Dinuclear nickel(II) complexes of reduced asymmetric compartmental ligands

被引：17

作者：

Adams, H ^{[1
]}

Clunas, S ^{[1
]}

Fenton, DE ^{[1
]}

Spey, SE ^{[1
]}

机构：

[1] Univ Sheffield, Dept Chem, Sheffield S3 7HF, S Yorkshire, England

来源：

DALTON TRANSACTIONS | 2003年 / 04期

关键词：

D O I：

10.1039/b209437c

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The reaction of the reduced asymmetric compartmental proligand 2-{[(2-dimethylaminoethyl) ethylamino] methyl}-4-methyl-6-{[(pyridin-2-ylmethyl)amino] methyl} phenol, HL4 with nickel(II) acetate in the presence of non-coordinating anions gave dinuclear nickel(II) complexes. The crystal structures of [Ni2L6(OAc)(mu-OAc)(OH2)(CH3OH)][PF6], 2, [Ni2L4(mu-OAc)(2)(CH3OH)][PF6], 3, [Ni2L4(mu-OAc)(2)(OH2)(CH3OH)][PF6], 4, and [Ni2L4(mu-OAc)(2)(CH3OH)(2)][BPh4], 5, are reported. 2-[( 2- Dimethylaminoethylamino) methyl]-6-{[(2-dimethylaminoethyl)ethylamino]methyl}-4-methylphenol, HL5, was found to react with Ni(ClO4)(2).4H(2)O and NaBPh4 in the presence of urea. to give [Ni2L5(OH)(OH2)(2)(urea)][BPh4](2), 6, the dinuclear core of which bears some resemblance to that of the active site in urease. The crystal structure reveals the presence of a hydroxo-bridge and an O-bonded molecule of urea.

引用

页码：625 / 630

页数：6

共 22 条

[1] Diversity in the reactions of unsymmetric dinucleating Schiff base ligands with CuII and NiII [J].

Adams, H ;

Fenton, DE ;

Haque, SR ;

Heath, SL ;

Ohba, M ;

Okawa, H ;

Spey, SE .

JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 2000, (12) :1849-1856

[2] A tetranuclear nickel(II) complex assembled from an asymmetric compartmental ligand and bearing an intramolecular [H3O2]2- bridge [J].

Adams, H ;

Clunas, S ;

Fenton, DE .

CHEMICAL COMMUNICATIONS, 2002, (05) :418-419

[3] The systematic generation of monodentate bridging ethanoates in dinuclear nickel(II) complexes of asymmetric compartmental ligands [J].

Adams, H ;

Clunas, S ;

Fenton, DE ;

Spey, SE .

JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 2002, (03) :441-448

[4] Nickel(II) induced cleavage of the iminic pendant arm in unsymmetrical Schiff base compartmental ligands [J].

Adams, H ;

Clunas, S ;

Fenton, DE .

INORGANIC CHEMISTRY COMMUNICATIONS, 2001, 4 (11) :667-670

[5] SYNTHESIS, STRUCTURE, AND SPECTROSCOPIC PROPERTIES OF COPPER(II) COMPOUNDS CONTAINING NITROGEN SULFUR DONOR LIGANDS - THE CRYSTAL AND MOLECULAR-STRUCTURE OF AQUA[1,7-BIS(N-METHYLBENZIMIDAZOL-2'-YL)-2,6-DITHIAHEPTANE]COPPER(II) PERCHLORATE [J].

ADDISON, AW ;

RAO, TN ;

REEDIJK, J ;

VANRIJN, J ;

VERSCHOOR, GC .

JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 1984, (07) :1349-1356

[6] Interaction of urea with a hydroxide-bridged dinuclear nickel center: An alternative model for the mechanism of urease [J].

Barrios, AM ;

Lippard, SJ .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2000, 122 (38) :9172-9177

[7] A new proposal for urease mechanism based on the crystal structures of the native and inhibited enzyme from Bacillus pasteurii:: why urea hydrolysis casts two nickels [J].

Benini, S ;

Rypniewski, WR ;

Wilson, KS ;

Miletti, S ;

Ciurli, S ;

Mangani, S .

STRUCTURE, 1999, 7 (02) :205-216

[8] The complex of Bacillus pasteurii urease with β-mercaptoethanol from X-ray data at 1.65-Å resolution [J].

Benini, S ;

Rypniewski, WR ;

Wilson, KS ;

Ciurli, S ;

Mangani, S .

JOURNAL OF BIOLOGICAL INORGANIC CHEMISTRY, 1998, 3 (03) :268-273

[9] Structural properties of the nickel ions in urease: novel insights into the catalytic and inhibition mechanisms [J].

Ciurli, S ;

Benini, S ;

Rypniewski, WR ;

Wilson, KS ;

Miletti, S ;

Mangani, S .

COORDINATION CHEMISTRY REVIEWS, 1999, 190 :331-355

[10] Unsymmetric dinucleating ligands for metallobiosite modelling [J].

Fenton, DE ;

Okawa, H .

CHEMISCHE BERICHTE-RECUEIL, 1997, 130 (04) :433-442

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