.13351.01234.47991.66614.84794.9645
H61.99803.14131.01244.45511.66614.96455.0670
H73.13352.00004.47991.01234.84794.96451.6661
H83.14131.99804.45511.01244.96455.06701.6661

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 175.679 C1 N3 H5 113.157
C1 N3 H6 112.961 C2 C1 N3 175.679
C2 N4 H7 113.157 C2 N4 H8 112.961
H5 N3 H6 110.749 H7 N4 H8 110.749
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability