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Phenazine-2,3-diamine.

R P Doyle¹, P E Kruger, P R Mackie

¹Department of Chemistry, University of Dublin, Trinity College, Dublin 2, Ireland.

Acta Crystallographica. Section C, Crystal Structure Communications

|February 15, 2001

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Researchers detailed the first crystal structure of the electron-rich heterocyclic diamine 2,3-diaminophenazine (DAP). The study reveals its unique crystal packing, highlighting pi-pi, hydrogen, and T-bonded interactions in its non-protonated form.

Area of Science:

Organic Chemistry
Biochemistry
Crystallography

Background:

2,3-diaminophenazine (DAP) is an electron-rich heterocyclic diamine.
DAP exhibits rich organic chemistry and intense luminescence, making it of significant interest.
Previous structural data for DAP in its non-protonated state was lacking.

Purpose of the Study:

To report the first crystal structure of non-protonated 2,3-diaminophenazine (DAP).
To elucidate the intermolecular interactions governing the crystal packing of DAP.
To provide insights into the structural basis of DAP's properties.

Main Methods:

Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
Analysis of the crystal structure focused on identifying non-covalent interactions.

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Computational methods may have been used to analyze bonding interactions (though not explicitly stated in the abstract).

Main Results:

The first crystal structure of non-protonated 2,3-diaminophenazine (DAP) has been determined.
The crystal packing is characterized by a network of pi-pi stacking interactions.
Significant hydrogen bonding and T-shaped (T-bonded) interactions were observed between DAP molecules.

Conclusions:

The study provides the definitive crystal structure of non-protonated DAP.
The observed crystal packing, driven by pi-pi, hydrogen, and T-bonded interactions, influences the molecule's solid-state properties.
This structural understanding is crucial for further exploration of DAP's applications in chemistry and biochemistry.