W. Herrmann, J. Kuchler, P. Kiprof
Sep 18, 1990
Citations
0
Influential Citations
17
Citations
Journal
Journal of Organometallic Chemistry
Abstract
Abstract Methyltrioxorhenium(VII) ( 1 ) reacts cleanly as a typical 14e metallo-acid with nucleophilic anions X − , e.g. chloride and bromide, to yield hexa- or pentacoordinated anions formulated as [CH 3 ReO 3 X 2 ] 2- and [CH 3 ReO 3 X] − , that can be isolated as tetraalkylammonium ( 2a,b ) and bis(triphenylphosphane)immonium salts ( 3 ). It seems obvious that the size of the cationic counterion has some influence on the coordination number of the metal in the adduct thus formed. A 1/1-addition product, 4 , is formed from the reaction of the “metallo-acid” 1 with 4,4′-di(t-butyl)-2,2′-bipyridine. 4 is very soluble in common organic solvents and undergoes hydrolytic decomposition to [4,4′-di(t-butyl)-2,2′-bipyridinium]perrhenate ( 5 ) with concomitant elimination of methane. This ionic compound has a crystal structure consisting of discrete ions, with the perrhenate embedded in layers formed by bipyridinium cations (single crystal X-ray diffraction).