Abstract
The synthesis, structures, and quantum-chemical calculations of tri(phosphorano)borazinium ions are reported for the first time. [HBNPEt3]33+(I-)3 (6) and [H4B3(NPEt3)3]2+(I -)2 (7) originate from iodine acting on the borane adduct at trimethylsilyltriethylphosphoraneimine. With acetonitrile 6 reacts under formation of [{HBNPEt3}3CH3CN]3+(I -)3 · CH3CN (8). While 6 forms an almost planar B3N3 six-membered ring with BN distances of 143 pm, which are equivalent to those in borazine molecules, in 7 and 8 one boron atom at a time is sp3 hybridized due to an additional bonding with a hydride ligand and to the adduct formation with acetonitrile, respectively. The quantum-chemical calculations suggest relatively polar B-N bonds.
Translated title of the contribution | Tri(phosphorano)borazinium Ions |
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Original language | German |
Pages (from-to) | 1105-1110 |
Number of pages | 6 |
Journal | Zeitschrift fur Anorganische und Allgemeine Chemie |
Volume | 624 |
Issue number | 7 |
DOIs | |
State | Published - Jul 1998 |
Externally published | Yes |