1H, 13C, and 19F NMR studies of phencyclone adducts of N-(polyhalophenyl)maleimides: evidence for dynamic NMR in maleamic acids

Correlation between Solid-State and Solution Conformational Ratios in a Series of N-(o-Tolyl)Succinimide Molecular Rotors

“…Second, the two conformers had similar shapes and volumes (Figure 3). 30−32 Although the anti-conformer with its protruding ortho-methyl group appears to be the larger conformer, the imide nitrogen can readily pyramidalize 33,34 reducing the size of the anti-conformer and allowing it to fit in the same space as the syn-conformer. For example, the syn-and anti-conformers occupied the same crystallographic space in the majority of the mixed conformer crystals.…”

N-1- and N-2-Anthryl Succinimide Derivatives: C–N Bond Rotational Behaviors and Fluorescence Energy Transfer

“…Recently, investigations toward a better understanding of weak noncovalent interactions involving aromatic rings has led to design small molecular systems featuring rigid polycyclic N -arylsuccinimide scaffolds, taking advantage of their concave molecular geometry that can fasten the N -aryl substituent closely interacting with the sidewall arene moiety. − The arene–arene interactions between aryl sidewall and N -aryl moiety could subsequently affect molecular properties, such as the conformational preferences, − molecular packing motifs in solid states, , and intramolecular charge/energy transfer, − granting opportunity to scrutinize the intra/intermolecular π···π (face-to-face) and CH···π (edge-to-face) interactions. , In this context, we designed and prepared rigid bicyclic N -anthrylsuccinimides 1a , 1b , 2a , and 2b (shown in Scheme ). These succinimides are characterized by two structural features, the presence or absence of diphenylnaphthalene sidewall ( 1a vs 2a and 1b vs 2b ) and the attachment position of N imide to anthracene ring ( 1a vs 1b and 2a vs 2b ).…”