Bis(triphenylphosphine)iminium tetrafluoroborate chloroform monosolvate

Abstract

In the title compound, C 36 H 30 NP 2 + ÁBF 4 À ÁCHCl 3 or [PPN]BF 4 ÁCHCl 3 , where [PPN] = [(Ph 3 P) 2 N] + , two triphenylphosphine units are attached to a central N atom. The P-N-P bond angle is 137.69 (11) . The two P-N bonds are nearly equivalent, with lengths of 1.5834 (18) and 1.5798 (17) Å . Both the BF 4 À anion and the chloroform solvent molecule are disordered over two positions, with occupancy ratios of 0.872 (3):0.128 (3) and 0.9628 (9):0.0372 (9), respectively. In the crystal, C-HÁ Á ÁF and C-HÁ Á ÁCl hydrogen bonds link the [PPN] + cations, the BF 4 À anions, and the chloroform solvent molecules into an array which extends along the b-axis direction.

Liberating the Anion: Evaluating Weakly Coordinating Cations

“…The general procedure using P5 chloride (50 mg, 0.64 mmol, 1.0 equiv) afforded the tetrafluoroborate salt in quantitative yield (53 mg, 100%). The resulting spectra are in agreement with those in previous reports …”

“…The general procedure with PPN chloride (50 mg, 0.87 mmol, 1.0 equiv) afforded 53 mg (98%) of the known tetrafluoroborate salt …”

“…The resulting spectra are in agreement with those in previous reports. 83 1 H NMR (500 MHz, CDCl 3 ): δ 2.62 (d, 3 J P−H = 9.8 Hz, 72H). 19 Tetrakis(4-dimethylaminophenyl)phosphonium Tetrafluoroborate (11BF 4 ).…”