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- W1726902531 abstract "The compound FvCr 2 (CO) 6 Me 2 (1) is obtained, via the intermediate formation of Et 4 N[FvCr 2 (CO) 6 Me] (2), by stepwise addition of 2 equivalents of methyl iodide to (Et 4 N) 2 [FvCr 2 (CO) 6 ]; the analogous cyanomethyl compounds FvCr 2 (CO) 6 (CH 2 CN) 2 (3) and Et 4 N[FvCr 2 (CO) 6 (CH 2 CN)] (4) are formed similarly. Compound 1 readily undergoes CO insertion upon treatment with 2 equivalents of PMe 2 Ph, giving rise to trans,trans-FvCr 2 (CO) 4 (PMe 2 Ph) 2 (COMe) 2 (6), also in two steps via trans-FvCr 2 (CO) 5 (PMe 2 Ph)(Me)(COMe) (8). The neutral methyl half of 2 reacts similarly with PMe 2 Ph to form Et 4 N[trans-FvCr 2 (CO) 5 (PMe 2 Ph)(COMe)] (7), while the anionic half of 2 is alkylated with ClCH 2 CN to give FvCr 2 (CO) 6 (CH 2 CN)Me (5). Treatment of 5 with PMe 2 Ph also results in CO insertion into the Cr—Me bond to give trans-FvCr 2 (CO) 5 (PMe 2 Ph)(CH 2 CN)(COMe) (10). Although 3 is inert to both substitution and insertion reactions with PMe 2 Ph, the phosphine-substituted dialkyl (fulvalene)dichromium complex trans,trans-FvCr 2 (CO) 4 (PMe 2 Ph) 2 (CH 2 CN) 2 (9) is prepared by reaction of ClCH 2 CN with (Et 4 N) 2 [FvCr 2 (CO) 4 (PMe 2 Ph) 2 ]. Key words: chromium, metal–metal bonds, fulvalene." @default.
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- W1726902531 date "1996-11-01" @default.
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- W1726902531 title "Novel (fulvalene)dichromium alkyl and acyl complexes of the types FvCr2(CO)6−nLnRR′ and Et4N[FvCr2(CO)6−nLnR] (R, R′ = Me, CH2CN, COMe; L = CO, PMe2Ph; n = 0, 1, 2)" @default.
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- W1726902531 doi "https://doi.org/10.1139/v96-240" @default.
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