Thiocarbyl ligands via elimination of pentafluorobenzene at a diiron centre: crystal structures of [Fe2(CO)4{μ-SC(Ph)CH}(μ-dppm)] and [Fe2(CO)4{μ-SCHC(Ph)C(O)}(μ-dppm)]
摘要:
Reaction of [Fe-2(CO)(6){mu-O=C-C(Ph)=CH2}(SC6F5)] with bis(diphenylphosphino)methane (dppm) at 110 degreesC affords the alkenyl complex [Fe-2(CO)(4)(mu-HC=CHPh)(mu-SC6F5)(mu-dppm)] together with the novel complexes [Fe-2(CO)(4){mu-SC(Ph)=CH}(mu-dppm)] and [Fe-2(CO)(4) {mu-SCH=C(Ph)C(O)}(mu-dppm)] resulting from elimination of pentafluorobenzene. Both have been characterised crystallographically, the hydrocarbyl units acting as six-electron donors. The thioalkyne complex [Fe-2(CO)(4){mu-SC(Ph)=CH}(mu-dppm)] exists as cis and trans isomers. Both are fluxional and interconvert at higher temperatures as shown by 2D NMR. (C) 2003 Elsevier Science B.V. All rights reserved.
Thiocarbyl ligands via elimination of pentafluorobenzene at a diiron centre: crystal structures of [Fe2(CO)4{μ-SC(Ph)CH}(μ-dppm)] and [Fe2(CO)4{μ-SCHC(Ph)C(O)}(μ-dppm)]
摘要:
Reaction of [Fe-2(CO)(6){mu-O=C-C(Ph)=CH2}(SC6F5)] with bis(diphenylphosphino)methane (dppm) at 110 degreesC affords the alkenyl complex [Fe-2(CO)(4)(mu-HC=CHPh)(mu-SC6F5)(mu-dppm)] together with the novel complexes [Fe-2(CO)(4){mu-SC(Ph)=CH}(mu-dppm)] and [Fe-2(CO)(4) {mu-SCH=C(Ph)C(O)}(mu-dppm)] resulting from elimination of pentafluorobenzene. Both have been characterised crystallographically, the hydrocarbyl units acting as six-electron donors. The thioalkyne complex [Fe-2(CO)(4){mu-SC(Ph)=CH}(mu-dppm)] exists as cis and trans isomers. Both are fluxional and interconvert at higher temperatures as shown by 2D NMR. (C) 2003 Elsevier Science B.V. All rights reserved.