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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: CCD/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at CCD/aug-cc-pVTZ
 hartrees
Energy at 0K-187.701108
Energy at 298.15K-187.705201
HF Energy-186.954809
Nuclear repulsion energy101.904487
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 CCD/aug-cc-pVTZ
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 3674 3516 30.40      
2 A 3584 3430 1.44      
3 A 2420 2316 0.12      
4 A 1681 1609 10.10      
5 A 1231 1178 0.74      
6 A 823 788 7.59      
7 A 641 614 102.22      
8 A 418 400 3.76      
9 A 337 323 26.78      
10 A 215 206 17.60      
11 B 3674 3516 29.56      
12 B 3585 3431 17.52      
13 B 1681 1609 32.00      
14 B 1354 1296 108.70      
15 B 1231 1178 0.72      
16 B 691 662 278.60      
17 B 417 399 16.87      
18 B 215 206 19.94      

Unscaled Zero Point Vibrational Energy (zpe) 13936.6 cm-1
Scaled (by 0.957) Zero Point Vibrational Energy (zpe) 13337.3 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 CCD/aug-cc-pVTZ
ABC
5.12997 0.11929 0.11927

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/aug-cc-pVTZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.003 0.602 0.052
C2 -0.003 -0.602 0.052
N3 -0.003 1.956 -0.085
N4 0.003 -1.956 -0.085
H5 -0.330 2.457 0.724
H6 0.853 2.345 -0.444
H7 0.330 -2.457 0.724
H8 -0.853 -2.345 -0.444

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.20311.36152.56142.00152.00183.14883.1078
C21.20312.56141.36153.14883.10782.00152.0018
N31.36152.56143.91231.00611.00624.49934.3987
N42.56141.36153.91234.49934.39871.00611.0062
H52.00153.14881.00614.49931.66594.95864.9695
H62.00183.10781.00624.39871.66594.96954.9901
H73.14882.00154.49931.00614.95864.96951.6659
H83.10782.00184.39871.00624.96954.99011.6659

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.216 C1 N3 H5 114.594
C1 N3 H6 114.610 C2 C1 N3 174.216
C2 N4 H7 114.594 C2 N4 H8 114.610
H5 N3 H6 111.766 H7 N4 H8 111.766
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability