Concomitant crystallization of Copper(II) sachharinato complexes with 2-methylpyrazine as a monomer and an one-dimensional polymer: Syntheses, crystal structures, spectroscopic and thermal properties


YILMAZ V. T. , Senel E., Kazak C.

JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS, vol.18, no.3, pp.407-413, 2008 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 18 Issue: 3
  • Publication Date: 2008
  • Doi Number: 10.1007/s10904-008-9218-8
  • Journal Name: JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.407-413
  • Keywords: saccharinate, 2-methylyrazine, copper(II) complex, coordination polymer, one-dimensional chain, two-dimensional framework, MAGNETIC-PROPERTIES, DICYANAMIDE N(CN)(2)(-), SUPEREXCHANGE MECHANISM, DEPROTONATED SACCHARIN, COORDINATION POLYMERS, SUBSTITUTED PYRAZINE, NITRATE, PYZ, PERCHLORATE, ISOMERISM
  • Karadeniz Technical University Affiliated: No

Abstract

The reaction of [Cu(sac)(2)(H(2)O)(4)] center dot 2H(2)O with 2-methylpyrazine (mpyz) leads two complexes, concomitant crystallization of a mononuclear complex [Cu(sac)(2)(mpyz)(H(2)O)(2)] (1) and a polymeric complex [Cu(sac)(2)(mu-mpyz)](n) (2). Both complexes have been characterized by elemental analyses, magnetic measurements, FT-IR and ESR, TG-DTA and single-crystal X-ray diffraction analyses. Single-crystal X-ray analyses show that complex 1 consists of discrete molecules in which the copper(II) ions exhibits a square-pyramidal coordination geometry. The individual molecules of 1 are connected into a hydrogen-bonded chain structure, which is further assembled to form a three-dimensional network by pi-pi stacking interactions. Complex 2 is an 1D coordination polymer in which copper(II) centers are bridged by the mpyz ligand. The chains are further assembled to form two-dimensional frameworks by pi-pi and C-H center dot center dot center dot pi stacking interactions.