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Judul:	Complexation and Structural Studies of 5,5,7,12,12,14-hexamethyl-1,4,8,11- tetraazayclotetradeca-7,14-dienium Bromide Complexes with Copper Salts
Penulis:	Bohari M. Yamin \|\| email: bohari@ukm.edu.my
Jurnal:	Prosiding FMIPA 2015 Vol. 1 no. 1 - hal. 5-10 Tahun 2015 [ MIPA ]
Keywords:	Complexation, Structural
Abstract:	Both Copper chloride and sulfate reacted with 5,5,7,12,12,14-hexamethyl-1,4,8,11- tetracyclotetradeca-7,14-dienium bromide (Me6N4H4)Br2) to give the same complexes of [(Me6N4H2)Cu]Br2.2H2O. The copper atom is coordinated to the tetraaza nitrogen atoms in a square planar environment. The two amino nitrogen atoms were deprotonated. The two bromine anions remained as counter anion for the complex. Copper chloride gave complex of [(Me6N4H2)BrCu]Br.2H2O. The coordination sphere consists of the tetraaza nitrogen atoms and one bromo in a square pyramidal geometry. Contrary to CuCl2 copper bromide reacted to give slightly different of [(Me6N4H2)Cu(II)] [(Me6N4H2)(H2O)2Cu(II)][Br3Cu(I)]2. One of the tetraaza-Cu cation has two water molecules coordinated to the copper in a distorted octahedral geometry. The counter anion of tribromocupperate indicates that the reaction also involve a reduction of CuBr2. On the other hand ammonium terrachloroferrate(II) gave a complex of [(Me6N4H2)Cu(II)][Cl4Cu(II)] indicating the reaction involved complexation and deprotonation but tetrachlorocopperate is the counter anion instead of bromo.
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