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Abstract: Copper powder reacts with zinc oxide, ammonium chloride, ethylenediamine and methyl ethyl ketone in methanol solution to afford a bimetallic complex with the open chain diaminodiaza ligand – 4,5-dimethyl-1,9-diamino-3,7-di-aza-nona-3-ene (L1) containing the –CH2–CH(CH3)–C(CH3)inking the amine residues. The origin of the bridge was shown to be a result of template condensation of methyl ethyl ketone and formaldehyde arisen in the process of oxidation of methanol over copper powder acting in the reaction as both a source of metal and a catalyst. The crystal structure of Cu(L1)ZnCl4 was determined by X-ray diffraction and represents the first example of L1 to be crystallographically characterized. [Copyright &y& Elsevier]

Four new heterobimetallic complexes [CuL 1 ][MnCl 4 ] ( 1 ), [CuL 2 ][MnCl 4 ] ( 2 ), [NiL 1 ][MnCl 4 ] ( 3 ), [NiL 2 ][MnCl 4 ] ( 4 ) (L 1 = 4,6,6-trimethyl-1,9-diamino-3,7-di-aza-nona-3-ene; L 2 = 1,15-dihydroxy-7,9,9-trimethyl-3,6,10,13-tetra-aza-pentadeca-6-ene) have been prepared from elemental metals, ethylenediamine dihydrochloride or its N-(2-hydroxyethyl) derivative and acetone by the template condensation reaction. All complexes have been characterized by elemental analysis, IR and UV-Visible spectroscopy. The structures of 2 and 3 have been determined by X-ray crystallography ( 2 : Orthorhombic, Pna2 1, a = 20.136(4), b = 11.185(2), c = 10.251(2)Å, Z = 4; 3 : Orthorhombic, Pca2 1, a = 14.335(2), b = 11.405(2), c = 11.154(2)Å, Z = 4 ). Both crystals consist of alternating complex cations [ML] 2+ and anions [MnCl 4 ] 2- linked together by N-H···Cl-Mn and O-H···Cl-Mn hydrogen bonds forming 2D corrugated sheets in ( 2 ) and 1D helical chains in ( 3 ). Complex 2 represents the first single crystal structure elucidation of the complex containing L 2 . [ABSTRACT FROM AUTHOR]

Abstract: The heterometallic complex [Co(L1)Cl2][ZnCl3(DMF)] (L1 =4,6,6-trimethyl-1,9-diamino-3,7-diazanon-3-ene) has been obtained by direct template synthesis from cobalt powder, zinc oxide, zinc chloride, ethylenediamine dihydrochloride and acetone in dimethylformamide and characterized by X-ray crystallographic analysis. The mechanism of the complex formation is suggested. [Copyright &y& Elsevier]