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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: CCSD/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/aug-cc-pVDZ
 hartrees
Energy at 0K-187.548641
Energy at 298.15K-187.552494
HF Energy-186.906248
Nuclear repulsion energy100.736961
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/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 3635 3502 21.90      
2 A 3541 3411 0.78      
3 A 2375 2288 0.05      
4 A 1655 1594 10.15      
5 A 1216 1172 0.91      
6 A 809 780 8.72      
7 A 641 617 92.46      
8 A 361 347 1.21      
9 A 333 321 32.18      
10 A 176 170 14.28      
11 B 3634 3501 21.23      
12 B 3542 3413 8.51      
13 B 1655 1595 24.88      
14 B 1335 1286 94.36      
15 B 1216 1171 0.87      
16 B 698 672 270.55      
17 B 358 345 16.10      
18 B 178 172 16.79      

Unscaled Zero Point Vibrational Energy (zpe) 13678.2 cm-1
Scaled (by 0.9634) Zero Point Vibrational Energy (zpe) 13177.6 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/aug-cc-pVDZ
ABC
5.01045 0.11649 0.11647

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.613 0.033
C2 -0.006 -0.613 0.033
N3 -0.006 1.982 -0.074
N4 0.006 -1.982 -0.074
H5 -0.333 2.472 0.752
H6 0.850 2.390 -0.437
H7 0.333 -2.472 0.752
H8 -0.850 -2.390 -0.437

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.22591.37312.59692.02212.02253.18483.1574
C21.22592.59691.37313.18483.15742.02212.0225
N31.37312.59693.96361.01481.01494.54274.4671
N42.59691.37313.96364.54274.46711.01481.0149
H52.02213.18481.01484.54271.67894.98945.0320
H62.02253.15741.01494.46711.67895.03205.0728
H73.18482.02214.54271.01484.98945.03201.6789
H83.15742.02254.46711.01495.03205.07281.6789

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 175.412 C1 N3 H5 114.913
C1 N3 H6 114.934 C2 C1 N3 175.412
C2 N4 H7 114.913 C2 N4 H8 114.934
H5 N3 H6 111.623 H7 N4 H8 111.623
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability