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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: MP4=FULL/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 MP4=FULL/cc-pVDZ
 hartrees
Energy at 0K-187.541115
Energy at 298.15K-187.545022
HF Energy-186.890305
Nuclear repulsion energy100.434944
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 MP4=FULL/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 3601 3475 0.00      
2 A 3510 3387 0.00      
3 A 2333 2251 0.00      
4 A 1646 1589 0.00      
5 A 1228 1185 0.00      
6 A 824 795 0.00      
7 A 728 703 0.00      
8 A 344 332 0.00      
9 A 306 295 0.00      
10 A 188 182 0.00      
11 B 3601 3475 0.00      
12 B 3512 3389 0.00      
13 B 1644 1587 0.00      
14 B 1331 1285 0.00      
15 B 1227 1185 0.00      
16 B 807 779 0.00      
17 B 345 333 0.00      
18 B 190 183 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 13682.2 cm-1
Scaled (by 0.9651) Zero Point Vibrational Energy (zpe) 13204.7 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 MP4=FULL/cc-pVDZ
ABC
4.83552 0.11598 0.11594

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/cc-pVDZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.017 0.615 -0.003
C2 -0.017 -0.615 -0.003
N3 -0.017 1.996 -0.067
N4 0.017 -1.996 -0.067
H5 -0.262 2.401 0.838
H6 0.891 2.372 -0.346
H7 0.262 -2.401 0.838
H8 -0.891 -2.372 -0.346

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.23131.38232.61201.99341.99173.14103.1412
C21.23132.61201.38233.14103.14121.99341.9917
N31.38232.61203.99171.02181.02204.49764.4630
N42.61201.38233.99174.49764.46301.02181.0220
H51.99343.14101.02184.49761.65344.83044.9577
H61.99173.14121.02204.46301.65344.95775.0677
H73.14101.99344.49761.02184.83044.95771.6534
H83.14121.99174.46301.02204.95775.06771.6534

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 175.970 C1 N3 H5 111.146
C1 N3 H6 110.986 C2 C1 N3 175.970
C2 N4 H7 111.146 C2 N4 H8 110.986
H5 N3 H6 107.993 H7 N4 H8 107.993
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability