Department of Chemistry and Materials Research Laboratory University of Illinois, Urbana, Illinois 61801 U.S.A.;Max Planck Institut für Kohlenforschung, Mülheim/Ruhr, Mülheim, Germany
Abstract:
1,3-Cyclooctadiene reacts with trimethylaluminum and potassium according to the equation 4K + 4Al(CH3)3 + 2C8H12 3K[Al(CH3)4]+K[(C8H12)2Al] to give potassium bis(3,8-cis-cyclooctenyl) aluminate. The compound can be described as a bicyclo derivative of cyclooctene formed by the 1,4 addition to 1,3-cyclooctadiene. The structure of the complex was determined from 4500 unique data measured by single crystal X-ray diffractometer techniques. Full matrix least squares refinement gave final agreement factors of R1 = 0.043 (observed data) and R2 = 0.045 (all data) in the monoclinic space group P21/c (a = 9.658(6), b = 12.220(8) and c = 14.150(9)Å; β = 113.85(1)°; V = 1527.43 Å; Z = 4 for ?calc = 1.23 g cm?3).
