Revisiting Borylanilines: Unique Solid-State Structures and Insight into Photophysical Properties

The structure and photophysical properties of two known borylanilines, 4-(dimesitylboryl)­aniline (<b>1</b>) and 4-(dimesitylboryl)-3,5-dimethylaniline (<b>2</b>), have been investigated. <b>1</b> and <b>2</b> have similar donor and acceptor centers but differ in their molecular conformations. Compounds <b>1</b> and <b>2</b> have been structurally characterized, and they exhibit a rare form of intermolecular N–H- - -π electrostatic interactions. The structure and photophysical properties of <b>1</b> and <b>2</b> are discussed in the context of computational results