Mechano-chemical syntheses of new cobalt(II) complexes of alkyl 2-(pyridine-2yl-methylene) hydrazinecarboxylates: Crystal structures, spectroscopic and photoluminescence properties

New cobalt (II) complexes of general formula [Co(L) (NO3) (H2O)2]·NO3 (L = methyl 2-(pyridine-2yl-methylene) hydrazinecarboxylate, C8H9N3O2 (2-PYMC) (1) and ethyl 2-(pyridine-2yl-methylene) hydrazinecarboxylate, C9H11N3O2 (2-PYEC) (2), have been synthesized and characterized by elemental analysis, U...

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Bibliographic Details
Published in:Journal of molecular structure 2020-04, Vol.1205, p.127666, Article 127666
Main Authors: Sathiyakumar, Subramani, Selvam, Pitchai, Antharjanam, Sudhadevi, Hakkim, Furuck Lukmanul, Srinivasan, Krishnan, Harrison, William T.A.
Format: Article
Language:English
Subjects:
Crystal structure
Hydrazinecarboxylate
Metal complex
Photoluminescence
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Summary:New cobalt (II) complexes of general formula [Co(L) (NO3) (H2O)2]·NO3 (L = methyl 2-(pyridine-2yl-methylene) hydrazinecarboxylate, C8H9N3O2 (2-PYMC) (1) and ethyl 2-(pyridine-2yl-methylene) hydrazinecarboxylate, C9H11N3O2 (2-PYEC) (2), have been synthesized and characterized by elemental analysis, UV–vis, IR, and photoluminescence measurements. The crystal structures of 1 and 2 reveal the presence of CoN2O5 pentagonal-bipyramidal coordination polyhedra in each complex: the basal plane consists of an N, N, O-tridentate 2-PYMC/2-PYEC ligand and a chelating nitrate anion and the axial sites are occupied by water molecules. The crystal structures are consolidated by O–H⋯O and C–H⋯O hydrogen bonds. [Display omitted] •Solvent-free mechano-chemical method.•Synthesis of new hydrazinecarboxylates.•New seven-coordinated cobalt complexes with chelating nitrate ion.
ISSN:0022-2860
1872-8014
DOI:10.1016/j.molstruc.2019.127666