Gold(I) Complexes Derived from C6Me3(C⋮CH)3-1,3,5, C6Me4(C⋮CH)2-1,4, and MeC6H4C⋮CH-4

Abstract

C6Me3(C⋮CH)3-1,3,5 (Ar(C⋮CH)3) reacts with [AuCl(SMe2)] and NEt3 (1:3:3) to give [Au3{μ-(C⋮C)3Ar}]n (1). Complexes of the general formula [{AuL}3{μ-(C⋮C)3Ar}] can be obtained from 1 and excess isocyanide (L = tBuNC (2), XyNC (3)), by treating 2 with an excess of NHEt2 (L = C(NHtBu)NEt2 (4)), or by reacting [Ar(C⋮CH)3] with [Au(acac)PPh3] (1:3, L = PPh3 (5)) or with PPN[AuCl2] (1:3, PPN = Ph3PNPPh3) and an excess of NHEt2 (L = NHEt2 (6)). The reaction of C6Me4(C⋮CH)2-1,4 (Ar‘(C⋮CH)2) with PPN[AuCl2] (1:2) and an excess of NHEt2 gives [{AuNHEt2}2{μ-(C⋮C)2Ar‘}] (7), which reacts with 1,6-bis(diphenylphosphino)hexane (dpph) to give [Au2{μ-(C⋮C)2Ar‘}(μ-dpph)]n (8). The reactions of the alkynes [Ar(C⋮CH)3], [Ar‘(C⋮CH)2], and ToC⋮CH (To = 4-MeC6H4) with the appropriate amounts of PPN[Au(acac)2] (acac = acetylacetonato) allow the syntheses of the anionic complexes PPN[Au{C⋮CAr(C⋮CH)2}2] (9), PPN[Au{C⋮CAr‘C⋮CH}2] (10), PPN[Au{C⋮CTo}2] (11), (PPN)3n[Au{C⋮CAr(C⋮C)2}2Au2]n (12), and (PPN)n[Au{μ-(C⋮C)2Ar‘}]n (13). The...