A novel linkage isomeric pair of mixed ligand Ni(II) complexes with IM2py-κ2N,O and IM2py-κ2N,N modes in [Ni(acac)(tmen)(IM2py)]+; synthesis and X-ray structure

Yasunori Tsukahara, Takayuki Kamatani, Takayoshi Suzuki, Sumio Kaizaki

Research output: Contribution to journalArticle

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Abstract

This is the first report of a Ni(II) complex with the six-membered IM2py chelate coordinating via oxygen, [Ni(acac)(tmen)(IM2py-κ2N,O)] PF6 (1·PF6) (acac = acetylacetonate; tmen = N,N,N′,N′-tetramethylethylenediamine; IM2py = 2-(2-(pyridyl)-4,4,5, 5-tetramethyl-4,5-dihydro-1H-imidazol-1-oxy). This new complex 1·PF 6 has been synthesized by the direct reaction between [Ni(acac)(tmen)]PF6 and IM2py. The X-ray analysis (monoclinic, P21lc, a = 15.378(2), b = 13.331(2), c= 16.560(2) Å, β= 116.377(6)°, Z = 4) demonstrated that the IM2py ligand is coordinated to Ni(II) as an unprecedent six-membered didentate chelate with the k 2N,O mode in 1. The corresponding linkage isomer, [Ni(acac)(tmen)(IM2py-κ2N,N)]PF6 (2·PF 6), was obtained from the deoxygenation reaction of [Ni(acac)(tmen)(NIT2py)]PF6 with NaNO2. Variable-temperature measurements of the magnetic susceptibility and UV-vis absorption bands indicated a ferromagnetic interaction in 2·PF 6 and an antiferromagentic one in 1·PF6. These facts confirm a linkage isomeric pair of [Ni(acac)(tmen)(IM2py- κ2N,O)]+ (1) and [Ni(acac)(tmen)(IM2py- κ2N,N)]+ (2) with oxygen and nitrogen coordination, respectively, in the IM moiety.

Original languageEnglish
Pages (from-to)1276-1279
Number of pages4
JournalDalton Transactions
Issue number7
DOIs
Publication statusPublished - Apr 7 2003
Externally publishedYes

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Oxygen
Ligands
X rays
X ray analysis
Magnetic susceptibility
Temperature measurement
Isomers
Absorption spectra
Nitrogen
2-imidazoline
N,N,N',N'-tetramethylethylenediamine
acetyl acetonate

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

A novel linkage isomeric pair of mixed ligand Ni(II) complexes with IM2py-κ2N,O and IM2py-κ2N,N modes in [Ni(acac)(tmen)(IM2py)]+; synthesis and X-ray structure. / Tsukahara, Yasunori; Kamatani, Takayuki; Suzuki, Takayoshi; Kaizaki, Sumio.

In: Dalton Transactions, No. 7, 07.04.2003, p. 1276-1279.

Research output: Contribution to journalArticle

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abstract = "This is the first report of a Ni(II) complex with the six-membered IM2py chelate coordinating via oxygen, [Ni(acac)(tmen)(IM2py-κ2N,O)] PF6 (1·PF6) (acac = acetylacetonate; tmen = N,N,N′,N′-tetramethylethylenediamine; IM2py = 2-(2-(pyridyl)-4,4,5, 5-tetramethyl-4,5-dihydro-1H-imidazol-1-oxy). This new complex 1·PF 6 has been synthesized by the direct reaction between [Ni(acac)(tmen)]PF6 and IM2py. The X-ray analysis (monoclinic, P21lc, a = 15.378(2), b = 13.331(2), c= 16.560(2) {\AA}, β= 116.377(6)°, Z = 4) demonstrated that the IM2py ligand is coordinated to Ni(II) as an unprecedent six-membered didentate chelate with the k 2N,O mode in 1. The corresponding linkage isomer, [Ni(acac)(tmen)(IM2py-κ2N,N)]PF6 (2·PF 6), was obtained from the deoxygenation reaction of [Ni(acac)(tmen)(NIT2py)]PF6 with NaNO2. Variable-temperature measurements of the magnetic susceptibility and UV-vis absorption bands indicated a ferromagnetic interaction in 2·PF 6 and an antiferromagentic one in 1·PF6. These facts confirm a linkage isomeric pair of [Ni(acac)(tmen)(IM2py- κ2N,O)]+ (1) and [Ni(acac)(tmen)(IM2py- κ2N,N)]+ (2) with oxygen and nitrogen coordination, respectively, in the IM moiety.",
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T1 - A novel linkage isomeric pair of mixed ligand Ni(II) complexes with IM2py-κ2N,O and IM2py-κ2N,N modes in [Ni(acac)(tmen)(IM2py)]+; synthesis and X-ray structure

AU - Tsukahara, Yasunori

AU - Kamatani, Takayuki

AU - Suzuki, Takayoshi

AU - Kaizaki, Sumio

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N2 - This is the first report of a Ni(II) complex with the six-membered IM2py chelate coordinating via oxygen, [Ni(acac)(tmen)(IM2py-κ2N,O)] PF6 (1·PF6) (acac = acetylacetonate; tmen = N,N,N′,N′-tetramethylethylenediamine; IM2py = 2-(2-(pyridyl)-4,4,5, 5-tetramethyl-4,5-dihydro-1H-imidazol-1-oxy). This new complex 1·PF 6 has been synthesized by the direct reaction between [Ni(acac)(tmen)]PF6 and IM2py. The X-ray analysis (monoclinic, P21lc, a = 15.378(2), b = 13.331(2), c= 16.560(2) Å, β= 116.377(6)°, Z = 4) demonstrated that the IM2py ligand is coordinated to Ni(II) as an unprecedent six-membered didentate chelate with the k 2N,O mode in 1. The corresponding linkage isomer, [Ni(acac)(tmen)(IM2py-κ2N,N)]PF6 (2·PF 6), was obtained from the deoxygenation reaction of [Ni(acac)(tmen)(NIT2py)]PF6 with NaNO2. Variable-temperature measurements of the magnetic susceptibility and UV-vis absorption bands indicated a ferromagnetic interaction in 2·PF 6 and an antiferromagentic one in 1·PF6. These facts confirm a linkage isomeric pair of [Ni(acac)(tmen)(IM2py- κ2N,O)]+ (1) and [Ni(acac)(tmen)(IM2py- κ2N,N)]+ (2) with oxygen and nitrogen coordination, respectively, in the IM moiety.

AB - This is the first report of a Ni(II) complex with the six-membered IM2py chelate coordinating via oxygen, [Ni(acac)(tmen)(IM2py-κ2N,O)] PF6 (1·PF6) (acac = acetylacetonate; tmen = N,N,N′,N′-tetramethylethylenediamine; IM2py = 2-(2-(pyridyl)-4,4,5, 5-tetramethyl-4,5-dihydro-1H-imidazol-1-oxy). This new complex 1·PF 6 has been synthesized by the direct reaction between [Ni(acac)(tmen)]PF6 and IM2py. The X-ray analysis (monoclinic, P21lc, a = 15.378(2), b = 13.331(2), c= 16.560(2) Å, β= 116.377(6)°, Z = 4) demonstrated that the IM2py ligand is coordinated to Ni(II) as an unprecedent six-membered didentate chelate with the k 2N,O mode in 1. The corresponding linkage isomer, [Ni(acac)(tmen)(IM2py-κ2N,N)]PF6 (2·PF 6), was obtained from the deoxygenation reaction of [Ni(acac)(tmen)(NIT2py)]PF6 with NaNO2. Variable-temperature measurements of the magnetic susceptibility and UV-vis absorption bands indicated a ferromagnetic interaction in 2·PF 6 and an antiferromagentic one in 1·PF6. These facts confirm a linkage isomeric pair of [Ni(acac)(tmen)(IM2py- κ2N,O)]+ (1) and [Ni(acac)(tmen)(IM2py- κ2N,N)]+ (2) with oxygen and nitrogen coordination, respectively, in the IM moiety.

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