Influence of the Metallofragment on the Regioselectivity in the Addition of the Radicals •CCl3 and •But to (η2‐C60)Ir H(CO) (PPh3)2, (η2‐C60)Ir H(CO)[(+)DIOP], (η2‐C60)Os(CO)(PPh3)2(CNBut) and on the Stability of the Spin‐adducts

Abstract

In this paper we have present the results of study for electronic influence of the metal fragment on the regioselectivity of addition of •CCl3 (R1 ) and •Bu t (R2 ) radicals to the complexes (η2‐C60)IrH(CO)(PPh3)2 (I), (η2‐C60)IrH(CO)[(+)DIOP] (II), (η2‐C60)Os(CO)(PPh3)2(CNBut) (III) and on the stability of spin‐adducts (SA). It was found that the addition of R1 and R2 to I–III unlike methano‐ or pyrrolidinofullerenes the ESR spectra exhibit signals from some regio‐isomers which substantial different by the g‐factor. The assignment of the individual signals to definite regio‐isomers was made. The rate constants of the addition of radicals R1 and R2 to carbon atoms of individual bonds in I–III were determined using the method of competing reactions.