Abstract:Dimethylarsine reacts with the compounds [Formula: see text] to give the ligands[Formula: see text]fnfars(n = 4, 6, 8) The reaction of diphenylphosphine with [Formula: see text] results in the mixed ligands[Formula: see text]fnAsP (n = 4, 6, 8)
The reaction of the ditertiary arsines and phosphines fnfars, fnfos, and fnAsP, (L–L), with Fe(CO)5 at 150° is a superior route to the complexes (L–L)Fe2(CO)6. Two are reported for the first time (L–L = f6fars, f8fars). The complexes react with monodentate and certain potentially bidentate ligands on u.v. irradiation to afford the monosubstituted derivatives L(L–L)Fe2(CO)5 and (L–L)'(L–L)Fe2(CO)5. Spectroscopic studies, in particular magnetically perturbed Mössbauer spectra, indicate that the site of substitution is trans to the FeA—FeB bond and cis to the two group V atoms (on FeA). Disubstitution seems to result in further displacement of CO from either FeA or FeB.
The reaction of the ditertiary arsines and phosphines fnfars, fnfos, and fnAsP, (L–L), with Fe(CO)5 at 150° is a superior route to the complexes (L –L)Fe2(CO)6. Two are reported for the first time (L–L = f6fars, f8fars). The complexes react with monodentate and certain potentially bidentate ligands on u.v. irradiation to afford the monosubstituted derivatives L(L–L)Fe2(CO)5 and (L–L)'(L–L)Fe2(CO)5. Spectroscopic studies, in particular magnetically perturbed Mössbauer spectra, indicate that the site of substitution is trans to the FeA—FeB bond and cis to the two group V atoms (on FeA). Disubstitution seems to result in further displacement of CO from either FeA or FeB.
“…Benzene was distilled over LiA1H4 prior to use. 2,2'-Dichlorooctafluoro-(bi-1-cyclobuten-1-yl) was prepared as indicated in [2] (4) as was the dodecafluoro(bi-1-cyclopenten-1-yl) analogue.…”
Section: Methodsmentioning
confidence: 99%
“…1, when n = 2 and X = F, only For personal use only. disubstitution has ever been obtained with diphenylphosphine (1, 1 1) (the product is known as f4fos) yet dimethylarsine gives monosubstitution at 25 OC and disubstitution at 150 OC (2,11).…”
. Can. J. Chem. 54, 2871 (1976).The bi-1-cycloalken-1-yl compounds CIC=C(CF~), $==cc~(cs), react with arsines and I -phosphines R2EH to yield R2EC=C(CF2), C=CCI(CF2), n = 2, R2E = (CHhAs, 1; n = 2, For personal use only.
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