Synthesis and characterization of nickel(II) complexes with three potentially hexadentate Schiff-base ligands and polyamines: X-ray crystal structure determination of one nickel(II) complex

Abstract

Three new potentially hexadentate N 4 O 2 Schiffbase ligands (H 2 L 1 , H 2 L 2 and H 2 L 3 ) were prepared from the reaction of the polyamines N,N 0 -bis(2-aminophenyl)-1, 2-ethanediamine (L 1 ), N,N 0 -bis(2-aminophenyl)-1,3-propanediamine (L 2 ) and N,N 0 -bis(2-aminophenyl)-1,4-butanediamine (L 3 ), respectively with salicylaldehyde. Reaction of the Schiff bases with Ni(II) salts in the presence of N(Et) 3 gave the neutral complexes [NiL 4 ], [NiL 5 ] and [NiL 6 ]. Ni(II) complexes of the polyamines were also prepared. One of complexes [Ni(L 1 )(MeCN) 2 ](ClO 4 ) 2 ÁMeCN has been characterized through X-ray diffraction methods.

Bis{1-[3-(diethylammonio)propyliminomethyl]naphthalen-2-olato}nickel(II) dinitrate

“…Schiff bases are known to be versatile ligands in coordination chemistry (Hamaker et al, 2010;Wang et al, 2010;Mirkhani et al, 2010;Liu & Yang, 2009). A large number of complexes with Schiff bases have been reported because of their interesting structures and potential applications (Keypour et al, 2009;Adhikary et al, 2009;Peng et al, 2009). We report here the crystal structure of the title new nickel complex with the Schiff base ligand 1-…”

“…For background to complexes with Schiff bases, see : Hamaker et al (2010); Wang et al (2010); Mirkhani et al (2010); Liu & Yang (2009); Keypour et al (2009); Adhikary et al (2009); Peng et al (2009). For similar nickel complexes, see: Bhatia et al (1983); Kamenar et al (1990); Connor et al (2003); Lacroix et al (2004).…”

Bis[2-(cyclopentyliminomethyl)-5-methoxyphenolato]copper(II)

“…E66, m881 Schiff bases are known to be versatile ligands in coordination chemistry (Hamaker et al, 2010;Wang et al, 2010;Mirkhani et al, 2010;Liu & Yang, 2009). A large number of complexes with Schiff bases have been reported because of their interesting structures and potential applications (Keypour et al, 2009;Adhikary et al, 2009;Peng et al, 2009). We report here the crystal structure of the title new copper complex with the Schiff base ligand 2-(cyclopentyliminomethyl)-5-methoxyphenol.…”

{2-[2-(Isopropylamino)ethyliminomethyl]-5-methoxyphenolato}(thiocyanato-κN)nickel(II)

“…For background to the study of complexes with Schiff bases, see: Hamaker et al (2010); Wang et al (2010); Mirkhani et al (2010); Liu & Yang (2009); Keypour et al (2009); Adhikary et al (2009); Peng et al (2009). For related nickel complexes, see: Wang & Wei (2006); Wang (2007); Arıcı et al (1999).…”