Treatment of Pd(PPh₃)₄ or Pd(dba)₂ (dba = dibenzylideneacetone) with different functionalized aryl bromides in toluene produced Pd(II)Br(Ar) complexes. Complexes PdBr(C₆H₄C≡CC₆H₄Br)(PPh₃)₂ (23) and PdBr(C₆H₄CHO)(PPh₃)₂ (32) can be converted to complexes PdBr(C₆H₄C≡CC₆H₄Br)(dppf) ( dppf = 1,1'-ferrocenediyl-bis(diphenylphosphine)) (31) and PdBr(C₆H₄CHO)(dppf) (33), respectively by treatment with dppf. Complexes PdBr(C₆H₄CHCHCHO)(bpy) (bpy = 2,2'-bipyridine) (33), [PdBr(C₆H₄CHCHCHNEt₂)(dppf)]OTf (35) and PdBr(C₆H₄CHCHCHO)(dppf) (36) are synthesized through one-pot reactions of Pd(dba)₂ or Pd₂(dba)₃•CHCl₃, bpy or dppf with corresponding functionalized aryl bromides.

Treatment of OsCl₂(PPh₃)₃ with 2-ethynylbenzaldehydein in toluene produced osmium carbyne complex OsCl₃(≡CCH₂C...[ Read more ]

Treatment of Pd(PPh₃)₄ or Pd(dba)₂ (dba = dibenzylideneacetone) with different functionalized aryl bromides in toluene produced Pd(II)Br(Ar) complexes. Complexes PdBr(C₆H₄C≡CC₆H₄Br)(PPh₃)₂ (23) and PdBr(C₆H₄CHO)(PPh₃)₂ (32) can be converted to complexes PdBr(C₆H₄C≡CC₆H₄Br)(dppf) ( dppf = 1,1'-ferrocenediyl-bis(diphenylphosphine)) (31) and PdBr(C₆H₄CHO)(dppf) (33), respectively by treatment with dppf. Complexes PdBr(C₆H₄CHCHCHO)(bpy) (bpy = 2,2'-bipyridine) (33), [PdBr(C₆H₄CHCHCHNEt₂)(dppf)]OTf (35) and PdBr(C₆H₄CHCHCHO)(dppf) (36) are synthesized through one-pot reactions of Pd(dba)₂ or Pd₂(dba)₃•CHCl₃, bpy or dppf with corresponding functionalized aryl bromides.

Treatment of OsCl₂(PPh₃)₃ with 2-ethynylbenzaldehydein in toluene produced osmium carbyne complex OsCl₃(≡CCH₂C₆H₄CHO)(PPh₃)₂ (44), which partially decomposed in CDCl₃ after overnight. Treatment of OsCl₂(PPh₃)₃ with compound 1,2-(Me₃SiC≡C)₂-C₆H₄ (49) in the presence of HBF₄•Et₂Oorcompound 1,2-(HC≡C)₂-C₆H₄ (50) in DCM produced a very complicated mixture. Treatment of OsCl₂(PPh₃)₃ with compound 1,2-HC≡CC₆H₄C≡CSiMe₃ (54) in the presence of Et₂O•HBF₄in toluene produced osmium carbyne complex OsCl₃(≡CCH₂C₆H₄C≡CSiMe₃)(PPh₃)₂.

A convenient method for synthesis of platinum bis(acetylide) complexes Pt(C≡C(OH)Ph₂)₂(dppf) (56) and [Pt(C≡C(OH)Ph₂)₂(bpy)] (57) was developed. The UV-vis and photoluminescence (PL) spectra of complexes Pt(C≡C(OH)Ph₂)₂(dppf) (56) and [Pt(C≡C(OH)Ph₂)₂(bpy)](57)in the presence of different metal cations were studied. For the five metal cations (Cu²⁺, Mg²⁺, Ca²⁺, K⁺, Zn²⁺), only Cu²⁺ enhanced the adsorption intensity and quenched the luminescence intensity when mixed with complexes Pt(C≡C(OH)Ph₂)₂(dppf) (56) or [Pt(C≡C(OH)Ph₂)₂(bpy)] (57).