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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: MP2=FULL/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 MP2=FULL/aug-cc-pVTZ
 hartrees
Energy at 0K-187.760628
Energy at 298.15K-187.764646
HF Energy-186.954507
Nuclear repulsion energy102.150361
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/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 3675 3496 38.98      
2 A 3584 3410 1.44      
3 A 2391 2275 0.28      
4 A 1660 1580 9.13      
5 A 1202 1144 0.28      
6 A 822 782 3.89      
7 A 593 564 112.91      
8 A 406 386 7.09      
9 A 352 335 21.12      
10 A 213 202 19.99      
11 B 3675 3496 37.82      
12 B 3586 3411 20.39      
13 B 1661 1580 31.46      
14 B 1375 1308 124.52      
15 B 1202 1143 0.31      
16 B 640 608 271.71      
17 B 402 383 15.68      
18 B 211 201 21.43      

Unscaled Zero Point Vibrational Energy (zpe) 13824.8 cm-1
Scaled (by 0.9514) Zero Point Vibrational Energy (zpe) 13152.9 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/aug-cc-pVTZ
ABC
5.18200 0.11989 0.11987

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.001 0.604 0.058
C2 -0.001 -0.604 0.058
N3 -0.001 1.950 -0.087
N4 0.001 -1.950 -0.087
H5 -0.327 2.458 0.717
H6 0.854 2.334 -0.452
H7 0.327 -2.458 0.717
H8 -0.854 -2.334 -0.452

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.20871.35332.55841.99441.99433.14923.1022
C21.20872.55841.35333.14923.10221.99441.9943
N31.35332.55843.89971.00571.00584.49254.3828
N42.55841.35333.89974.49254.38281.00571.0058
H51.99443.14921.00574.49251.66604.95884.9601
H61.99433.10221.00584.38281.66604.96014.9702
H73.14921.99444.49251.00574.95884.96011.6660
H83.10221.99434.38281.00584.96014.97021.6660

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 173.833 C1 N3 H5 114.637
C1 N3 H6 114.617 C2 C1 N3 173.833
C2 N4 H7 114.637 C2 N4 H8 114.617
H5 N3 H6 111.833 H7 N4 H8 111.833
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability