Di‐μ‐chlorobis(1,5‐cyclooctadiene)diiridium(I)

[12112-67-3] C16H24Cl2Ir2 (MW 671.71) InChI = 1S/2C8H12.2ClH.2Ir/c2*1-2-4-6-8-7-5-3-1;;;;/h2*1-2,7-8H,3-6H2;2*1H;;/q;;;;2*+1/p-2/b2*2-1-,8-7-;;;; InChIKey = ZFOUDQNHNLDNLD-MIXQCLKLSA-L (active catalyst precursor for Claisen rearrangements,2 [2 + 2] cycloadditions,3 hydrosilations,4 and hydroboration5 reactions) Physical Data: mp 190 °C (dec); 1H NMR (CDCl3) δ 4.22 (m, CH2), 2.15 (m, CH2), 1.40 (CH2).6 Solubility: sparingly sol acetone; sol CH2Cl2 and toluene; insol diethyl ether. Form Supplied in: orange–red crystalline solid. Preparative Method: a solution of 6 mL of 1,5-cyclooctadiene in 35 mL of ethanol and 20 mL of water is added to 2.0 g of IrCl3·3H2O in a round-bottomed flask. The mixture is refluxed under nitrogen for 24 h, during which time an orange–red product precipitates from solution. The mixture is cooled to rt and di-μ-chlorobis(1,5-cyclooctadiene)diiridium(I) is collected by filtration, washed with cold methanol, and dried in vacuo at 25 °C for 8 h.1 Handling, Storage, and Precautions: the dry solid is moderately air-stable.