The synthesis and spectral properties of 1,3-substituted phenyl-5-phenylformazans and their Ni(II) complexes

Tezcan H., Uzluk E.

DYES AND PIGMENTS, vol.76, no.3, pp.733-740, 2008 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 76 Issue: 3
  • Publication Date: 2008
  • Doi Number: 10.1016/j.dyepig.2007.01.016
  • Journal Name: DYES AND PIGMENTS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.733-740
  • Keywords: formazans dyes, nickel complexes dyes, spectroscopy, substituent effect, FORMAZANS, IRON, COPPER
  • Gazi University Affiliated: No

Abstract

Novel, 1:2 Ni(II) complexes of 1,3-substituted phenyl-5-phenylformazans were synthesized. The formazans contained -NO2, -Cl, -Br, -CH3 -OCH3 groups at the o-, m-, p-positions of the 1-phenyl ring and -NO2 and -OCH3 groups at the m- and p-positions of the 3-phenyl ring. Their structures were identified by elemental analyses, FTIR, H-1 NMR, C-13 NMR, UV-vis and GC-mass spectra. UV-vis spectra indicated that their A a was shifted to an extent that depended upon the type and position of the substituent on the ring. A linear correlation was obtained between Hammett substituent coefficients and lambda(max) values. (c) 2007 Elsevier Ltd. All rights reserved.