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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: MP2=FULL/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at MP2=FULL/6-31G*
 hartrees
Energy at 0K-187.455516
Energy at 298.15K-187.459468
HF Energy-186.867776
Nuclear repulsion energy101.271538
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 MP2=FULL/6-31G*
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 3651 3440 19.95      
2 A 3551 3346 3.66      
3 A 2410 2270 0.13      
4 A 1708 1609 16.42      
5 A 1239 1168 0.16      
6 A 830 782 16.60      
7 A 695 655 119.50      
8 A 375 353 0.00      
9 A 327 308 44.09      
10 A 206 194 11.73      
11 B 3651 3440 18.51      
12 B 3553 3348 14.30      
13 B 1707 1609 34.07      
14 B 1377 1297 72.97      
15 B 1239 1167 0.23      
16 B 749 706 414.15      
17 B 350 329 16.59      
18 B 199 187 13.31      

Unscaled Zero Point Vibrational Energy (zpe) 13907.8 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 13104.0 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 MP2=FULL/6-31G*
ABC
5.02512 0.11793 0.11787

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.609 0.038
C2 -0.006 -0.609 0.038
N3 -0.006 1.969 -0.078
N4 0.006 -1.969 -0.078
H5 -0.324 2.459 0.750
H6 0.854 2.369 -0.433
H7 0.324 -2.459 0.750
H8 -0.854 -2.369 -0.433

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21881.36422.58052.00892.00893.16543.1355
C21.21882.58051.36423.16543.13552.00892.0089
N31.36422.58053.93711.01331.01354.51604.4335
N42.58051.36423.93714.51604.43351.01331.0135
H52.00893.16541.01334.51601.67244.95974.9982
H62.00893.13551.01354.43351.67244.99825.0360
H73.16542.00894.51601.01334.95974.99821.6724
H83.13552.00894.43351.01354.99825.03601.6724

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.985 C1 N3 H5 114.537
C1 N3 H6 114.520 C2 C1 N3 174.985
C2 N4 H7 114.537 C2 N4 H8 114.520
H5 N3 H6 111.209 H7 N4 H8 111.209
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability