Copper complex with TMEDA

No modification is observed in the dimensionality compared with that of the parent gold cyanide complex, but an increment in the thermal stability is described in the final compound. In the structure of [Cu(tmeda)][Au(CN)2]2 (tmeda = N,N,N, N -tetramethylenediamine) aurophilic interactions connect ID chains which contain copper(II)-bridging and pendant [Au(CN)2] units. In this case the aurophilic interactions increase the structural dimensionality from one to three. The compound is synthesized by reaction of Cu(C104)2.6H20, tmeda (tetramethylethylenediamine) and K[Au(CN)2]. The structure of Au2Cu(CN)4(tacn)] (tarn = 1,4,7- triazacyclono-nane) contains two different sort of chains. One of them contains gold atoms in an ABCDABCD- pattern (Figure 2.16a), and the other is built from two kinds of... 

The related Hay Coupling has several advantages as compared with the Glaser Coupling. The copper-TMEDA complex used is soluble in a wider range of solvents, so that the reaction is more versatile. 

Oxidative dimerisation of 2-naphthols to l,l -bis-2,2 -naphthol (BINOL) derivatives has been studied extensively. Copper(ii) catalyst under molecular oxygen has shown broad versatility in this transformation. Copper(ii)-Schiff base complexes reveal good catalytic activity in the dimerisation of 2-naphthols with low catalyst loading. This catalyst system is not so effective for substrates bearing electron-withdrawing substituents. " Cu(OH)Cl(TMEDA) is stable and shows good catalytic activity even for electron-poor naphthols... 

A copper oxalate complex, Cu[PFTB](TMEDA) 2C204 is obtained in very low yield from a reaction between Cu(0H)2, H[PFTB], and TMEDA in a THF/benzene mixture (76).. >parently the copper hydroxide absorbed CO2 from the air which was reduced to oxalate. Both Cu(II) centers are 5-coordinate in a distorted square pyramidal configuration, with the highly disordered [PFTB] groups tmns to each other (Figure 4). 

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