Comparison of the self-reactivity of [CpCo(PP)I]+ complexes, PP = Ph2P(CH2)nPPh2 (n = 1-4), leading to bridged and oxidized dangling PP. Reactions, spectral studies, and structures of [CpCo(dppm)I]I.CHCl3, CpCo[dppm(O)]I2, and Cp2Co2I4(.mu.-dpppent)

New Heteronuclear Bridged Borylene Complexes That Were Derived from [{Cp*CoCl}2] and Mono‐MetalCarbonyl Fragments

“…In a bridging mode, these ligands can bring two metal centers into close proximity with one another, thereby resulting in so-called "A-frame"-type complexes and, hence, support organometallic reactions that involve two metal centers. [26][27][28][29] Furthermore, it is known that the [Cp*FeA C H T U N G T R E N N U N G (dppe)] moiety (dppe = 1,2-bis (diphenylphosphino)ethane) shows rich redox chemistry and, thus, it has been utilized as a building block in the synthesis of organometallic molecular wires. [30] As a result, with a variety of multimetallic clusters (RuÀ Fe, RuÀMn, TaÀFe, and CoÀM (M= W, Mo, Cr)) that contain a "parent" borylene ligand (BH) in hand, we studied their reactivity toward diphosphine ligands under both photolytic and thermal conditions.…”

Transition-metal complexes of group 12 with 1,1′-bis(phosphanyl)ferrocene ligands

“…Our investigation was focused exclusively on 1-diphenylphosphinoyl-1 0 -(di-tert-butylphosphanyl)ferrocene containing -P(t-Bu) 2 and -PPh 2 groups (Trivedi et al, 2014) because they cannot be monooxidized selectively using previously reported methods (Bao et al, 1985;Seyferth, 1969;Bondarenko et al, 1991;Grushin, 2001;Siegl et al, 1971;Brock & Mayer, 1991;Mä ding & Scheller, 1988;Reed et al, 1996;Katti & Cavell, 1989;Mastrorilli et al, 1999). In view of the lack of a sound synthetic protocol to obtain the monooxidized product, a biphasic process (organic solvent-aqueous KOH) has been developed (Fig.…”

“…Bis-phosphine monooxides (BPMOs) of the general formula R 1 R 2 P-Fc-P(O)R 3 R 4 (where Fc = ferrocene) constitute one of the most important classes of hemilabile ligands (Bader & Lindner, 1991;Slone et al, 2007). Various BPMOs have already proven to be remarkably useful in inorganic/ organometallic syntheses (Faller et al, 1999(Faller et al, , 2000a(Faller et al, ,b, 2001Vicente et al, 1997;Mecking & Keim, 1996;Bhattacharyya et al, 1996;Blagborough et al, 1994;Higgins et al, 1987;Bao et al, 1985), metal complex catalysis (Abu-Gnim & Amer, 1996;Weber et al, 2000;Wegman et al, 1987;Brassat et al, 2000;Faller & Parr, 2000, 2001Nandi et al, 1999;Sekar & Nishiyama, 2001), cancer (Berners-Price et al, 1987) and AIDS research (Debnath et al, 1999), and analytical chemistry.…”

“…The chemistry of BPMOs is developing slowly due to the lack of a convenient method of synthesis of such ligands. A few methods (Seyferth, 1969;Bondarenko et al, 1991;Grushin, 2001;Bao et al, 1985) have been developed to prepare BPMOs but they are usually nonselective, leading to mixtures of the unreacted diphosphine and its monooxide and dioxide (Berners-Price et al, 1987;Siegl et al, 1971;Brock & Mayer, 1991;Mä ding & Scheller, 1988;Reed et al, 1996;Katti & Cavell, 1989;Mastrorilli et al, 1999). Mä ding & Scheller (1988) have reported that basic bidentate dialkylphosphanyl substrates can be selectively monooxidized via monoprotonation followed by oxidation.…”

Synthesis, X-ray structures, electrochemistry, magnetic properties, and theoretical studies of the novel monomeric [CoI2(dppfO2)] and polymeric chain [CoI2(μ-dppfO2)n]

“…This reaction is similar to the one described for Co(η 5 -C 5 H 5 )(CO)I 2 with bis(tertiary phosphines). 9 Exposure of THF or CH 2 Cl 2 solutions of 1 to air results in a colour change from red-brown to green in one or two days; from the green solutions green crystals can be obtained. The reaction was repeated several times and although a colour change was always observed, it was difficult to obtain crystals in all cases, and the yields were erratic.…”