2,2-Dimethyl-2,3-dihydro-1H-perimidine

Area of Science:

• Organic Chemistry
• Crystallography
• Supramolecular Chemistry

Background:

• Perimidine derivatives are nitrogen-containing heterocycles with diverse applications.
• Understanding the solid-state structure of novel organic compounds is crucial for predicting their properties and reactivity.

Purpose of the Study:

• To synthesize and characterize a novel perimidine derivative.
• To elucidate the crystal structure and intermolecular interactions of the title compound.

Main Methods:

• Chemical synthesis involving the reaction of diaminonaphthalene with acetone.
• Single-crystal X-ray diffraction analysis to determine molecular and crystal structure.
• Analysis of hydrogen bonding and other non-covalent interactions.

Main Results:

• The title compound, C(13)H(14)N(2), was successfully synthesized.
• The crystal structure revealed two independent molecules in the asymmetric unit, each featuring a planar naphthalene system and an envelope-conformed C(4)N(2) ring.
• The NCN group exhibited dihedral angles of 36.9° and 41.3° with the naphthalene backbone.
• Methyl substituents were observed in approximate axial and equatorial positions.
• Intermolecular interactions included classical N-H⋯N hydrogen bonding and short (C/N)-H⋯π(arene) interactions.

Conclusions:

• The study provides the first structural characterization of this novel perimidine derivative.
• The crystal packing is governed by a combination of hydrogen bonding and weaker C-H⋯π interactions.
• The findings contribute to the understanding of structure-property relationships in perimidine compounds.