31662-40-5Relevant articles and documents
Solid-liquid reactions of manganese and cobalt carbonyl anions with alkyl halides containing β-hydrogens or -halogens
Kovács, István,Ungváry, Ferenc,Garst, John F.
, p. 389 - 396 (2008/10/08)
Heterogeneous reactions afforded the first detection (by IR and NMR spectroscopy) of a secondary (η1-allyl)manganese carbonyl complex, CH3CH=CHCH(CH3)Mn(CO)5, which results from the reaction of solid NaMn(CO)5 with 4-bromo-2-pentene in benzene or in saturated hydrocarbons at temperatures up to 5°C. The analogous reaction of NaCo(CO)4 gives CH3-CH=CHCH(CH3)C(O)Co(CO)4, the product of CO insertion into CH3CH=CHCH(CH3)Co-(CO)4, which constitutes approximately 10% (by IR spectroscopy) of the equilibrium mixture with CH3CH=CHCH(CH3)C(O)Co(CO)4 under CO at 1 atm and 5°C. Addition of PPh3 to this mixture leads to the formation of isolable CH3CH=CHCH(CH3)C(O)Co(CO)3PPh3. Similar reactions of 4-bromo-2-pentene with NaMn(CO)4PPh3 and NaCo(CO)3PPh3 do not give metal-carbon-bonded species, nor do room-temperature reactions of 4-bromo-2-pentene with NaMn-(CO)5 and NaCo(CO)4. Instead, the products include 2-pentenes, 1,3-pentadienes, 4,5-dimethyl-2,6-octadiene isomers, BrMn(CO)5, Mn2(CO)10, Co2(CO)8, and η3-(CH3CHCHCHCH3)Co(CO)3. Reactions of dimethyl chlorosuccinate, ethyl 2-bromopropionate, methyl 3-bromopropionate, and dimethyl dibromosuccinate with NaMn(CO)5 and NaCo(CO)4 give varying amounts of alkylmetal carbonyl compounds and products of β-elimination. The characteristics of these transformations suggest radical mechanisms initiated by single electron transfer (SET). Radical pairs formed by SET are implicated as intermediates in both substitutions and eliminations.
Photochemical reactions between dinuclear metal carbonyl complexes and alkyl halides. Formal oxidative addition across a metal-metal single bond proceeding by a free radical chain mechanism
Biddulph, Michael A.,Davis, Reg,Wilson, Fiona I. C.
, p. 277 - 293 (2007/10/02)
Photochemical reactions between (L = CO, PBu3, PEt3, P(OMe)3, P(OPh)3, PPh3) and alkyl halides (RX) yield both alkyl and halo complexes, and , in equimolar quantities.Kinetic and quantum yield studies suggest that these reactions proceed by a radical chain pathway involving CO dissociation from the dinuclear complex and metal-metal bond homolysis of the coordinatively unsaturated dinuclear intermediate.
Photochemistry of MnRe(CO)10: Selective loss of CO from manganese and net substitution to yield Mn(CO)4(PPh3)Re(CO)5 [1]
Oyer, Timothy J.,Wrighton, Mark S.
, p. 3689 - 3691 (2008/10/08)
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