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- W2083258613 abstract "Abstract The new thiolate-bridged nickel dimer [Ni(η-C 5 H 5 ){μ-S(CH 2 ) 3 (OMe) 3 }] 2 ( 1 ), has been obtained by reaction of 3-mercaptopropyltrimethoxysilane with nickelocene. Thermal reaction between [Fe(CO) 2 (η-C 5 H 5 )] 2 and the disulphide [S(CH 2 ) 3 Si(OMe) 3 ] 2 in cyclohexane gives the dinuclear thiolate- bridged complex [Fe(CO)(η-C 5 H 5 ){μ-S(CH 2 ) 3 Si(OMe) 3 }] 2 ( 2 ), which can be isolated as two isomeric forms. Oxidation of 2 can be achieved by treatment with ferricinium hexafluorophosphate, resulting in the paramagnetic monocationic dinuclear species [Fe(CO)(η-C 5 H 5 ){μ-S(CH 2 ) 3 Si(OMe) 3 }] 2 PF 6 ( 3 ). Reaction of [Fe(CO) 2 (η-C 5 R 5 )Br] (R = H or Me) with HS(CH 2 ) 3 Si(OMe) 3 in the presence of Et 3 N, or with NaS(CH 2 ) 3 Si(OMe) 3 , in THF solution affords the mononuclear thiolate derivatives [Fe(CO) 2 (ηC 5 R 5 ){S(CH 2 ) 3 Si(OMe) 3 }] (R = H ( 4 ) or Me ( 5 )). The electrochemical behaviour of the synthesized complexes has been studied using cyclic voltammetry and coulometry. The dinuclear species 1 and 2 have been oxidized voltammetrically and monocationic 1 + and 2 + and dicationic 1 2+ and 2 2+ species have been detected, 1 + and 2 + being characterized by ESR spectroscopy. The electrochemical oxidation of the mononuclear complexes 4 and 5 is followed by the elimination of [S(CH 2 ) 3 Si(OMe) 3 ], the cationic species [Fe(CO) 2 (η-C 5 R 5 )(THF)] + or [Fe(CO) 2 (η-C 5 H 5 )PPh 3 )] + being detected if the oxidation is carried out in the presence of PPh 3 ." @default.
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- W2083258613 date "1990-03-01" @default.
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- W2083258613 title "Propyltrimethoxysilane-thiolate iron and nickel complexes: Synthesis, characterization and electrochemical behaviour" @default.
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- W2083258613 doi "https://doi.org/10.1016/s0020-1693(00)82044-7" @default.
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