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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: B2PLYP=FULL/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 B2PLYP=FULL/aug-cc-pVDZ
 hartrees
Energy at 0K-187.884515
Energy at 298.15K-187.888320
HF Energy-187.675705
Nuclear repulsion energy101.376191
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 B2PLYP=FULL/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 3636 3497 27.08      
2 A 3540 3405 0.82      
3 A 2357 2267 0.11      
4 A 1642 1580 7.88      
5 A 1193 1147 0.30      
6 A 817 786 2.70      
7 A 547 526 119.46      
8 A 386 371 10.90      
9 A 373 359 15.90      
10 A 168 161 18.65      
11 B 3636 3497 26.30      
12 B 3543 3407 7.43      
13 B 1643 1580 24.73      
14 B 1365 1312 118.73      
15 B 1193 1147 0.28      
16 B 602 579 271.78      
17 B 374 359 15.78      
18 B 169 162 20.56      

Unscaled Zero Point Vibrational Energy (zpe) 13589.8 cm-1
Scaled (by 0.9618) Zero Point Vibrational Energy (zpe) 13070.6 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 B2PLYP=FULL/aug-cc-pVDZ
ABC
5.16671 0.11800 0.11798

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/aug-cc-pVDZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.005 0.611 0.041
C2 -0.005 -0.611 0.041
N3 -0.005 1.969 -0.076
N4 0.005 -1.969 -0.076
H5 -0.342 2.472 0.736
H6 0.842 2.379 -0.450
H7 0.342 -2.472 0.736
H8 -0.842 -2.379 -0.450

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.22211.36302.58262.01672.01713.17833.1467
C21.22212.58261.36303.17833.14672.01672.0171
N31.36302.58263.93791.01291.01304.52804.4439
N42.58261.36303.93794.52804.44391.01291.0130
H52.01673.17831.01294.52801.67844.99125.0193
H62.01713.14671.01304.44391.67845.01935.0481
H73.17832.01674.52801.01294.99125.01931.6784
H83.14672.01714.44391.01305.01935.04811.6784

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.988 C1 N3 H5 115.376
C1 N3 H6 115.403 C2 C1 N3 174.988
C2 N4 H7 115.376 C2 N4 H8 115.403
H5 N3 H6 111.877 H7 N4 H8 111.877
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability