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Synthesis and Characterization of Some Metal Complexes with New Nitrogen–Oxygen Donor Macrocyclic Ligands – X‐ray Crystal Structures of a 26‐Membered Reduced Monoprotonated Macrocycle and a 20‐Membered Pendant‐Arm Schiff‐Base Macrocyclic Cadmium(II) Complex
Author(s) -
Vicente Manuel,
Lodeiro Carlos,
Adams Harry,
Bastida Rufina,
Blas Andrés de,
Fenton David E.,
Macías Alejandro,
Rodríguez Adolfo,
RodríguezBlas Teresa
Publication year - 2000
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/(sici)1099-0682(200005)2000:5<1015::aid-ejic1015>3.0.co;2-u
Subject(s) - chemistry , schiff base , lanthanide , metal , ligand (biochemistry) , crystal structure , diamine , metal ions in aqueous solution , macrocyclic ligand , crystallography , amine gas treating , single crystal , medicinal chemistry , polymer chemistry , ion , organic chemistry , biochemistry , receptor
New series of macrocyclic Schiff‐base lanthanide(III), yttrium(III), and cadmium(II) complexes, [M( 1 )]X n (X = NO 3 – , M = Y, Ln = La–Yb except Pm and Dy; X = ClO 4 – , M = Cd, La, Ce, Pr, Sm, Gd, or Er) and [M( 3 )]X n (X = NO 3 – , M = Dy; X = ClO 4 – , M = Er and Cd), have been prepared by cyclocondensation of O 1 , O 7 ‐bis(2‐formylphenyl)‐1,4,7‐trioxaheptane with O 1 , O 7 ‐bis(2‐aninyl)‐1,4,7‐trioxaheptane ( 1 ) or tris(2‐aminoethyl)amine ( 3 ) in the presence of the appropriate metal salt as a template agent. The Schiff‐base macrocycles 1 and 3 are also formed in the absence of a metal ion. Treatment of 1 with NaBH 4 in methanol gives the diamine macrocycle 2 . The reactions of Ln III , Cd II , and Y III ions with 2 have also been investigated. The crystal structures of the monoprotonated ligand 2 and of the complex [Cd( 3 )](ClO 4 ) 2 have been determined by X‐ray diffraction analysis.