Premium
Synthesis, crystal structures and luminescence properties of seven mononuclear zinc(II), cadmium(II), cobalt(II) and nickel(II) complexes with 5‐(4‐methylphenyl)‐3‐(pyridin‐2‐yl)‐1 H ‐1,2,4‐triazole
Author(s) -
Liu Feng-Yi,
Zhou Dong-Mei,
Zhao Xiao-Lan,
Kou Jun-Feng
Publication year - 2017
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229617004697
Subject(s) - zinc , chemistry , nickel , crystal structure , cadmium , cobalt , medicinal chemistry , stereochemistry , metal , crystallography , inorganic chemistry , organic chemistry
Due to their versatile coordination modes and metal‐binding conformations, triazolyl ligands can provide a wide range of possibilities for the construction of supramolecular structures. Seven mononuclear transition metal complexes with different structural forms, namely aquabis[3‐(4‐methylphenyl)‐5‐(pyridin‐2‐yl)‐1 H ‐1,2,4‐triazolato‐κ 2 N 1 , N 5 ]zinc(II), [Zn(C 14 H 11 N 4 ) 2 (H 2 O)], (I), bis[5‐(4‐methylphenyl)‐3‐(pyridin‐2‐yl)‐1 H ‐1,2,4‐triazole‐κ 2 N 3 , N 4 ]bis(nitrato‐κ O )zinc(II), [Zn(NO 3 ) 2 (C 14 H 12 N 4 ) 2 ], (II), bis(methanol‐κ O )bis[3‐(4‐methylphenyl)‐5‐(pyridin‐2‐yl)‐1 H ‐1,2,4‐triazolato‐κ 2 N 1 , N 5 ]zinc(II), [Zn(C 14 H 11 N 4 ) 2 (CH 4 O) 2 ], (III), diiodidobis[5‐(4‐methylphenyl)‐3‐(pyridin‐2‐yl)‐1 H ‐1,2,4‐triazole‐κ 2 N 3 , N 4 ]cadmium(II), [CdI 2 (C 14 H 12 N 4 ) 2 ], (IV), bis[5‐(4‐methylphenyl)‐3‐(pyridin‐2‐yl)‐1 H ‐1,2,4‐triazole‐κ 2 N 3 , N 4 ]bis(nitrato‐κ O )cadmium(II), [Cd(NO 3 ) 2 (C 14 H 12 N 4 ) 2 ], (V), aquabis[3‐(4‐methylphenyl)‐5‐(pyridin‐2‐yl)‐1 H ‐1,2,4‐triazolato‐κ 2 N 1 , N 5 ]cobalt(II), [Co(C 14 H 11 N 4 ) 2 (H 2 O)], (VI), and diaquabis[3‐(4‐methylphenyl)‐5‐(pyridin‐2‐yl)‐1 H ‐1,2,4‐triazolato‐κ 2 N 1 , N 5 ]nickel(II), [Ni(C 14 H 11 N 4 ) 2 (H 2 O) 2 ], (VII), have been prepared by the reaction of transition metal salts (Zn II , Cd II , Co II and Ni II ) with 3‐(4‐methylphenyl)‐5‐(pyridin‐2‐yl)‐1 H ‐1,2,4‐triazole (pymphtzH) under either ambient or hydrothermal conditions. These compounds have been characterized by elemental analysis, IR spectroscopy and single‐crystal X‐ray diffraction. All the complexes form three‐dimensional supramolecular structures through hydrogen bonds or through π–π stacking interactions between the centroids of the pyridyl or arene rings. The pymphtzH and pymphtz − entities act as bidentate coordinating ligands in each structure. Moreover, all the pyridyl N atoms are coordinated to metal atoms (Zn, Cd, Co or Ni). The N atom in the 4‐position of the triazole group is coordinated to the Zn and Cd atoms in the crystal structures of (II), (IV) and (V), while the N atom in the 1‐position of the triazolate group is coordinated to the Zn, Co and Ni atoms in (I), (III), (VI) and (VII).