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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: MP2=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 MP2=FULL/cc-pVDZ
 hartrees
Energy at 0K-187.491435
Energy at 298.15K-187.495434
HF Energy-186.891417
Nuclear repulsion energy100.770671
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/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 3640 3460 17.70      
2 A 3542 3366 3.48      
3 A 2379 2261 0.15      
4 A 1645 1563 12.48      
5 A 1228 1167 0.20      
6 A 827 786 24.33      
7 A 729 693 64.70      
8 A 361 343 1.63      
9 A 306 291 38.50      
10 A 207 197 13.61      
11 B 3640 3460 16.85      
12 B 3545 3369 9.04      
13 B 1644 1562 19.15      
14 B 1357 1290 78.45      
15 B 1228 1167 0.17      
16 B 794 755 327.43      
17 B 362 344 15.32      
18 B 208 198 17.08      

Unscaled Zero Point Vibrational Energy (zpe) 13821.1 cm-1
Scaled (by 0.9504) Zero Point Vibrational Energy (zpe) 13135.6 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 MP2=FULL/cc-pVDZ
ABC
4.88095 0.11678 0.11674

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/cc-pVDZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.005 0.615 0.046
C2 -0.005 -0.615 0.046
N3 -0.005 1.975 -0.086
N4 0.005 -1.975 -0.086
H5 -0.307 2.463 0.752
H6 0.873 2.358 -0.426
H7 0.307 -2.463 0.752
H8 -0.873 -2.358 -0.426

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.23051.36632.59382.00262.00313.17283.1355
C21.23052.59381.36633.17283.13552.00262.0031
N31.36632.59383.95041.01571.01594.52744.4321
N42.59381.36633.95044.52744.43211.01571.0159
H52.00263.17281.01574.52741.67064.96424.9950
H62.00313.13551.01594.43211.67064.99505.0281
H73.17282.00264.52741.01574.96424.99501.6706
H83.13552.00314.43211.01594.99505.02811.6706

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.409 C1 N3 H5 113.621
C1 N3 H6 113.647 C2 C1 N3 174.409
C2 N4 H7 113.621 C2 N4 H8 113.647
H5 N3 H6 110.635 H7 N4 H8 110.635
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability