Preparation of novel platinum and palladium complexes by reaction of 1,1'-metallocenedichalcogenols with tetrakis(triphenylphosphine)palladium(0) or -platinum(0). The important role of the coordinating ability of the metal atom of the metallocene in product formation

1,1′-Ferrocenedi(amido) Chelate Ligands in Titanium and Zirconium Complexes

“…It is assumed that, as a prerequisite for a Fe→M heterodimetallic interaction, M has to be a Lewis‐acidic, electron‐poor center with a vacant coordination site. Some [3]ferrocenophanes such as [{fcS 2 }M(PPh 3 )] (M=Pd ( 16 ),12 Pt ( 17 )13) and corresponding cations11 like 18 and 19 fulfill these requirements, and the relatively short distance (Fe→M<300 pm)—in addition to the distortion of the sandwich structure—is considered as an indication for a direct Fe−M interaction. Compound 15 a contains the shortest Fe−M bond (249 pm) observed so far in a ferrocene‐containing heterodimetallic coordination compound.…”

Synthesis, characterization and electrochemistry of ferrocenylselenolate bridged palladium(II) and platinum(II) complexes

“…Complex 4 contains one chelating ferrocenyl(bis)selenolate ligand and two phosphine groups in a cis orientation, a related complex having been prepared from Fe(C 5 H 4 SeH) 2 and Pt(PPh 3 ) 4 [28]. The two Pt-Se bond lengths are equivalent, 2.4855(8) and 2.4855(9) Å , and these lengths are very close to the equivalent bonds in 3, 2.4771(6) and 2.4889(6) Å .…”

Beyond Common Metal–Metal Bonds, κ3‐Bis(donor)ferrocenyl→Transition‐Metal Interactions

“…[16] The molecular structure of the Pt analogue ([Pt(Fe(C 5 H 4 S) 2 )(PPh 3 )]) ([2]) showed intrametallic FeÀPt distance 2.935(2) (Scheme 3). [17] The Ni analog with PPh 3 could not be synthesized, however,( [Ni(Fe(C 5 H 4 S) 2 )(PMePh 2 )]) ( [3]) was reported with aF e ÀNi distance 2.886(1) (Scheme 3). [18] The h 5 -C 5 H 4 ligands on the ferrocenyl moiety show tilt angles of 14.78 [3], [18] 19.68 [1], [19] and 21.08 [2], [17] consistentwith the increased atomic radii of the TM nuclei.…”

“…The Br À ligand in [16Br] was displaced by the formation of aF e !Pd bond in polar solvents to form [16]Br.T he formation of the Fe dative bond, however,i nhibits the reactivity of [16Br] toward transmetallation and therefore the catalystdoes not react any furtherinthe reductiveelimination of diaryl ethers( Scheme12). [31] The nickel complex [Ni-Cl(Ar F )(dippf)] [17]( dippf = 1,1'-bis(diisopropylphosphino)ferrocene) was also testeda sac atalystf or cross-coupling. This complex was formed by oxidative addition of Ar F Cl to am ixture of [Ni(COD) 2 ], COD = 1,5-cyclooctadiene, and dippf.…”