Crystal structure of bis{l-2-methoxy-6-[(methylimino) methyl]phenolato}bis({2-methoxy-6- [(methylimino)methyl]phenolato}nickel(II)) involving different coordination modes of the same Schiff base ligand

Olga Yu Vassilyeva, Vladimir N. Kokozay, Brian W. Skelton

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Abstract

The structure of the title compound, [Ni2(C9H10NO2)4], is built up by discrete centrosymmetric dimers. Two nitrogen and three oxygen atoms of two Schiff base ligands singly deprotonated at the phenolate site form a square-pyramidal environment for each metal atom. The ligands are bonded differently to the metal centre: one of the phenolic O atoms is bound to one nickel atom, whereas another bridges the two metal atoms to form the dimer. The Ni - N/O distances fall in the range 1.8965(13)-1.9926(15)Å, with the Ni - N bonds being slightly longer; the fifth contact of the metal to the bridging phenolate oxygen atom is substantially elongated [2.533(1)Å]. A similar coordination geometry was observed in the isomorphous Cu analogue previously reported by us [Sydoruk et al. (2013). Acta Cryst. E69, m551-m552]. In the crystal, the [Ni2 L 4] molecules form sheets parallel to the ab plane with the polar methoxy groups protruding into the intersheet space and keeping the sheets apart. Within a sheet, the molecules are stacked relative to each other in such a way that the Ni2O2 planes of neighbouring molecules are orthogonal.

Original languageEnglish
Pages (from-to)620-623
Number of pages4
JournalActa Crystallographica Section E: Crystallographic Communications
Volume75
DOIs
Publication statusPublished - 1 Jan 2019

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Schiff Bases
Nickel
imines
Crystal structure
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nickel
Atoms
ligands
crystal structure
Metals
metals
atoms
oxygen atoms
dimers
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Dimers
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Oxygen
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@article{59a3525f6c964a2697eea73962c43f9b,
title = "Crystal structure of bis{l-2-methoxy-6-[(methylimino) methyl]phenolato}bis({2-methoxy-6- [(methylimino)methyl]phenolato}nickel(II)) involving different coordination modes of the same Schiff base ligand",
abstract = "The structure of the title compound, [Ni2(C9H10NO2)4], is built up by discrete centrosymmetric dimers. Two nitrogen and three oxygen atoms of two Schiff base ligands singly deprotonated at the phenolate site form a square-pyramidal environment for each metal atom. The ligands are bonded differently to the metal centre: one of the phenolic O atoms is bound to one nickel atom, whereas another bridges the two metal atoms to form the dimer. The Ni - N/O distances fall in the range 1.8965(13)-1.9926(15){\AA}, with the Ni - N bonds being slightly longer; the fifth contact of the metal to the bridging phenolate oxygen atom is substantially elongated [2.533(1){\AA}]. A similar coordination geometry was observed in the isomorphous Cu analogue previously reported by us [Sydoruk et al. (2013). Acta Cryst. E69, m551-m552]. In the crystal, the [Ni2 L 4] molecules form sheets parallel to the ab plane with the polar methoxy groups protruding into the intersheet space and keeping the sheets apart. Within a sheet, the molecules are stacked relative to each other in such a way that the Ni2O2 planes of neighbouring molecules are orthogonal.",
keywords = "crystal structure, methylamine., Ni dimer, o-vanillin, Schiff base ligand",
author = "Vassilyeva, {Olga Yu} and Kokozay, {Vladimir N.} and Skelton, {Brian W.}",
year = "2019",
month = "1",
day = "1",
doi = "10.1107/S2056989019004766",
language = "English",
volume = "75",
pages = "620--623",
journal = "Acta Crystallographica. Section E: Structure Reports Online",
issn = "1600-5368",
publisher = "INT UNION CRYSTALLOGRAPHY",

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TY - JOUR

T1 - Crystal structure of bis{l-2-methoxy-6-[(methylimino) methyl]phenolato}bis({2-methoxy-6- [(methylimino)methyl]phenolato}nickel(II)) involving different coordination modes of the same Schiff base ligand

AU - Vassilyeva, Olga Yu

AU - Kokozay, Vladimir N.

AU - Skelton, Brian W.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - The structure of the title compound, [Ni2(C9H10NO2)4], is built up by discrete centrosymmetric dimers. Two nitrogen and three oxygen atoms of two Schiff base ligands singly deprotonated at the phenolate site form a square-pyramidal environment for each metal atom. The ligands are bonded differently to the metal centre: one of the phenolic O atoms is bound to one nickel atom, whereas another bridges the two metal atoms to form the dimer. The Ni - N/O distances fall in the range 1.8965(13)-1.9926(15)Å, with the Ni - N bonds being slightly longer; the fifth contact of the metal to the bridging phenolate oxygen atom is substantially elongated [2.533(1)Å]. A similar coordination geometry was observed in the isomorphous Cu analogue previously reported by us [Sydoruk et al. (2013). Acta Cryst. E69, m551-m552]. In the crystal, the [Ni2 L 4] molecules form sheets parallel to the ab plane with the polar methoxy groups protruding into the intersheet space and keeping the sheets apart. Within a sheet, the molecules are stacked relative to each other in such a way that the Ni2O2 planes of neighbouring molecules are orthogonal.

AB - The structure of the title compound, [Ni2(C9H10NO2)4], is built up by discrete centrosymmetric dimers. Two nitrogen and three oxygen atoms of two Schiff base ligands singly deprotonated at the phenolate site form a square-pyramidal environment for each metal atom. The ligands are bonded differently to the metal centre: one of the phenolic O atoms is bound to one nickel atom, whereas another bridges the two metal atoms to form the dimer. The Ni - N/O distances fall in the range 1.8965(13)-1.9926(15)Å, with the Ni - N bonds being slightly longer; the fifth contact of the metal to the bridging phenolate oxygen atom is substantially elongated [2.533(1)Å]. A similar coordination geometry was observed in the isomorphous Cu analogue previously reported by us [Sydoruk et al. (2013). Acta Cryst. E69, m551-m552]. In the crystal, the [Ni2 L 4] molecules form sheets parallel to the ab plane with the polar methoxy groups protruding into the intersheet space and keeping the sheets apart. Within a sheet, the molecules are stacked relative to each other in such a way that the Ni2O2 planes of neighbouring molecules are orthogonal.

KW - crystal structure

KW - methylamine.

KW - Ni dimer

KW - o-vanillin

KW - Schiff base ligand

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DO - 10.1107/S2056989019004766

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