| Synthesis and characterization of different Au(I) and Ag(I) complexes are described. Treatment of 1-methylimidazole with various bromophthalimide linkers produces [H(CH3im(CH2)nphth)] +, (n=1-5), as an off-white powder in good yield. Further treatment of [H(CH3im(CH2)nphth)]+, (n=2-5), with excess N2H4 in refluxing acetonitrile forms [H(CH3im(CH2)nNH2)] +, (n=2-5), as yellow oil. Reaction of [H(CH3im(CH 2)nNH2)]+, (n=2-5), with Au(tht)Cl in the presence of 1.0 M NaOH followed by treatment with excess NH4PF 6 forms [Au(CH3im(CH2)nNH3) 2](PF6)3, (n=2-5), as an off-white powder. Deprotonation of [Au(CH3im(CH2)nNH3)2](PF 6)3, (n=2-5), with Ag2O produces dimeric and polymeric mixed metal complexes. Similarly, treatment of [Au(CH3im(CH 2)nNH3)2](PF6)3, (n=2-5), with Ag2O forms dimeric and polymeric silver complexes. As expected, in these complexes the metal-metal separation increases as the length of the linker increases.;The alkylation of the propylene linker ligand precursor with two equivalents of 2-(chloromethyl)pyridine forms the hydrochloride salt, [H(CH3im(CH 2)3NH(CH2py)2)] (PF6)Cl in good yield. Reaction of [H(CH3im(CH2)3NH(CH 2py)2)](PF6)Cl with Au(tht)Cl in the presence of NaOH produces [Au(CH3im(CH2)3N(CH 2py)2)2Na](PF6)2. Further treatment of the sodium encapsulated gold complex with excess NH4PF 6 protonates the pyridyl nitrogen atoms to form the "proton sponge-like" complex [Au(CH3im(CH2)3N(CH2py) 2H)2](PF6)3. Upon deprotonation of the "proton sponge-like" complex with K2CO3, a potassium ion is encapsulated to produce [Au(CH3im(CH2) 3N(CH2py)2)2K](PF6) 2. Whereas, deprotonation of the "proton sponge-like" complex with Ag2O produces a polymeric {[AuAg(CH3im(CH 2)3N(CH2py)2)2] PF 6}n in good yield.;Treatment of the [H(pyCH2)2im)]BF4 with excess Cu2O produces the trimetallic [Cu3((pyCH 2)2im)3](BF4)3, cluster with considerably short Cu-Cu separation of 2.5090(8) A. Further treatment of the trimetallic copper(I) cluster with Au(tht)Cl forms the chloride bridged heterometallic complex with Cu-Au separation of 2.7467 (15) A. Likewise, treatment of the ligand precursor [H(CH3COOpyCH2) 2im)]BF4, with excess Ag2O produces triangulo-Ag 3 cluster, with a Ag•••Ag contact of 2.8624(9) A. |
