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All results from a given calculation for H2NCHCHNH2 (diaminoethylene)

using model chemistry: QCISD(T)=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 QCISD(T)=FULL/aug-cc-pVDZ
 hartrees
Energy at 0K-188.839895
Energy at 298.15K 
HF Energy-188.120424
Nuclear repulsion energy116.298798
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 QCISD(T)=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 3573 3466        
2 A 3472 3369        
3 A 3154 3060        
4 A 1734 1683        
5 A 1625 1577        
6 A 1317 1277        
7 A 1271 1233        
8 A 1030 999        
9 A 915 887        
10 A 818 794        
11 A 540 524        
12 A 300 291        
13 A 242 235        
14 B 3572 3465        
15 B 3471 3367        
16 B 3157 3062        
17 B 1635 1586        
18 B 1377 1336        
19 B 1162 1127        
20 B 1118 1084        
21 B 799 775        
22 B 741 718        
23 B 328 318        
24 B 239 231        

Unscaled Zero Point Vibrational Energy (zpe) 18793.4 cm-1
Scaled (by 0.9701) Zero Point Vibrational Energy (zpe) 18231.5 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 QCISD(T)=FULL/aug-cc-pVDZ
ABC
1.39204 0.12992 0.12078

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.320 0.598 0.036
C2 -0.320 -0.598 0.036
N3 -0.320 1.870 -0.114
N4 0.320 -1.870 -0.114
H5 1.418 0.642 0.037
H6 -1.418 -0.642 0.037
H7 -1.337 1.782 -0.069
H8 1.337 -1.782 -0.069
H9 -0.027 2.522 0.615
H10 0.027 -2.522 0.615

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10
C11.35631.43212.47271.09842.13482.03912.59032.03943.1869
C21.35632.47271.43212.13481.09842.59032.03913.18692.0394
N31.43212.47273.79472.13302.74601.02144.01081.02124.4662
N42.47271.43213.79472.74602.13304.01081.02144.46621.0212
H51.09842.13482.13302.74603.11262.98262.42832.44043.5045
H62.13481.09842.74602.13303.11262.42832.98263.50452.4404
H72.03912.59031.02144.01082.98262.42834.45551.65244.5670
H82.59032.03914.01081.02142.42832.98264.45554.56701.6524
H92.03943.18691.02124.46622.44043.50451.65244.56705.0449
H103.18692.03944.46621.02123.50452.44044.56701.65245.0449

picture of diaminoethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 124.917 C1 C2 H6 120.475
C1 N3 H7 111.324 C1 N3 H9 111.353
C2 C1 N3 124.917 C2 C1 H5 120.475
C2 N4 H8 111.324 C2 N4 H10 111.353
N3 C1 H5 114.248 N4 C2 H6 114.248
H7 N3 H9 107.984 H8 N4 H10 107.984
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability