Denial of Tris(
<i>C</i>
,
<i>N</i>
‐cyclometalated) Ruthenacycle: Nine‐Membered η
<sup>6</sup>
‐
<i>N</i>
,
<i>N‐trans</i>
or η
<sup>2</sup>
‐
<i>N</i>
,
<i>N‐cis</i>
Ru
<sup>II</sup>
Chelates of 2,2′‐Bis(2‐pyridinyl)‐1,1′‐biphenyl
作者:Omar Saavedra‐Díaz、Ricardo Cerón‐Camacho、Simon Hernández、Alexander D. Ryabov、Ronan Le Lagadec
DOI:10.1002/ejic.200800584
日期:2008.11
AbstractIn the attempt to prepare the tris(cyclometalated) ruthenium derivative of 2‐phenylpyridine, [Ru(η6‐C6H6)(phpy)Cl] was treated with Hg(phpy)2. The anticipated [Ru(phpy)3]n+ species was not formed. Instead, the product of oxidative coupling of two 2‐(2‐pyridinyl)phenyl ligands to form octahedral [RuII(phpy)(pbp)]PF6 with pbp = 2,2′‐bis(2‐pyridinyl)‐1,1′‐biphenyl was isolated; pbp forms a nine‐membered chelate with two N and two η2‐C=C donor centers. The binding of η2‐C=C donor units is weak as they are readily replaced by CO. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)