Premium
Synthesis and Crystal Structure of Two Succinato‐Bridged Macrocyclic Nickel(II) Complexes
Author(s) -
Ou GuangChuan,
Yuan XianYou,
Li ZhiZhang
Publication year - 2013
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.201200349
Subject(s) - nickel , crystallography , crystal structure , chemistry , octahedron , denticity , hydrogen bond , spectroscopy , monomer , ligand (biochemistry) , infrared spectroscopy , octahedral molecular geometry , stereochemistry , molecule , polymer , biochemistry , physics , receptor , organic chemistry , quantum mechanics
Two dinuclear succinato‐bridged nickel(II) complexes [Ni( RR ‐L)] 2 (μ‐SA)(ClO 4 ) 2 ( 1 ) and [Ni( SS ‐L)] 2 (μ‐SA)(ClO 4 ) 2 ( 2 ) (L = 5, 5, 7, 12, 12, 14‐hexamethyl‐1, 4, 8, 11‐tetraazacyclotetradecane, SA = succinic acid) were synthesized and characterized by EA, Circular dichroism (CD), as well as IR and UV/Vis spectroscopy. Single crystal X‐ray diffraction analyses revealed that the Ni II atoms display a distorted octahedral coordination arrangement, and the succinato ligand bridges two central Ni II atoms in a bis bidentate fashion to form dimers in 1 and 2 . The monomers of {[Ni( RR ‐L)] 2 (μ‐SA)} 2+ and {[Ni( SS ‐L)] 2 (μ‐SA)} 2+ are connected by O–H ··· O and N–H ··· O hydrogen bonds into a 1D right‐handed and left‐handed helical chain along the b axis, respectively. The homochiral natures of 1 and 2 are confirmed by the results of CD spectroscopy.