Compounds of Nickel(II) and Copper(II) With 3,5,5,13,13,15-Hexamethyl-1,2,6,9,12-pentaazacyclopentadeca-2,15-diene

Abstract

Reaction of the bis-β-amino ketone 4,4,12,12-tetramethyl-5,8,11-triazapentadecane-2,14-dione diperchlorate with nickel(II) or copper(II) in the presence of hydrazine results in the formation of complexes of the tetradentate pentaaza macrocycle 3,5,5,13,13,15-hexamethyl-1,2,6,9,12-pentaazacyclopentadeca-2,15-diene hpd. Singlet ground state [Ni( hpd )] (ClO₄)₂, triplet ground state [Ni( hpd )(NCS)₂], [Ni( hpd )A] ClO₄ (A = acac ^-, 1/2(C₂O₄^2-), NO₂-1,[Ni( hpd )(NO₃)] NO₃ and [Cu( hpd )](C1O₄)₂ were prepared. Infrared, electronic, ¹H and ¹³C n.m.r. spectra, magnetic susceptibilities, and the kinetics of the slow acid promoted aquation reactions of the cations at 25ºC in HCl/NaCl solutions (I= 1 mol 1^-1) are reported.