Novel multidentate ferrocene ligands and their tungsten complexes

Tungsten carbonyl σ-complexes with charge-compensated nido-carboranyl thioether ligands

“…The two equatorial W-C bonds (1.966(4) and 1.971(3) Å) are somewhat shorter than their axial counterparts (2.028(3) and 2.034(3) Å). The W-S bonds in the complex 4 (2.5388(8) and 2.5460(8) Å) are close to those found in (CO) 4 W(1,2-(MeS) 2 C 6 H 4 -κ 2 -S(1),S(2)), 15 (CO) 4 W-[(MeSC 5 H 3 ) 2 Fe)-κ 2 -S(1),S(2)], 16 (CO 17 (CO) 4 W[(MeSC 5 H 3 ) 2 Ru)-κ 2 -S(1),S(2)], 18 [(CO) 4 W] 2 -[(C 5 (SMe) 5 )Mn(CO) 3 -κ 4 -S(1),S(2), S(1′),S(2′)], 19 rac-and meso- 20 The two methyls are in a syn relationship and are turned upward relative to the pentagonal face of the carborane ligand in contrast to the structure of ( 5d where both the methyls are turned downward relative to the pentagonal face. The C carb -C carb bond in complex 4 is shorter than in ligand 3, which reflects reduced electron donation from the sulfur atoms to the carborane cage while C(7)-B (11) and C(8)-B(9) are only slightly elongated (Table 1).…”

Synthesis and characterisation of 1-(diphenylphosphino)-1′-(methylsulfanyl)ferrocene and a series of metal (CuI, AgI)–ferrocenylene complexes

“…As mentioned in the Introduction, hetero-donor substituted ferrocenes are known but to date most have featured pnictinide substituents. The different co-ordinating abilities of the phosphorus and sulfur substituents in L 1 , along with the possibility for further donor atom substitution around the same ferrocene unit, 34 opens up diverse co-ordination chemistry of these systems which is the subject of ongoing studies. As a starting point for the co-ordination chemistry and as a comparison to the more well known analogues 1,1Ј-bis(diphenylphosphino)ferrocene (BPPF) (L 2 ), 1,1Ј-bis(methylsulfanyl)ferrocene (BMSF) (L 3 ) and 1,1Ј-bis(isopropylsulfanyl)ferrocene (BPSF) (L 4 ), each ligand was treated with simple copper and silver tetrakis-(acetonitrile) complexes.…”

Twofold Ferrocene C–H Lithiations For One-Step Difunctionalizations

“…60 Dideprotonation of 1,1′-bis(methylthio)ferrocene was attempted, but only mixtures were obtained. [60][61][62] Scheme 20 Dideprotolithiation of 1,1′-dichloroferrocene followed by reaction with dimethyl disulfide…”