Anion influence in the structural diversity of cadmium coordination polymers constructed from a pyridine based Schiff base ligand

Author(s)
Ali Akbar Khandar, Farhad Akbari Afkhami, Seyed Abolfazl Hosseini-Yazdi, Jonathan M. White, Scott Kassel, William G. Dougherty, Janusz Lipkowski, Donald Van Derveer, Gerald Giester, Ferdinando Costantino
Abstract

A series of seven coordination polymers based on Cd and potentially tetradentate pyridine based Schiff base ligand with different anions (CH

3COO

-, NO

2

-, Cl

-, I

-, N

3

-, SCN

-), [Cd(L)(CH

3COO)(OH

2)]

n (1),{[Cd

2(L)

2(NO

2)

2(CH

3OH)

2]·CH

3OH}

n (2), {[Cd

2(L)

2Cl

2(CH

3OH)

2]·CH

3OH}

n (3), [Cd(HL)I

2]

n (4), [Cd

3(L)

2(N

3)

4]

n (5), [Cd(L)(SCN)(OH

2)]

n (6) and [Cd(HL)(SCN)

2]

n (7) {HL = 2-pyridinecarbaldehyde isonicotinoyl hydrazone (HPCIH)} in order to rationalize the effect of the anion, have been synthesized and characterized by elemental analyses, FT-IR spectroscopy, single crystal X-ray data diffraction, etc. The results show the influence of the counter-ions on the coordination mode of the cadmium ion that is capable of forming compounds with five-, six- and seven-coordination numbers. The ligand acts as a negatively charged tetradentate N

3O-donor ligand and coordinates to the cadmium center in the enolic form (NNCO) in 1-3 and 5-6 while in compounds 4 and 7 coordinates as N

3- and N

3O-donor neutral ligand in keto form (NNHCO), respectively. Cadmium centers in 1-4 and 6, bridging by the HPCIH ligand cause to form one-dimensional coordination polymers and the anions act as terminal ligands. In compounds 5 and 7, the N

3

- and SCN

- also act as bridging ligands to the metal centers, and form 3D and 2D metal-organic polymers respectively.

Organisation(s)
Department of Mineralogy and Crystallography
External organisation(s)
University of Tabriz, University of Melbourne, Villanova University, Cardinal Stefan Wyszynski University in Warsaw, Clemson University, Università degli Studi di Perugia
Journal
Inorganica Chimica Acta
Volume
427
Pages
87-96
No. of pages
10
ISSN
0020-1693
DOI
https://doi.org/10.1016/j.ica.2014.11.028
Publication date
12-2014
Peer reviewed
Yes
Austrian Fields of Science 2012
104015 Organic chemistry, 104011 Materials chemistry, 105113 Crystallography
Keywords
ASJC Scopus subject areas
Materials Chemistry, Inorganic Chemistry, Physical and Theoretical Chemistry
Portal url
https://ucrisportal.univie.ac.at/en/publications/6d9b8c64-48b9-4918-8904-89516b4b4b5d