Quasi-Thermoneutral P → B Interactions within Di- and Tri-Phosphine Boranes

Abstract
Spectroscopic, structural, and theoretical evidence is provided for both open (no intramolecular P → B interaction) and closed (with intramolecular P → B interaction) forms of the di- and tri-phosphine boranes [o-(iPr2P)C6H4]2BPh (2) and [o-(iPr2P)C6H4]3B (3).

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