III Complexes with the Weakly Bonded Anions and

IRIDIUM(III) COMPLEXES WITH THE WEAKLY BONDED ANIONS (BFJ AND [OSO CFap 

Sabmittcd WOLFGANG BECK, HERBERT BAUER, ami BERNHARD OLGEMOLLER  

A quantity of fra s-Ir(Cl)(CO)(PPh3)2 (780 mg, 1.00 mmol) is suspended in 20 mL of dry dichloromethane in a Schlenk tube (100 mL) under dry argon, and 165 mg (0.139 mL, 1.00 mmol) of tetrafluoroboric acid (d = 1.18 gem 54% in diethyl ether, Merck), is added by means of a syringe at room temperature. The mixture is stirred magnetically for 15 min. The solid dissolves within a few seconds and the product crystallizes after several minutes. The precipitation is completed by addition of 60 mL of pentane. The mixture is centrifuged and the solvent is decanted. The solid is washed with flve portions of pentane, 20 mL each, and dried in vacuo. Yield 860 mg (99%). 

The hydrido(tetrafluoroborato)iridium(III) complex is a white crystalline solid, highly sensitive to air and moisture. It is soluble in dichloromethane. The IR spectrum (Nujol) shows absorptions at 2061 (vco). 2333 (v,h), 322 

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