Inorganic Chemistry, Vol.54, No.4, 1200-1202, 2015
Construction of the First Rhodium(I) Cyclic Pentameric Structure [Rh(CO)Cl{(mu-(NBuP)-Bu-t)(2)(C equivalent to CPh)(2)}](5) Using (Phenylethynyl)cyclodiphosphazanes
To examine the steric effect of the phosphorus substituents in cyclodiphosphazanes, two less sterically demanding alkynyl-functionalized cis-[(mu-(NBuP)-Bu-t)(2)(C CPh)(2)] (1) and trans-[(mu-(NBuP)-Bu-t)(2)(C CPh)(2)] (2) were synthesized. The cis isomer 1, with a large subtending angle (135.8 degrees) upon treatment with [Rh(CO)(2)Cl](2), afforded the first rhodium(I) cyclic pentameric macrocycle [Rh(CO)Cl{(mu-(NBuP)-Bu-t)(2)(C CPh)(2)}](5) (3). The crystal structure of the cyclic pentamer 3 closely resembles a classical Ferris wheel.