137928-05-3Relevant articles and documents
Alkinyl-substituierte Chlorsilane als Clusterbausteine
Lang, Heinrich,Lay, Uwe,Zsolnai, Laszlo
, p. 377 - 387 (2007/10/02)
The reaction of phenylethynyl-substituted chlorosilanes with dicobaltoctacarbonyl is discussed.Co2(CO)8 (II) yields selectively with (R)(PhCC)Si(H)(Cl) (R = Me: I; R = CCPh: V) (R)2-CCPh)Co2(CO)6>Si(H)(Cl) (R = Me: III; R = CCPh: VI), in which the phenylethynyl group is η2 side-on co-ordinated to "Co2(CO)6".III affords with further Co2(CO)8 under oxidative addition (Me)2-CCPh)Co2(CO)6>Si(Cl) (IV); IV may also be obtained directly by the reaction of I with 1.5 equivalents of II.VI contains a non-coordinated CCPh group and yields with one equivalent of II the tetranuclear complex 2-CCPh)Co2(CO)6>2Si(H)(Cl) (VII) in which the two CCPh ligands form sterically-hindered carbon-cobalt tetrahedrane cluster units.Compounds VIII and X show the same reaction behaviour as I and V: (R)(PhCC)Si(Cl)2 (R = Ph:VIII; R = H:X) reacts with one equivalent of II to yield in the first step (R)2-CCPh)Co2(CO)6>Si(Cl)2 (R = Ph:IX; R = H:XI).Addition of 0.5 parts of II to XI affords in high yields complex 2-CCPh)Co2(CO)6>Si(Cl)2 (XII).In a similar manner, compound (Me)(PhCC)Si(H)2 (XIII) yields with one equivalent of II the dinuclear complex (Me)2-CCPh)Co2(CO)6>Si(H)2 (XIV) which slowly decompose to form oligomeric compounds as well as (η2-PhCCH)Co2(CO)6 (XV).All new compounds were characterized by analytical and spectroscopic data (IR, 1H, 13C NMR, MS), and (Me)2-CCPh)Co2(CO)6>Si(Cl) (IV) by X-ray analysis.
