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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: B2PLYP=FULLultrafine/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=FULLultrafine/aug-cc-pVDZ
 hartrees
Energy at 0K-187.884510
Energy at 298.15K 
HF Energy-187.675700
Nuclear repulsion energy101.376075
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=FULLultrafine/aug-cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A 3636 3499 27.08      
2 A 3540 3407 0.82      
3 A 2357 2268 0.11      
4 A 1642 1580 7.87      
5 A 1193 1148 0.29      
6 A 817 786 2.70      
7 A 546 526 119.30      
8 A 383 369 9.28      
9 A 373 359 17.67      
10 A 167 161 18.63      
11 B 3636 3499 26.28      
12 B 3543 3409 7.43      
13 B 1643 1581 24.72      
14 B 1365 1313 118.74      
15 B 1192 1147 0.28      
16 B 602 579 271.64      
17 B 373 359 15.88      
18 B 169 162 20.60      

Unscaled Zero Point Vibrational Energy (zpe) 13588.2 cm-1
Scaled (by 0.9623) Zero Point Vibrational Energy (zpe) 13076.0 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 B2PLYP=FULLultrafine/aug-cc-pVDZ
ABC
5.16669 0.11800 0.11798

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/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
N31.36302.58263.93791.01291.01304.52794.4440
N42.58261.36303.93794.52794.44401.01291.0130
H52.01673.17831.01294.52791.67844.99115.0193
H62.01713.14671.01304.44401.67845.01935.0482
H73.17832.01674.52791.01294.99115.01931.6784
H83.14672.01714.44401.01305.01935.04821.6784

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.990 C1 N3 H5 115.376
C1 N3 H6 115.404 C2 C1 N3 174.990
C2 N4 H7 115.376 C2 N4 H8 115.404
H5 N3 H6 111.876 H7 N4 H8 111.876
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability