Syntheses, crystal structures and spectroscopy of di/tri/tetranuclear discrete and co-crystalline copper(II)-NaI/ZnII/Cd II complexes derived from a compartmental ligand: Inconsistency in the shifting of the copper(II) d-d band

Sagarika Bhattacharya, Arpita Jana, Sasankasekhar Mohanta

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

The work in this report presents the syntheses, characterization, crystal structures and electronic spectra of the six heteronuclear complexes [Cu IIL1NaI(μ-BF4)2Na IL1CuII2CH 3COCH3 (1), [CuIIL1Na I(NO3)(MeOH)] (2), [CuIIL1Zn II(H2O)2L1CuII](ClO 4)2 (3), [CuII(MeOH)L1Zn IICl2] (4), [CuIIL1Cd II(H2O)(MeOH)2](ClO4)2 (5) and [CuIIL1CdIICl2(MeOH)][CuII(MeOH) L1CdIICl2] (6), where H2L 1 is N,N′-ethylenebis(3-methoxysalicylaldimine). The crystal systems and space groups are as follows: 1 and 2, triclinic, P1̄; 3 and 6, monoclinic, P21/c; 4, orthorhombic, P21212 1; 5, monoclinic, C2/c. While the N(imine)2O(phenoxo) 2 compartment accommodates the copper(II) center, the larger and open O(phenoxo)2O(methoxy)2 compartment interacts with the second metal ion. Compounds 2, 4 and 5 are diphenoxo-bridged dinuclear systems, compound 3 is a trinuclear system in which the two CuIIZn II pairs are monophenoxo-bridged, compound 1 is a tetranuclear system in which two diphenoxo-bridged CuIINaI units are interlinked by two tetrafluoroborate moieties, and compound 6 is a [2×1+2×1] co-crystal of two dinuclear CuIICdII units. The solid state electronic spectra of compounds 1-6 and also the mononuclear compound [CuIIL1(H2O)] have been recorded in the range 400-800 nm. While correlating the d-d band position with the structural parameters and a previously proposed correlation, some inconsistency has been found, indicating that this area should be explored further.

Original languageEnglish
Pages (from-to)234-242
Number of pages9
JournalPolyhedron
Volume62
DOIs
StatePublished - 1 Jan 2013
Externally publishedYes

Keywords

  • Blue shifting
  • Co-crystal
  • Compartmental ligand
  • Crystal structure
  • Heteronuclear
  • Spectroscopy

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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