Anion structures trinuclear complexes

Fig. 35 Left Molecular structure of dipicatriz. Right side views of the crystal structures of the Zn(II) and the Cu(II) trinuclear complexes of dipicatriz. The structures show the three coordinate Zn(II) and Cu(ll) ions in scaled ball-and-stick representation and the distances between the centroids of the triazine ring and the closest oxygen atoms of the interacting nitrate anions...

The multicomponent assembly of the tricopper(I) metallostar [(21) Cu(20) 3] (2 from (21), (20) and [Cu(MeCN)4][BF4] in CH2CI2 has been described by Lehn and Baxter. This self-assembly process is the prototype reaction for the construction of a series of heteroleptic multi-nuclear cylindrical species. The related complex [(24) Cu(dppe) 3] has been reported and is of interest as in the reaction of copper(I) with (24), the ligand is reduced to the radical anion (24 ). The dicationic species (25) (only ipso carbon of the phenyl represented) comprises three copper(I) centers and a (24 ) radical anion. The reaction of (18) with [Cr(CO)e] yields the trinuclear star [(18) Cr(CO)4 3] together with dinuclear and mononuclear species. The trinuclear complex with terminal dicyanamide ligands [(18) Co(N(CN)2)2 3] has also been reported and structurally characterized. ... 

Chromium, (ri6-benzene)tricarbonyl-stereochemistry nomenclature, 1,131 Chromium complexes, 3,699-948 acetylacetone complex formation, 2,386 exchange reactions, 2,380 amidines, 2,276 bridging ligands, 2,198 chelating ligands, 2,203 anionic oxo halides, 3,944 applications, 6,1014 azo dyes, 6,41 biological effects, 3,947 carbamic acid, 2,450 paddlewheel structure, 2, 451 carboxylic acids, 2,438 trinuclear, 2, 441 carcinogenicity, 3, 947 corroles, 2, 874 crystal structures, 3, 702 cyanides, 3, 703 1,4-diaza-1,3-butadiene, 2,209 1,3-diketones... 

An extension of the research on silver complexes with Lewis base-functionalized mono(A-heterocyclic carbene) ligands has been made toward the better-studied and stronger coordinating phosphine systems. The reaction of a diphenylphosphine-functionalized imidazolium salt with silver oxide in dichloromethane affords a trinuclear silver carbene complex 50, as confirmed by electrospray-ionization mass spectrometry.96,97 Metathesis reaction of 50 in methanol using silver nitrate gives 51 in 33% yield. The crystal structures of 51 were found to be different when different solvents were used during crystallization (Scheme 12).97 One NO3- anion was found to be chelated to... 

Similar observations were made with bis[alkoxy(alkylamino)carbene]gold complexes, which are prepared by ring opening of trinuclear precursors with trifluoromethanesulfonic (triflic) acid. Through anion metathesis, several crystalline forms were obtained, the structures of which were determined. The triflate salt has a chain of cations in the crystal, while the chloroform solvate of a />-benzoquinolate contains only monomeric cations. In the solvent-free crystals, dimers are present (Scheme 59).251... 

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