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 language | English |
|---|---|
| Pages (from-to) | 1276-1279 |
| Number of pages | 4 |
| Journal | Dalton Transactions |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - Apr 7 2003 |
| Externally published | Yes |
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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 journal › Article
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TY - JOUR
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
PY - 2003/4/7
Y1 - 2003/4/7
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.
UR - http://www.scopus.com/inward/record.url?scp=1642550118&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=1642550118&partnerID=8YFLogxK
U2 - 10.1039/b301530k
DO - 10.1039/b301530k
M3 - Article
AN - SCOPUS:1642550118
SP - 1276
EP - 1279
JO - Dalton Transactions
JF - Dalton Transactions
SN - 1477-9226
IS - 7
ER -