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Solvolthermal Syntheses and Crystal Structures of Three Linear Trinuclear Schiff Base Complexes of Zinc(II) and Cadmium(II)
Author(s) -
You ZhongLu,
Zhu HaiLiang,
Liu WeiSheng
Publication year - 2004
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200400125
Subject(s) - schiff base , chemistry , crystallography , octahedron , moiety , zinc , ligand (biochemistry) , crystal structure , stereochemistry , square pyramidal molecular geometry , coordination geometry , infrared spectroscopy , atom (system on chip) , ion , molecule , hydrogen bond , biochemistry , receptor , computer science , embedded system , organic chemistry
Three linear trinuclear Schiff base complexes, {Zn[Zn(CH 3 COO)(C 17 H 16 N 2 O 2 )] 2 } ( 1 ), {Zn[Zn(CH 3 COO)(C 25 H 20 N 2 O 2 )] 2 } ( 2 ), and {Cd[Cd(CH 3 COO)(C 18 H 18 N 2 O 2 )] 2 } ( 3 ), were synthesized for the first time under solvolthermal conditions. Their structures have been characterized by elemental analyses, X‐ray single crystal determinations, and infrared spectroscopy. There are three bridges across the M‐M atom pairs (M is Zn for 1 and 2 , or Cd for 3 ) in each complex, involving two O atoms of a Schiff base ligand ( N,N′ ‐bis(salicylidene)‐1, 3‐propanediaminate (SALPD 2‐ ) for 1 , N , N′ ‐bis(2‐hydroxy‐naphthalmethenylimino)‐1, 3‐propanediaminate (NAPTPD 2‐ ) for 2 , and N,N′ ‐bis‐(salicylidene)‐1,4‐butanediaminate (SALBD 2‐ ) for 3 ), and an O‐C‐O moiety of a μ ‐acetato group. In each of the complexes, the central M 2+ ion is located on an inversion center and has a distorted octahedral coordination involving four bridging O atoms from two Schiff base ligands in the equatorial plane and one O atom from each bridging acetate group in the axial positions. The coordination around the terminal M 2+ ions is irregular square pyramidal, with two O atoms and two N atoms of the Schiff base ligand in the basal plane and one O atom from an acetate group in the apical position. The acetate bridges linking the central and terminal M 2+ ions are mutually trans . The M…M distances are 3.050(3) Å in 1 , 3.139(2) Å in 2 , and 3.287(6) Å in 3 .