%0 Journal Article
%A Harding, Brennen A.
%A Melvin, Patrick R.
%A Dougherty, William
%A Kassel, Scott
%A Goodson, Felix E.
%D 2013
%T Capturing a Ghost. Synthesis and Structural Characterization
of Pd(dba)[P(o‑Tol)3]2
%U https://acs.figshare.com/articles/journal_contribution/Capturing_a_Ghost_Synthesis_and_Structural_Characterization_of_Pd_dba_P_i_o_i_Tol_sub_3_sub_sub_2_sub_/2402773
%R 10.1021/om400335a.s001
%2 https://acs.figshare.com/ndownloader/files/4042480
%K dba
%K Pd
%K tris
%K literature synthesis
%K alternative synthesis
%K Structural Characterization
%K phosphine ligands
%K polymerization reactions
%K palladium compound
%K palladium complexes
%X In
an effort to improve upon a literature synthesis of bis[tris(o-tolyl)phosphine]palladium(0) (1) from tris(o-tolyl)phosphine and Pd2(dba)3, we
instead isolated a new compound which proved to have the composition
Pd(dba)[P(o-Tol)3]2 (2), upon analysis by X-ray crystallography. While this is
not the first known palladium compound containing both dba and phosphine
ligands, it is, to our knowledge, the first containing dba and tris(o-tolyl)phosphine. This is significant, because mixtures
of Pd2(dba)3 and tris(o-tolyl)phosphine
are routinely used in cross-coupling protocols, and palladium complexes
containing dba and tris(o-tolyl)phosphine have been
cited as intermediates in organometallic and polymerization reactions.
The most interesting crystallographic parameter for 2 is an abnormally long Pd–P bond length of 2.388(1) Å,
which we believe is the cause of this complex’s metastability.
We also present an alternative synthesis of 1 that does
not require a large excess of phosphine.
%I ACS Publications